Process for photocatalytically synthesizing hydrogen peroxide to resist algae

Abstract

The invention discloses a process for resisting algae by photocatalytic synthesis of hydrogen peroxide, relates to the technical field of algae resistance of hydrogen peroxide, and aims to solve the problem that the inhibition effect is poor when hydrogen peroxide is used for resisting algae. According to the method, timely and accurate data can be provided through the daytime treatment process and the night treatment process, rapid adjustment of treatment parameters is facilitated, the treatment effect is ensured, the structure and performance of the catalyst are improved through the steps of pyrolysis, chemical vapor deposition, reduction, doping and the like, the catalytic activity and stability of the catalyst are improved, and the method is suitable for industrial production. By accurately controlling reaction conditions and optimizing a catalyst structure, high-selectivity two-electron oxygen reduction reaction can be realized to generate H2O2, and accurate control on the reaction conditions is realized by measures of preparing a specific electrolyte, introducing pure oxygen as an oxygen source, controlling cathode potential and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen peroxide anti-algae technology, and relates to a process for photocatalytic synthesis of hydrogen peroxide for anti-algae. Background Art

[0002] Hydrogen peroxide anti-algae is a method of using hydrogen peroxide (hydrogen peroxide, H 2 O 2 ) as a means to combat the growth of algae.

[0003] Chinese Patent with Publication No. CN114956251B discloses a device for photocatalytic-hydrogen peroxide synergistic oxidation treatment of aniline wastewater. It mainly realizes the synergistic effect of the cathode and anode through an electrochemical reaction that constructs a Bi metal-air battery mechanism, effectively coupling the photocatalytic process and the hydrogen peroxide oxidation process. It not only solves the problems of high energy consumption or poor treatment effect in a single process but also solves the problem of complex coupling process of the two processes, and has the advantages of simple operation, low operating energy consumption, good treatment effect, etc., and has good industrial application prospects. Although the above patent solves the problem of hydrogen peroxide anti-algae, there are still the following problems in actual operation: 1. There is no more perfect selection and treatment of photocatalytic materials and electrocatalytic materials, resulting in poor synthesis effect.

[0004] 2. There is no separate treatment of hydrogen peroxide anti-algae during the day and at night according to the actual situation, resulting in poor hydrogen peroxide anti-algae effect.

[0005] 3. There is no effective economic benefit and environmental benefit analysis of the final inhibition effect, resulting in the inability to solve the inhibition effect targeted. Summary of the Invention

[0006] The purpose of the present invention is to provide a process for photocatalytic synthesis of hydrogen peroxide for anti-algae. Through the day treatment process and the night treatment process, timely and accurate data can be provided, which helps to quickly adjust the treatment parameters and ensure the treatment effect. Through steps such as pyrolysis, chemical vapor deposition, reduction, and doping, the structure and performance of the catalyst are improved, and its catalytic activity and stability are enhanced. By precisely controlling the reaction conditions and optimizing the catalyst structure, a highly selective two-electron oxygen reduction reaction can be achieved to generate H 2 O 2 , and through measures such as configuring a specific electrolyte, introducing pure oxygen as the oxygen source, and controlling the cathode potential, precise control of the reaction conditions can be achieved, and the problems in the prior art can be solved.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A process for photocatalytic synthesis of hydrogen peroxide for anti-algae, comprising: Prepare the photocatalytic material and the electrocatalytic material. During the day, utilize solar energy and the photocatalytic material to synthesize hydrogen peroxide. At night, use a solar cell to drive the electrocatalytic technology and the electrocatalytic material to continuously synthesize hydrogen peroxide; Monitor and analyze the concentration of the synthesized hydrogen peroxide respectively. Evaluate the inhibitory effect of hydrogen peroxide on algae in the water body according to the analysis results. Finally, based on the inhibitory effect of hydrogen peroxide on algae in the water body, conduct an assessment of economic benefits and environmental benefits, and generate an assessment report.

[0008] Preferably, prepare the photocatalytic material and the electrocatalytic material, including: The photocatalytic material is graphitic carbon nitride and D-A structure conjugated polymer; Graphitic carbon nitride is synthesized by thermal polymerization reaction. Adjust the reaction conditions to optimize the photocatalytic performance. The reaction conditions include temperature, time, and raw material ratio; The D-A structure conjugated polymer connects electron-rich and electron-deficient molecules through high-temperature hydrothermal synthesis or polycondensation reaction, and adjusts the reaction parameters to obtain the structure and performance; The electrocatalytic material is graphite carbon felt and carbon-based material; Graphite carbon felt derives carbon material by pyrolyzing phenolic resin, and optimizes the catalytic performance by doping nitrogen, cobalt, and iron; The carbon-based material uses chemical modification methods to increase the active sites in the electrocatalytic reaction. The chemical modification methods include reducing graphene oxide or doping heteroatoms.

[0009] Preferably, utilize solar energy and the photocatalytic material to synthesize hydrogen peroxide during the day, including: First, synthesize graphitic carbon nitride and D-A structure conjugated polymer. Among them, the synthesis process of graphitic carbon nitride is: Operate graphitic carbon nitride by thermal polymerization reaction method. Use melamine or urea as the precursor, calcine in an inert gas at 550 - 600 °C for 2 - 4 hours to form layered graphitic carbon nitride; reduce the polymerization temperature of the layered graphitic carbon nitride and introduce thiourea or melamine trithiocyanate to form sulfur-doped graphitic carbon nitride. Finally, compound the sulfur-doped graphitic carbon nitride with titanium dioxide and bismuth vanadate to obtain the synthesized graphitic carbon nitride; The synthesis process of the D-A structure conjugated polymer is: Operate the D-A structure conjugated polymer by high-temperature hydrothermal method. Mix the electron-rich unit and the electron-deficient unit in a solvent, react at 180 - 200 °C for 12 - 24 hours to form a D-A alternating copolymer. Connect the donor and acceptor monomers through coupling or reaction, adjust the ratio to optimize the light absorption and carrier mobility, and then introduce carboxyl or sulfonic acid groups to enhance the hydrophilicity to obtain the synthesized D-A structure conjugated polymer.

[0010] Preferably, reducing the polymerization temperature of the layered graphitic carbon nitride includes: Extracting the cooling stage at which the polymerization temperature of the current layered graphitic carbon nitride is cooled; Extracting the basic cooling gradient corresponding to the cooling stage from the database; Extracting the layer thickness of the layered graphitic carbon nitride; Comparing the layer thickness of the layered graphitic carbon nitride with a preset thickness reference value; When the layer thickness of the layered graphitic carbon nitride does not exceed the preset thickness reference value, reducing the polymerization temperature of the layered graphitic carbon nitride using the basic cooling gradient corresponding to the cooling stage; When the layer thickness of the layered graphitic carbon nitride exceeds the preset thickness reference value, retrieving the material parameters of the layered graphitic carbon nitride; Adjusting the basic cooling gradient using the material parameters of the layered graphitic carbon nitride to obtain an adjusted cooling gradient; Reducing the polymerization temperature of the layered graphitic carbon nitride using the adjusted cooling gradient.

