58 results about "Hydrogen peroxide generation" patented technology

The invention belongs to a photocatalysis technology, and particularly relates to a palladium-loaded gallium nitride nanowire photocatalyst as well as a preparation method and application thereof, and the palladium-loaded gallium nitride nanowire photocatalyst comprises a silicon substrate, a gallium nitride nanowire vertically grown on the silicon substrate and palladium nanoparticles uniformly loaded on the surface of the gallium nitride nanowire. Compared with the prior art, the problem that in the prior art, natural seawater cannot be used for photocatalytic decomposition for hydrogen and hydrogen peroxide is solved. According to the scheme, the limitation is solved by introducing the palladium-modified gallium nitride nanowire: the palladium nanoparticles serve as an efficient hole extractor, so that the adsorption of hydroxyl (* OH) is reduced, and the generation of hydrogen and hydrogen peroxide is accelerated; chloride ions in seawater further improve the catalytic performance by improving charge kinetics and reducing the energy barrier of the reaction.

The utility model provides a hydrogen peroxide preparation device and ceiling equipment with the same. The hydrogen peroxide preparation device comprises a hydrogen peroxide preparation assembly, wherein the hydrogen peroxide preparation assembly at least comprises an electrolysis assembly and a refrigeration assembly; and the pressing assembly is provided with a pressing space, the pressing space is used for containing the hydrogen peroxide preparation assembly, and the height of the pressing space is adjustable so that the hydrogen peroxide preparation assembly can be pressed to the target thickness. By applying the scheme, the refrigeration assembly can condense moisture in air, the electrolysis assembly electrolyzes condensed water to generate hydrogen peroxide, and the pressing space of the pressing assembly is used for containing the hydrogen peroxide preparation assembly and pressing the hydrogen peroxide preparation assembly to the target thickness, so that the internal resistance of the hydrogen peroxide preparation assembly is adjusted to the target size; therefore, the electrolysis assembly can generate large electrolysis current only through a small amount of condensate water, the hydrogen peroxide generation efficiency is higher, and the problem that in the prior art, the hydrogen peroxide preparation efficiency is low is solved.

The utility model discloses a gasified hydrogen peroxide supply device which comprises an evaporator, a hydrogen peroxide supply pipeline, a sterile air supply pipeline for atomization and a sterile hot air supply pipeline for gasification. The hydrogen peroxide supply pipeline and the sterile air supply pipeline for atomization are connected with the mist input end of the evaporator, the sterile hot air supply pipeline for gasification is connected with the hot air input end of the evaporator, and the gasified hydrogen peroxide supply device further comprises a descaling pipeline. The hydrogen peroxide evaporation path is covered with the descaling agent conveying path, it is guaranteed that the descaling agent makes contact with all dirt, the dirt is removed along the original gasified hydrogen peroxide generation path, the heat conduction efficiency of the evaporator is maintained, and the gasification quality of the whole gasified hydrogen peroxide supply device is guaranteed.

The invention provides a self-breathing anti-scaling cathode, a preparation method, an electrolytic bath and application of the electrolytic bath, and belongs to the technical field of electrochemical electrodes. The preparation method comprises the following steps: mixing a carbon substrate and a catalyst precursor solution, and carrying out first calcination on the mixed solution under a protective atmosphere to obtain an anti-scaling cathode; and the anti-scaling cathode is sprayed with a water repellent agent and then subjected to second calcination in an oxygen-containing atmosphere, and the self-breathing type anti-scaling cathode is obtained. On one hand, the oxygen mass transfer efficiency is improved through the self-breathing anti-scaling cathode, deposition of divalent ions such as Ca < 2 + > and Mg < 2 + > is inhibited, the generation capacity of hydrogen peroxide is remarkably enhanced, and the long-term operation stability is improved; on the other hand, a spatial hydrophobic microenvironment is provided, and the yield of H2O2 is increased under the condition that external air ventilation is not needed; meanwhile, due to the design of the hydrophobic anode, decomposition of H2O2 at the anode is reduced, and efficient and stable electrosynthesis of H2O2 for pollutant degradation is realized.

The invention relates to the technical field of hydrogen peroxide electrochemical preparation, in particular to a standing type critical plane electrochemical hydrogen peroxide generation device and a hydrogen peroxide preparation method and application thereof.The standing type critical plane electrochemical hydrogen peroxide generation device comprises a box body, the box body is provided with a containing cavity, and one side of the box body is provided with a box body opening, a cathode assembly close to the box body opening and an anode assembly away from the box body opening; the cathode assembly is provided with a hydrophobic breathable layer, the hydrophobic breathable layer is provided with an adjacent-phase interface reaction area communicated with the opening of the box body, one side of the adjacent-phase interface reaction area and air of the opening of the box body form a gas-solid critical plane, and the other side of the adjacent-phase interface reaction area and the electrolyte of the containing cavity form a solid-liquid critical plane. According to the invention, the adjacent phase interface reaction area is arranged, so that one side of the cathode assembly and air at the opening of the box body form a gas-solid critical plane, oxygen can be fully utilized by the cathode, and the other side of the adjacent phase interface reaction area and electrolyte in the accommodating cavity form a solid-liquid critical plane, so that the reaction can be continuously carried out; and continuous preparation of high-concentration products is ensured.

The invention belongs to the technical field of photocatalytic materials, and relates to an oxygen vacancy-enriched NiTiO3-coated Ni heterojunction photocatalyst and a preparation method and application thereof, and the preparation method comprises the following steps: (1) preparing a NiTiO3 precursor; and (2) preparing the NiTiO3 and Ni heterojunction photocatalyst rich in oxygen vacancy. The heterojunction photocatalyst can be applied to photocatalytic production of hydrogen peroxide. According to the NiTiO3-Ni composite visible-light-driven photocatalyst prepared by the method, due to the fact that the NiTiO3-Ni composite visible-light-driven photocatalyst contains a large number of oxygen vacancies, absorption and utilization of visible light by the catalyst are greatly improved, and high-conductivity Ni and NiTiO3 are in closer contact, so that photo-induced electrons and holes can be better separated, and the interface charge separation efficiency is remarkably improved. The photocatalyst has high hydrogen peroxide generation efficiency and stability under the irradiation of visible light; the photocatalyst is low in preparation condition requirement and simple to operate, and raw materials are low in price and easy to obtain; the photocatalyst is environment-friendly and high in visible light catalysis efficiency, and