[0011] Preferably, adjusting the basic cooling gradient using the material parameters of the layered graphitic carbon nitride to obtain an adjusted cooling gradient includes: Extracting the material parameters of the layered graphitic carbon nitride, where the material parameters of the layered graphitic carbon nitride include material thermal conductivity, layer thickness, layered graphitic carbon nitride density, and specific heat capacity; Retrieving the decomposition activation energy (J / mol) of the sulfur dopant corresponding to thiourea or trithiocyanuric acid; Obtaining a cooling gradient adjustment coefficient (dimensionless) using the material parameters of the layered graphitic carbon nitride in combination with the decomposition activation energy of the sulfur dopant corresponding to thiourea or trithiocyanuric acid; Among them, the cooling gradient adjustment coefficient is obtained through the following formula:

[0012] Among them, Q represents the cooling gradient adjustment coefficient; E a represents the decomposition activation energy of the sulfur dopant; L represents the layer thickness of the layered graphitic carbon nitride; ρ represents the density of the layered graphitic carbon nitride; C represents the specific heat capacity of the layered graphitic carbon nitride; k represents the material thermal conductivity of the layered graphitic carbon nitride; R represents the ideal gas constant, with the unit J / (mol·K), and the value is taken as 8.314; Adjusting the basic cooling gradient using the cooling gradient adjustment coefficient to obtain an adjusted cooling gradient; among them, the adjusted cooling gradient is obtained through the following formula:

[0013] Among them, T x represents the adjusted cooling gradient; T 0 represents the basic cooling gradient; Q represents the cooling gradient adjustment coefficient.

[0014] Preferably, solar energy and photocatalytic materials are used for hydrogen peroxide synthesis during the day, and it also includes: After the synthesis of graphitic carbon nitride and D-A structure conjugated polymer, the photocatalytic reactor is designed; The structure of the photocatalytic reactor is as follows: an open trough reactor or a thin film reactor is used, covered with a light-transmitting material, and allowing full-spectrum sunlight to penetrate. And the open trough reactor or thin film reactor is internally provided with a porous carrier loaded with photocatalytic materials to form an immobilized catalyst layer. The porous carrier includes nickel foam or carbon cloth; The control conditions of the photocatalytic reactor include light intensity, solution system and oxygen supply. The light intensity is controlled by using a solar simulator or natural light; the solution system uses deionized water as a solvent, and a small amount of ethanol (0.5 - 1 vol%) is added as a hole sacrificial agent to inhibit electron-hole recombination; the oxygen supply is to continuously introduce air or pure oxygen through an aeration device to provide O 2 as an electron acceptor; The photocatalytic reactor excites the synthesized graphitic carbon nitride and D-A structure conjugated polymer, and electrons and holes are generated after excitation; Then, the internal electric field formed by the heterojunction or doping accelerates the charge separation, and the electrons migrate to the catalyst surface to participate in the reduction reaction; According to the reduction reaction, the generation path of hydrogen peroxide is obtained, and the generation path includes a two-electron oxygen reduction reaction and hole consumption; According to the generation path, the photocatalytic material synthesizes hydrogen peroxide.

[0015] Preferably, during the night, a solar cell is used to drive electrocatalytic technology and electrocatalytic materials for continuous hydrogen peroxide synthesis, including: Before the continuous synthesis of hydrogen peroxide, the design of the solar cell drive is carried out first; The solar cell uses a perovskite-silicon tandem solar cell or a dye-sensitized solar cell, with a spectral response range covering 300 - 1100 nm and a photoelectric conversion efficiency range of 20 - 25%; the battery array is configured in series / parallel to match the working voltage and current density of the electrocatalytic reactor, with a voltage range of 1.5 - 3V and a current density range of 10 - 50 mA / cm²; The electrocatalytic reactor uses a flow-through electrocatalytic reactor, which includes an anode chamber and a cathode chamber, separated by a proton exchange membrane in the middle. The cathode chamber is filled with graphite carbon felt or a carbon-based material as the working electrode, and the anode chamber uses a platinum mesh or a titanium-based oxide as the counter electrode; The graphite carbon felt and carbon-based materials are subjected to material pretreatment. Among them, the pretreatment of the graphite carbon felt is as follows: pyrolyzing the phenolic resin precursor in an inert gas at 800 - 1000 °C to form a porous structure, and doping nitrogen, cobalt or iron through chemical vapor deposition; the pretreatment of the carbon-based materials is as follows: reducing the graphene oxide dispersion in hydroiodic acid to obtain highly conductive reduced graphene oxide, mixing the reduced graphene oxide with thiourea or ammonia water, and performing high-temperature annealing to achieve sulfur / nitrogen doping; The treated graphite carbon felt and carbon-based materials are cut into sheets of 3 cm × 5 cm, fixed on a titanium current collector, and the catalyst is coated on the surface of the carbon cloth using polytetrafluoroethylene adhesive, with the loading amount controlled at 2 - 5 mg / cm².

[0016] Preferably, at night, the electrocatalytic technology and electrocatalytic materials are driven by a solar cell for continuous synthesis of hydrogen peroxide, and it also includes: After the treatment of the graphite carbon felt and carbon-based materials is completed, the reaction conditions for continuous synthesis of hydrogen peroxide are controlled; Among them, first, the electrolyte is prepared. An acidic solution containing 0.1 M Na 2 SO 4 is introduced into the cathode chamber, and pure oxygen is continuously introduced as the oxygen source; 0.5 M H 2 SO 4 solution is filled in the anode chamber for proton conduction; The solar cell system is turned on, and the photocurrent is introduced into the electrocatalytic reactor. The cathode potential is controlled at -0.5 - 0.8 V to promote the two-electron oxygen reduction reaction, and the current density is monitored in real time; Finally, continuous synthesis of hydrogen peroxide from the electrocatalytic material is obtained.

[0017] Preferably, the concentration of the synthesized hydrogen peroxide is monitored and analyzed respectively, and the inhibitory effect of hydrogen peroxide on algae in water is evaluated according to the analysis results, including: The synthesis of hydrogen peroxide by photocatalysis is a daytime treatment process, and the continuous synthesis of hydrogen peroxide by electrocatalytic materials is a nighttime treatment process; The concentration of hydrogen peroxide in the daytime treatment process and the nighttime treatment process is monitored respectively; Among them, the ultraviolet-visible spectroscopy method is used to measure the concentration of hydrogen peroxide in both the daytime treatment process and the nighttime treatment process; the daytime treatment process uses an optical sensor for real-time monitoring; the nighttime treatment process uses the current density for real-time monitoring; The inhibitory effect of hydrogen peroxide on algae in water is evaluated according to the real-time monitoring results of the daytime treatment process and the nighttime treatment process; Artificially cultivated algae are used as water samples, and the hydrogen peroxide synthesized in the daytime treatment process and the nighttime treatment process is added to different algae water samples respectively; Monitor the growth of algae in the daytime treatment process and the nighttime treatment process, including chlorophyll a concentration determination, cell counting, and photosynthetic activity determination; Analyze the monitoring data of the growth of algae. First, analyze the change of the algae growth inhibition rate under different hydrogen peroxide concentrations, and then analyze the change of the algae growth inhibition rate under different treatment times. Evaluate the inhibitory effect of hydrogen peroxide on algae according to different concentrations and times.

[0018] Preferably, according to the inhibitory effect of hydrogen peroxide on algae in water, evaluate the economic benefits and environmental benefits, including: Conduct an economic benefit assessment according to the inhibitory effect of hydrogen peroxide on algae. The economic benefit assessment includes cost analysis and revenue analysis; Construct an economic benefit model based on cost analysis and revenue analysis, obtain key parameters according to the economic benefit model, and conduct sensitivity analysis. After sensitivity analysis, obtain the economic benefit assessment data of photocatalytic synthesis of hydrogen peroxide for algae control; Conduct an environmental benefit assessment according to the inhibitory effect of hydrogen peroxide on algae. The environmental benefit assessment includes environmental friendliness assessment, inhibitory environment assessment, and ecosystem restoration assessment; Establish an environmental benefit model based on environmental friendliness assessment, inhibitory environment assessment, and ecosystem restoration assessment, and obtain the environmental benefit assessment data of photocatalytic synthesis of hydrogen peroxide for algae control according to the environmental benefit model; Finally, generate a visual report of the economic benefit assessment data and the environmental benefit assessment data.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The process of photocatalytic synthesis of hydrogen peroxide for algae control provided by the present invention can further enhance its ability to absorb and convert sunlight by optimizing the structure and composition of the photocatalytic material. By precisely controlling the reaction conditions and optimizing the catalyst structure, a highly selective two-electron oxygen reduction reaction can be achieved to generate H 2 O 2 .

[0020] 2. The process of photocatalytic synthesis of hydrogen peroxide for algae control provided by the present invention pre-treats graphite carbon felt and carbon-based materials. Through steps such as pyrolysis, chemical vapor deposition, reduction, and doping, the structure and performance of the catalyst are improved, and its catalytic activity and stability are enhanced. By configuring a specific electrolyte, introducing pure oxygen as the oxygen source, and controlling the cathode potential and other measures, precise control of the reaction conditions is achieved.

[0021] 3. The process of photocatalytic synthesis of hydrogen peroxide for algae resistance provided by the present invention. The daytime treatment process (photocatalytic synthesis of hydrogen peroxide) and the nighttime treatment process (continuous synthesis of hydrogen peroxide by electrocatalytic materials) can provide timely and accurate data, which helps to quickly adjust the treatment parameters and ensure the treatment effect. It not only analyzes the changes in the algae growth inhibition rate at different hydrogen peroxide concentrations, but also analyzes the changes in the algae growth inhibition rate at different treatment times. This in-depth data analysis helps to more comprehensively understand the inhibitory effect of hydrogen peroxide on algae and its influencing factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the steps for photocatalytic synthesis of hydrogen peroxide for algae resistance of the present invention.

[0023] Figure 2 It is a schematic diagram of the process for photocatalytic synthesis of hydrogen peroxide for algae resistance of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To solve the problem in the prior art that there is no more perfect selection and treatment of photocatalytic materials and electrocatalytic materials, resulting in poor synthesis effects, please refer to Figure 1 and Figure 2 , an embodiment of the present invention provides the following technical solutions: The process of photocatalytic synthesis of hydrogen peroxide for algae resistance includes: Prepare the photocatalytic material and the electrocatalytic material. During the day, use solar energy and the photocatalytic material to synthesize hydrogen peroxide. At night, use a solar cell to drive the electrocatalytic technology and the electrocatalytic material to continuously synthesize hydrogen peroxide; Monitor and analyze the concentration of the synthesized hydrogen peroxide respectively. Evaluate the inhibitory effect of hydrogen peroxide on algae in the water according to the analysis results. Finally, evaluate the economic benefits and environmental benefits according to the inhibitory effect of hydrogen peroxide on algae in the water, and generate an evaluation report.

[0025] Specifically, the photocatalytic material can use solar energy to synthesize hydrogen peroxide without an external power source, so the energy consumption is low. Solar energy is a sustainable and renewable energy source. Using solar energy for photocatalytic synthesis of hydrogen peroxide can reduce the dependence on fossil fuels. By monitoring and analyzing the concentration of hydrogen peroxide and evaluating according to its inhibitory effect on algae in the water, the process parameters can be optimized to improve economic benefits. As an environmentally friendly disinfectant and algae inhibitor, the use of hydrogen peroxide can reduce the dependence on traditional chemical disinfectants and is beneficial to environmental protection.

[0026] Preparing the photocatalytic material and the electrocatalytic material includes: The photocatalytic material is graphitic carbon nitride and D-A structure conjugated polymer; Graphitic carbon nitride is synthesized by thermal polymerization reaction, and the reaction conditions are adjusted to optimize the photocatalytic performance. The reaction conditions include temperature, time, and raw material ratio; The D-A structure conjugated polymer connects electron-rich and electron-deficient molecules through high-temperature hydrothermal synthesis or polycondensation reaction, and adjusts the reaction parameters to obtain the structure and performance; The electrocatalytic materials are graphite carbon felt and carbon-based materials; Graphite carbon felt derives carbon materials by pyrolyzing phenolic resin, and optimizes the catalytic performance by doping nitrogen, cobalt, and iron; The carbon-based materials improve the active sites in the electrocatalytic reaction by using chemical modification methods, and the chemical modification methods include reducing graphene oxide or doping heteroatoms.

[0027] Specifically, graphitic carbon nitride is cheap and easy to obtain, and has the advantages of high nitrogen content, stable physical and chemical properties, and visible light response. By adjusting the temperature, time, and raw material ratio of the thermal polymerization reaction, its photocatalytic performance can be optimized, such as increasing the specific surface area, improving the light absorption ability, and carrier separation efficiency, etc. The D-A structure conjugated polymer has excellent optoelectronic properties and photocatalytic activity, can absorb light energy and excite electrons, and then produce hydrogen, etc. By high-temperature hydrothermal synthesis or polycondensation reaction, connecting electron-rich and electron-deficient molecules can adjust its structure and performance. Reasonable molecular structure design, doping and modification, and preparation process optimization can further improve its photocatalytic hydrogen production performance. Deriving carbon materials by pyrolyzing phenolic resin has a high specific surface area and good thermal stability. By doping elements such as nitrogen, cobalt, and iron, its catalytic performance can be optimized, improving the reaction activity and selectivity. Using chemical modification methods (such as reducing graphene oxide or doping heteroatoms) can increase the number and quality of active sites in the electrocatalytic reaction. By optimizing the catalyst design and reaction conditions, efficient chemical reactions can be achieved and the energy utilization efficiency can be improved.

[0028] To solve the problem in the prior art that the anti-algal treatment of hydrogen peroxide is not separately treated during the day and at night according to the actual situation, resulting in poor anti-algal effect of hydrogen peroxide, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions: During the day, solar energy and photocatalytic materials are used for hydrogen peroxide synthesis, including: First, graphitic carbon nitride and the D-A structure conjugated polymer are synthesized. Among them, the synthesis process of graphitic carbon nitride is: Graphitic carbon nitride is operated by the thermal polymerization reaction method, using melamine or urea as a precursor, calcining in an inert gas at 550 - 600 °C for 2 - 4 hours to form layered graphitic carbon nitride; the polymerization temperature of the layered graphitic carbon nitride is reduced, and thiourea or melamine trithiocyanate is introduced to form sulfur-doped graphitic carbon nitride. Finally, the sulfur-doped graphitic carbon nitride is compounded with titanium dioxide and bismuth vanadate to obtain synthetic graphitic carbon nitride; The synthesis process of the D - A structure conjugated polymer is as follows: The D - A structure conjugated polymer is operated by the hydrothermal method at high temperature. The electron-rich unit and the electron-deficient unit are mixed in a solvent and reacted at 180 - 200 °C for 12 - 24 hours to form a D - A alternating copolymer. The donor and acceptor monomers are connected by coupling or reaction, and the ratio is adjusted to optimize the light absorption and carrier mobility. Then, carboxyl or sulfonic acid groups are introduced to enhance the hydrophilicity to obtain the synthetic D - A structure conjugated polymer.

[0029] After both graphitic carbon nitride and the D - A structure conjugated polymer are synthesized, the photocatalytic reactor is designed; The structure of the photocatalytic reactor is as follows: an open trough reactor or a thin film reactor is used, covered with a light-transmitting material and allowing full-spectrum sunlight to penetrate. And the open trough reactor or the thin film reactor is internally provided with a porous carrier to load the photocatalytic material, forming an immobilized catalyst layer. The porous carrier includes nickel foam or carbon cloth; The control conditions of the photocatalytic reactor include light intensity, solution system, and oxygen supply. The light intensity is controlled by a solar simulator or natural light; the solution system uses deionized water as a solvent, adding a small amount of ethanol (0.5 - 1 vol%) as a hole sacrificial agent to inhibit electron-hole recombination; the oxygen supply is continuously introduced with air or pure oxygen through an aeration device to provide O 2 as an electron acceptor; The photocatalytic reactor excites the synthesized graphitic carbon nitride and D - A structure conjugated polymer, generating electrons and holes after excitation; Then, the internal electric field formed by the heterojunction or doping accelerates the charge separation, and the electrons migrate to the catalyst surface to participate in the reduction reaction; According to the generation path of hydrogen peroxide obtained from the reduction reaction, the generation path includes a two-electron oxygen reduction reaction and hole consumption; According to the generation path, the synthesized hydrogen peroxide of the photocatalytic material is obtained.

[0030] Specifically, using solar energy as the energy source, with O 2 and H 2 O as raw materials, hydrogen peroxide (H 2 O 2 ) is synthesized through the photocatalytic material. No toxic by-products are generated in this process, only H 2 O and O2 , meeting environmental protection requirements. At the same time, solar energy is the cleanest and most abundant renewable energy source, so this solution is of great significance for achieving sustainable development. Through the designed photocatalytic reactor, the full-spectrum sunlight can be fully utilized for catalytic reactions, improving the utilization efficiency of solar energy. In addition, by optimizing the structure and composition of the photocatalytic material, its absorption and conversion ability of sunlight can be further enhanced. By precisely controlling the reaction conditions and optimizing the catalyst structure, a highly selective two-electron oxygen reduction reaction can be achieved to generate H 2 O 2 . At the same time, the photocatalytic material in this solution has high catalytic activity, and a relatively high H 2 O 2 production rate can be achieved. Hydrogen peroxide is an environmentally friendly oxidant and has been widely used in fields such as organic synthesis, fuel cells, medical disinfection, and environmental remediation. This solution provides new technical support for the green production of hydrogen peroxide and has broad application prospects.

[0031] Specifically, reducing the polymerization temperature of layered graphitic carbon nitride includes: Extracting the cooling stage at which the polymerization temperature of the current layered graphitic carbon nitride is cooled down; Extracting the basic cooling gradient corresponding to the cooling stage from the database; Extracting the layer thickness of the layered graphitic carbon nitride; Comparing the layer thickness of the layered graphitic carbon nitride with a preset thickness reference value; When the layer thickness of the layered graphitic carbon nitride does not exceed the preset thickness reference value, the polymerization temperature of the layered graphitic carbon nitride is reduced using the basic cooling gradient corresponding to the cooling stage; When the layer thickness of the layered graphitic carbon nitride exceeds the preset thickness reference value, the material parameters of the layered graphitic carbon nitride are retrieved; Adjusting the basic cooling gradient using the material parameters of the layered graphitic carbon nitride to obtain an adjusted cooling gradient; Reducing the polymerization temperature of the layered graphitic carbon nitride using the adjusted cooling gradient.

[0032] The technical effects of the above technical solution are as follows: By extracting the temperature reduction stage at which the polymerization temperature of the current layered graphitic carbon nitride is located and obtaining the corresponding basic temperature reduction gradient from the database, it is possible to ensure that there is a benchmark and verified temperature reduction rate during the temperature reduction process, thereby improving the accuracy of temperature control. By comparing the layer thickness of the layered graphitic carbon nitride with a preset thickness reference value, adaptive adjustment can be made for materials with different thicknesses. This flexibility ensures that the most suitable temperature reduction strategy can be found regardless of the material thickness. When the layer thickness does not exceed the preset reference value and further fine adjustment is required, by retrieving the material parameters of the layered graphitic carbon nitride (such as thermal conductivity, coefficient of thermal expansion, etc.), the basic temperature reduction gradient can be finely adjusted to better match the physical properties of the material. This adjustment based on material parameters helps to optimize the performance of the final product, such as improving the stability, strength, and durability of the material. Using the adjusted temperature reduction gradient for temperature reduction can ensure that the temperature reduction process is more stable and controllable, reducing the degradation of material properties or product defects caused by temperature fluctuations. This helps to improve production efficiency and product quality and reduce the scrap rate. The technical solution can integrate advanced sensors and control systems to monitor and adjust the temperature reduction process in real time, further improving the controllability and efficiency of the production process.

[0033] Specifically, using the material parameters of the layered graphitic carbon nitride to adjust the basic temperature reduction gradient and obtain the adjusted temperature reduction gradient includes: Extracting the material parameters of the layered graphitic carbon nitride, where the material parameters of the layered graphitic carbon nitride include material thermal conductivity, layer thickness, density of layered graphitic carbon nitride, and specific heat capacity; Retrieving the decomposition activation energy (J / mol) of the sulfur dopant corresponding to thiourea or trithiocyanuric acid; Using the material parameters of the layered graphitic carbon nitride in combination with the decomposition activation energy of the sulfur dopant corresponding to thiourea or trithiocyanuric acid to obtain a temperature reduction gradient adjustment coefficient (dimensionless); Among them, the temperature reduction gradient adjustment coefficient is obtained through the following formula:

[0034] Among them, Q represents the temperature reduction gradient adjustment coefficient; E a represents the decomposition activation energy of the sulfur dopant; L represents the layer thickness of the layered graphitic carbon nitride; ρ represents the density of the layered graphitic carbon nitride; C represents the specific heat capacity of the layered graphitic carbon nitride; k represents the material thermal conductivity of the layered graphitic carbon nitride; R represents the ideal gas constant, with the unit J / (mol·K), and the value is taken as 8.314; Using the temperature reduction gradient adjustment coefficient to adjust the basic temperature reduction gradient to obtain the adjusted temperature reduction gradient; among them, the adjusted temperature reduction gradient is obtained through the following formula:

[0035] Among them, T x represents the adjusted cooling gradient; T 0 represents the basic cooling gradient; Q represents the cooling gradient adjustment coefficient.

[0036] The technical effects of the above technical solution are as follows: By comprehensively considering material parameters such as the material thermal conductivity, layer thickness, density, and specific heat capacity of layered graphitic carbon nitride, as well as the decomposition activation energy of the sulfur dopant corresponding to thiourea or trithiocyanuric acid, the cooling gradient adjustment coefficient is calculated to adjust the cooling gradient. It can accurately control the cooling process according to the material characteristics and reaction conditions, making the temperature change more in line with the process requirements, avoiding affecting the material performance or reaction process due to improper temperature control, and improving the product quality and production stability. The reasonable adjustment of the cooling gradient helps to optimize the reaction kinetics, enables the reaction to proceed at a suitable temperature change rhythm, reduces unnecessary reaction time loss, improves production efficiency, and reduces energy consumption costs. This solution can flexibly adjust the cooling gradient according to different material parameters and sulfur dopant decomposition activation energies, and can adapt to different batches, different characteristics of layered graphitic carbon nitride materials, and different reaction requirements, enhancing the adaptability and versatility of the process.

[0037] Physically speaking, the decomposition activation energy Ea of sulfur dopants reflects the energy threshold required for the decomposition reaction of sulfur dopants. The higher the activation energy, the less likely the reaction is to occur, and more appropriate temperature conditions are needed to promote the reaction. Therefore, it is an important influencing factor in the formula. The layer thickness L, density ρ, specific heat capacity C, and thermal conductivity k of layered graphitic carbon nitride comprehensively reflect the thermal properties of the material. The layer thickness and density affect the heat capacity of the material and the length of the heat transfer path; the specific heat capacity represents the amount of heat absorbed or released when the temperature of a unit mass of substance rises or falls by a unit degree, reflecting the heat storage capacity of the material; the thermal conductivity reflects the ability of the material to conduct heat. These parameters interact with each other and determine the performance of the material during heat transfer. In the formula, through a specific power combination, their comprehensive influence on the cooling gradient adjustment coefficient is reflected. The ideal gas constant R here serves as a normalization or proportional adjustment parameter to make the entire formula reasonable in terms of physical dimensions. Generally speaking, through the combination of various parameters, this formula quantifies the influence of material properties and reaction energy requirements on the cooling gradient adjustment coefficient. At the same time, during the preparation of sulfur-doped graphitic carbon nitride from layered graphitic carbon nitride, an appropriate cooling gradient can allow atoms to have enough time to arrange orderly at new lattice positions. If the cooling is too fast, the atoms do not have time to adjust their positions, and a crystal structure with more defects may be formed, affecting the material properties; while an accurate cooling gradient can promote the formation of a more regular crystal structure, improving the stability and electrical, optical and other properties of the material. When introducing thiourea or trithiocyanuric acid for sulfur doping, the cooling process affects the distribution of sulfur atoms in the lattice of graphitic carbon nitride. An appropriate cooling gradient can enable sulfur atoms to slowly and evenly integrate into the lattice, avoiding the agglomeration or uneven distribution of sulfur atoms caused by sudden temperature changes, ensuring doping uniformity, and then optimizing the chemical activity and catalytic performance of the material, etc. During the process of reducing the polymerization temperature and introducing sulfur dopants, an excessively high or unreasonable cooling rate may trigger unnecessary side reactions. An appropriate cooling gradient can enable the reaction system to gradually complete the reaction in a relatively stable temperature environment, reduce side reactions caused by temperature fluctuations, and improve the purity and yield of the target product. According to the cooling gradient calculated by the formula, the cooling rhythm can be accurately controlled based on material parameters and reaction activation energy. This helps to provide a suitable temperature environment at different reaction stages. For example, in the initial stage of the reaction, faster cooling may be required to inhibit some excessive reactions, and slower cooling is needed in the later stage to allow the product to fully crystallize, thus better controlling the entire reaction process. Good repeatability of cooling gradient control can ensure the consistency of process conditions every time sulfur-doped graphitic carbon nitride is prepared, improve the stability of the production process, reduce product quality fluctuations, and reduce the defective rate. A reasonable cooling gradient avoids unnecessary temperature adjustments and energy waste. It neither consumes too much energy due to excessive cooling nor requires reprocessing due to abnormal reactions caused by insufficient cooling, achieving energy conservation and consumption reduction and reducing production costs.

[0038] On the other hand, by comprehensively considering multiple material parameters of layered graphitic carbon nitride (such as thermal conductivity, layer thickness, density, and specific heat capacity) and the decomposition activation energy of sulfur dopants, this technical solution can more precisely adjust the cooling gradient to meet the requirements under different materials and doping conditions. This precision and adaptability help improve the temperature control level during the material preparation process. The precise adjustment of the cooling gradient helps optimize the microstructure and properties of layered graphitic carbon nitride. By reasonably controlling the cooling rate, the internal thermal stress and defects of the material can be reduced, thereby improving the stability, strength, and durability of the material. In addition, the introduction of sulfur dopants may also bring additional performance improvements, such as enhancing the conductivity or catalytic activity of the material. By precisely controlling the cooling gradient, the degradation of material properties or product defects caused by temperature fluctuations can be reduced. This helps improve production efficiency and product quality, and reduce the rejection rate and production costs. At the same time, precise temperature control also helps shorten the preparation cycle and improve the overall production efficiency. This technical solution incorporates scientific factors such as material parameters and dopant decomposition activation energy into the adjustment process of the cooling gradient, enhancing the scientific nature and controllability of material preparation. This preparation method based on scientific principles helps promote the research and application development of layered graphitic carbon nitride materials.

[0039] The continuous synthesis of hydrogen peroxide at night using solar cell-driven electrocatalytic technology and electrocatalytic materials includes: Design the solar cell drive before the continuous synthesis of hydrogen peroxide. The solar cell uses a perovskite-silicon tandem solar cell or a dye-sensitized solar cell, with a spectral response range covering 300 - 1100 nm and a photoelectric conversion efficiency range of 20 - 25%; the battery array matches the working voltage and current density of the electrocatalytic reactor through series / parallel configuration, with a voltage range of 1.5 - 3 V and a current density range of 10 - 50 mA / cm². The electrocatalytic reactor uses a flow-through electrocatalytic reactor, which includes an anode chamber and a cathode chamber, separated by a proton exchange membrane in the middle. The cathode chamber is filled with graphite carbon felt or a carbon-based material as the working electrode, and the anode chamber uses a platinum mesh or a titanium-based oxide as the counter electrode. Pre-treat the graphite carbon felt and the carbon-based material. Among them, the pre-treatment of the graphite carbon felt is: pyrolyzing the phenolic resin precursor at 800 - 1000 °C in an inert gas to form a porous structure, and doping nitrogen, cobalt, or iron through chemical vapor deposition; the pre-treatment of the carbon-based material is: reducing the graphene oxide dispersion in hydroiodic acid to obtain highly conductive reduced graphene oxide, mixing the reduced graphene oxide with thiourea or ammonia water, and performing high-temperature annealing to achieve sulfur / nitrogen doping. The processed graphite carbon felt and carbon-based materials were cut into sheets of 3 cm × 5 cm, fixed on titanium current collectors, and the catalyst was coated onto the surface of the carbon cloth using polytetrafluoroethylene adhesive, with the loading controlled at 2 - 5 mg / cm².

[0040] After the treatment of the graphite carbon felt and carbon-based materials, the reaction conditions for the continuous synthesis of hydrogen peroxide were controlled. Among them, the electrolyte was first prepared. An acidic solution containing 0.1 M Na 2 SO 4 was introduced into the cathode chamber, and pure oxygen was continuously introduced as the oxygen source. The anode chamber was filled with 0.5 M H 2 SO 4 solution for proton conduction. The solar cell system was turned on, and the photocurrent was introduced into the electrocatalytic reactor. The cathode potential was controlled at -0.5 - 0.8 V to promote the two-electron oxygen reduction reaction, and the current density was monitored in real time. Finally, continuously synthesized hydrogen peroxide of the electrocatalytic material was obtained.

[0041] Specifically, a perovskite-silicon tandem solar cell or a dye-sensitized solar cell was used as the driving source. These cells have a wide spectral response range (300 - 1100 nm) and a high photoelectric conversion efficiency (20 - 25%), and can efficiently convert solar energy into electrical energy, providing a stable and continuous energy input for the electrocatalytic reaction. The solar cell array can be configured in series / parallel to flexibly match the working voltage and current density requirements of the electrocatalytic reactor, ensuring that the reaction process proceeds under optimal conditions. This flexibility helps to improve the overall efficiency and stability of the system. The flow-through electrocatalytic reactor separates the anode chamber and the cathode chamber through a proton exchange membrane, effectively avoiding direct mass exchange between the electrodes and improving the selectivity and efficiency of the reaction. At the same time, the graphite carbon felt or carbon-based material filled in the cathode chamber serves as the working electrode, having good electrical conductivity and catalytic activity, which helps to promote the generation of hydrogen peroxide. The graphite carbon felt and carbon-based materials were pretreated through steps such as pyrolysis, chemical vapor deposition, reduction, and doping, improving the structure and performance of the catalyst and enhancing its catalytic activity and stability. This optimized treatment helps to extend the service life of the catalyst and reduce production costs. By configuring a specific electrolyte, introducing pure oxygen as the oxygen source, and controlling the cathode potential and other measures, precise control of the reaction conditions was achieved. This precise control helps to ensure the efficient and stable progress of the reaction process and improve the yield and purity of hydrogen peroxide.

[0042] The concentration of the synthesized hydrogen peroxide was monitored and analyzed respectively, and the inhibitory effect of hydrogen peroxide on algae in water was evaluated according to the analysis results, including: The photocatalytically synthesized hydrogen peroxide is a daytime treatment process, and the continuously synthesized hydrogen peroxide of the electrocatalytic material is a nighttime treatment process. Monitor the hydrogen peroxide concentration in the daytime treatment process and the nighttime treatment process respectively; Among them, the ultraviolet-visible spectroscopy method is used to measure the hydrogen peroxide concentration in both the daytime treatment process and the nighttime treatment process; the optical sensor is used for real-time monitoring in the daytime treatment process; the current density is used for real-time monitoring in the nighttime treatment process; Evaluate the inhibitory effect of hydrogen peroxide on algae in water according to the real-time monitoring results of the daytime treatment process and the nighttime treatment process; Use artificially cultivated algae as water samples, and add the hydrogen peroxide synthesized in the daytime treatment process and the nighttime treatment process to different algae water samples respectively; Monitor the growth of algae in the daytime treatment process and the nighttime treatment process, including the determination of chlorophyll a concentration, cell counting, and photosynthetic activity determination; Analyze the monitoring data of the growth of algae. First, analyze the change of the algae growth inhibition rate under different hydrogen peroxide concentrations, and then analyze the change of the algae growth inhibition rate under different treatment times. Evaluate the inhibitory effect of hydrogen peroxide on algae according to different concentrations and times.

[0043] Specifically, the daytime treatment process (photocatalytic synthesis of hydrogen peroxide) and the nighttime treatment process (electrocatalytic material continuous synthesis of hydrogen peroxide) are clearly distinguished. This helps to select the appropriate treatment process according to the characteristics of different time periods and improve the treatment efficiency. The optical sensor is used for real-time monitoring of the hydrogen peroxide concentration in the daytime treatment process, while the current density is used for real-time monitoring in the nighttime treatment process. Both methods can provide timely and accurate data, which helps to quickly adjust the treatment parameters and ensure the treatment effect. The ultraviolet-visible spectroscopy method is used to measure the hydrogen peroxide concentration. This method has the characteristics of high sensitivity and good accuracy, and can accurately reflect the actual concentration of hydrogen peroxide. Using artificially cultivated algae as water samples can exclude the interference of other factors in the natural environment and more accurately evaluate the inhibitory effect of hydrogen peroxide on algae. At the same time, adding the hydrogen peroxide synthesized in the daytime treatment process and the nighttime treatment process to different algae water samples respectively can compare the treatment effects of the two processes. The monitoring of the growth of algae includes multiple aspects such as the determination of chlorophyll a concentration, cell counting, and photosynthetic activity determination. These indicators can comprehensively reflect the growth state of algae, so as to more accurately evaluate the inhibitory effect of hydrogen peroxide. Not only the change of the algae growth inhibition rate under different hydrogen peroxide concentrations is analyzed, but also the change of the algae growth inhibition rate under different treatment times is analyzed. This in-depth data analysis helps to more comprehensively understand the inhibitory effect of hydrogen peroxide on algae and its influencing factors.

[0044] To solve the problem in the prior art that there is no effective economic benefit and environmental benefit analysis of the final inhibitory effect, resulting in the inability to solve the inhibitory effect problem targeted, please refer toFigure 1 and Figure 2 , this embodiment provides the following technical solutions: Based on the inhibitory effect of hydrogen peroxide on algae in water bodies, economic and environmental benefits are evaluated, including: Conduct an economic benefit evaluation based on the inhibitory effect of hydrogen peroxide on algae. The economic benefit evaluation includes cost analysis and benefit analysis; Construct an economic benefit model based on cost analysis and benefit analysis, obtain key parameters according to the economic benefit model, and conduct sensitivity analysis. After sensitivity analysis, obtain the economic benefit evaluation data of photocatalytic synthesis of hydrogen peroxide for anti-algae; Conduct an environmental benefit evaluation based on the inhibitory effect of hydrogen peroxide on algae. The environmental benefit evaluation includes environmental friendliness evaluation, inhibitory environment evaluation, and ecosystem restoration evaluation; Establish an environmental benefit model based on environmental friendliness evaluation, inhibitory environment evaluation, and ecosystem restoration evaluation, and obtain the environmental benefit evaluation data of photocatalytic synthesis of hydrogen peroxide for anti-algae according to the environmental benefit model; Finally, generate a visual report with the economic benefit evaluation data and the environmental benefit evaluation data.

[0045] Specifically, it covers two major aspects of economic and environmental benefits, ensuring the comprehensiveness of the evaluation. The economic benefit evaluation quantifies the economic feasibility of hydrogen peroxide for anti-algae through cost analysis and benefit analysis, while the environmental benefit evaluation focuses on its long-term impact on the environment. In the economic benefit evaluation, an economic benefit model is constructed, and key parameters are identified through sensitivity analysis, improving the scientificity and accuracy of the evaluation. Similarly, an environmental benefit model is established in the environmental benefit evaluation, comprehensively considering based on multiple environmental indicators, focusing on the inhibitory effect of hydrogen peroxide on algae, and having strong pertinence. Algal blooms are environmental problems faced by many water bodies. This solution provides a scientific basis for practical applications by specifically evaluating the anti-algae effect of hydrogen peroxide. Introducing photocatalytic synthesis of hydrogen peroxide as an anti-algae means is innovative. Photocatalytic technology is an environmentally friendly and efficient technology. Using the synthesized hydrogen peroxide for anti-algae not only reduces the use of chemical agents but also improves the treatment efficiency. Finally, a visual report is generated, which is convenient for understanding and application. The visual report can intuitively display the evaluation results of economic and environmental benefits, providing strong support for decision-makers.

[0046] The above relevant descriptions and the description of the embodiment are for the convenience of those of ordinary skill in the art to understand and apply the present invention. Those familiar with the technology in this field can obviously make various modifications to these contents easily and apply the general principles described here to other embodiments without creative labor. Therefore, the present invention is not limited to the above relevant descriptions and the description of the embodiment. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A process for photocatalytic synthesis of hydrogen peroxide to resist algae, characterized in that: include: Prepare photocatalytic materials and electrocatalytic materials, use solar energy and photocatalytic materials to synthesize hydrogen peroxide during the day, and use solar cells to drive electrocatalytic technology and electrocatalytic materials to continuously synthesize hydrogen peroxide at night; Monitor and analyze the concentration of synthesized hydrogen peroxide respectively, evaluate the inhibitory effect of hydrogen peroxide on algae in water bodies according to the analysis results, and finally evaluate the economic and environmental benefits according to the inhibitory effect of hydrogen peroxide on algae in water bodies, and generate an evaluation report; During the day, solar energy and photocatalytic materials are used to synthesize hydrogen peroxide, wherein the photocatalytic materials are graphite phase carbon nitride and DA structure conjugated polymers, and further include: After the graphite phase carbon nitride and DA structure conjugated polymer were synthesized, the photocatalytic reactor was designed; The structure of the photocatalytic reactor is: an open tank reactor or a thin film reactor is used to cover the light-transmitting material and allow full-spectrum sunlight to penetrate, and the open tank reactor or the thin film reactor is built with a porous carrier to load the photocatalytic material to form a fixed catalyst layer, and the porous carrier includes nickel foam or carbon cloth; The control conditions of the photocatalytic reactor include light intensity, solution system and oxygen supply. The light intensity is controlled by using a solar simulator or natural light. The solution system uses deionized water as the solvent, and ethanol (0.5-1vol%) is added as a hole sacrificial agent to inhibit electron-hole recombination. The oxygen supply is provided by continuously introducing air or pure oxygen through an aeration device to provide O2 as an electron acceptor.

2. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 1, characterized in that: The photocatalytic material and the electrocatalytic material are prepared, including: The graphite phase carbon nitride is synthesized by thermal polymerization, and the photocatalytic performance is optimized by adjusting the reaction conditions, including temperature, time and raw material ratio; DA structured conjugated polymers are synthesized at high temperature or by polycondensation to connect electron-rich and electron-deficient molecules, and the structure and properties are obtained by adjusting the reaction parameters; The electrocatalytic materials are graphite carbon felt and carbon-based materials; Graphite carbon felt is derived from carbon materials by pyrolysis of phenolic resin, and its catalytic performance is optimized by doping with nitrogen, cobalt and iron; Carbon-based materials have been shown to improve the active sites in electrocatalytic reactions by using chemical modification methods, such as reducing graphene oxide or doping with heteroatoms.

3. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 2, characterized in that: The use of solar energy and photocatalytic materials to synthesize hydrogen peroxide during the day includes: First, graphite phase carbon nitride and DA structure conjugated polymer are synthesized, wherein the synthesis process of graphite phase carbon nitride is as follows: The graphite phase carbon nitride is operated by a thermal polymerization method, using melamine or urea as a precursor, and calcined in an inert gas at 550-600° C. for 2-4 hours to form a layered graphite phase carbon nitride; the polymerization temperature of the layered graphite phase carbon nitride is lowered, and thiourea or trithiocyanate is introduced to form sulfur-doped graphite phase carbon nitride, and finally the sulfur-doped graphite phase carbon nitride is compounded with titanium dioxide and bismuth vanadate to obtain a synthetic graphite phase carbon nitride; The synthesis process of DA structure conjugated polymer is as follows: The DA structure conjugated polymer is operated by a high-temperature hydrothermal method. The electron-rich unit and the electron-deficient unit are mixed in a solvent and reacted at 180-200°C for 12-24 hours to form a DA alternating copolymer. The donor and acceptor monomers are connected by coupling or reaction, the ratio is adjusted to optimize light absorption and carrier mobility, and then a carboxyl group or a sulfonic acid group is introduced to enhance hydrophilicity to obtain a synthetic DA structure conjugated polymer.

4. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 3, characterized in that: The polymerization temperature of the layered graphite phase carbon nitride is lowered, including: Extract the cooling stage of the current polymerization temperature of the layered graphite phase carbon nitride; Extracting the basic cooling gradient corresponding to the cooling stage from the database; Extracting the layer thickness of layered graphite phase carbon nitride; comparing the layer thickness of the layered graphite phase carbon nitride with a preset thickness reference value; When the layer thickness of the layered graphite phase carbon nitride does not exceed the preset thickness reference value, the polymerization temperature of the layered graphite phase carbon nitride is reduced by using the basic cooling gradient corresponding to the cooling stage; When the layer thickness of the layered graphite phase carbon nitride exceeds the preset thickness reference value, the material parameters of the layered graphite phase carbon nitride are retrieved; Using the material parameters of the layered graphite phase carbon nitride to adjust the basic cooling gradient, and obtain an adjusted cooling gradient; The polymerization temperature of the layered graphite phase carbon nitride is reduced by using an adjusted temperature-lowering gradient.

5. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 4, characterized in that: The basic temperature reduction gradient is adjusted by using the material parameters of the layered graphite phase carbon nitride to obtain the adjusted temperature reduction gradient, including: Extracting material parameters of the layered graphite phase carbon nitride, wherein the material parameters of the layered graphite phase carbon nitride include material thermal conductivity, layer thickness, layered graphite phase carbon nitride density and specific heat capacity; Retrieving the decomposition activation energy of the sulfur dopant corresponding to thiourea or thiocyanate; The temperature reduction gradient adjustment coefficient is obtained by combining the material parameters of the layered graphite phase carbon nitride with the decomposition activation energy of the sulfur dopant corresponding to thiourea or trithiocyanate; The basic cooling gradient is adjusted using the cooling gradient adjustment coefficient to obtain an adjusted cooling gradient.

6. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 5, characterized in that: The use of solar energy and photocatalytic materials to synthesize hydrogen peroxide during the day also includes: The photocatalytic reactor excites the synthesized graphite phase carbon nitride and DA structure conjugated polymer, and generates electrons and holes after excitation; Then, the internal electric field formed by heterojunction or doping accelerates charge separation, and the electrons migrate to the catalyst surface to participate in the reduction reaction; The generation pathway of hydrogen peroxide is obtained according to the reduction reaction, and the generation pathway includes a two-electron oxygen reduction reaction and hole consumption; The synthetic hydrogen peroxide of the photocatalytic material is obtained according to the generation path.

7. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 6, characterized in that: At night, the electrocatalytic technology and electrocatalytic materials driven by solar cells are used to continuously synthesize hydrogen peroxide, including: Design the solar cell drive before continuously synthesizing hydrogen peroxide; The solar cells use perovskite-silicon stacked solar cells or dye-sensitized solar cells, with a spectral response range of 300-1100nm and a photoelectric conversion efficiency range of 20-25%. The battery array is configured in series / parallel to match the operating voltage and current density of the electrocatalytic reactor, with a voltage range of 1.5-3V and a current density range of 10-50 mA / cm². The electrocatalytic reactor adopts a flow-type electrocatalytic reactor, which includes an anode chamber and a cathode chamber separated by a proton exchange membrane. The cathode chamber is filled with graphite carbon felt or carbon-based materials as a working electrode, and the anode chamber adopts platinum mesh or titanium-based oxide as a counter electrode. The graphite carbon felt and the carbon-based material are pretreated, wherein the graphite carbon felt is pretreated by pyrolyzing a phenolic resin precursor in an inert gas at 800-1000°C to carbonize it to form a porous structure, and then doping it with nitrogen, cobalt or iron by chemical vapor deposition; the carbon-based material is pretreated by reducing a graphene oxide dispersion in hydroiodic acid to obtain highly conductive reduced graphene oxide, mixing the reduced graphene oxide with thiourea or ammonia water, and annealing at high temperature to achieve sulfur / nitrogen doping; The treated graphite carbon felt and carbon-based materials were cut into 3cm×5cm sheets and fixed on the titanium current collector. The catalyst was coated on the surface of the carbon cloth using a polytetrafluoroethylene adhesive, and the loading amount was controlled to 2-5 mg / cm².

8. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 7, characterized in that: Using solar cells to drive electrocatalytic technology and electrocatalytic materials to continuously synthesize hydrogen peroxide at night, including: After the graphite carbon felt and carbon-based materials are processed, the reaction conditions for continuous synthesis of hydrogen peroxide are controlled; The electrolyte is first prepared, an acidic solution containing 0.1M Na2SO4 is introduced into the cathode chamber, and pure oxygen is continuously introduced as an oxygen source; the anode chamber is filled with 0.5M H2SO4 solution for proton conduction; Turn on the solar cell system, introduce the photogenerated current into the electrocatalytic reactor, control the cathode potential at -0.5-0.8V, promote the two-electron oxygen reduction reaction, and monitor the current density in real time; Finally, the continuous synthesis of hydrogen peroxide by electrocatalytic material is obtained.

9. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 8, characterized in that: The concentration of the synthesized hydrogen peroxide is monitored and analyzed respectively, and the inhibitory effect of hydrogen peroxide on algae in the water is evaluated based on the analysis results, including: Photocatalytic synthesis of hydrogen peroxide is a daytime treatment process, while continuous synthesis of hydrogen peroxide by electrocatalytic materials is a nighttime treatment process; The concentration of hydrogen peroxide in the daytime treatment process and the nighttime treatment process was monitored separately; Among them, both the daytime treatment process and the nighttime treatment process use ultraviolet-visible spectroscopy to measure the concentration of hydrogen peroxide; the daytime treatment process uses optical sensors for real-time monitoring; the nighttime treatment process uses current density for real-time monitoring; The inhibitory effect of hydrogen peroxide on algae in water bodies was evaluated based on the real-time monitoring results of the daytime treatment process and the nighttime treatment process; Artificially cultivated algae were used as water samples, and hydrogen peroxide synthesized in the daytime treatment process and the nighttime treatment process were added to different algae water samples respectively; Monitoring of algae growth during daytime and nighttime treatments, including chlorophyll a concentration, cell counts, and photosynthetic activity; The monitoring data of algae growth were analyzed. First, the changes in algae growth inhibition rate under different hydrogen peroxide concentrations were analyzed, and then the changes in algae growth inhibition rate under different treatment times were analyzed. The inhibitory effect of hydrogen peroxide on algae was evaluated according to different concentrations and times.

10. The process for photocatalytic synthesis of hydrogen peroxide for anti-algae according to claim 9, characterized in that: According to the inhibitory effect of hydrogen peroxide on algae in water bodies, the economic and environmental benefits are evaluated, including: The economic benefit evaluation is conducted based on the inhibitory effect of hydrogen peroxide on algae, which includes cost analysis and benefit analysis; An economic benefit model was constructed based on cost analysis and benefit analysis, key parameters were obtained based on the economic benefit model, and sensitivity analysis was performed. After the sensitivity analysis, economic benefit evaluation data of photocatalytic synthesis of hydrogen peroxide for anti-algae was obtained; An environmental benefit assessment is conducted based on the inhibitory effect of hydrogen peroxide on algae. The environmental benefit assessment includes environmental friendliness assessment, inhibitory environment assessment and ecosystem restoration assessment; An environmental benefit model was established based on environmental friendliness assessment, environmental inhibition assessment and ecosystem restoration assessment, and environmental benefit assessment data of photocatalytic synthesis of hydrogen peroxide for anti-algae was obtained based on the environmental benefit model; Finally, a visual report is generated for the economic benefit evaluation data and the environmental benefit evaluation data.

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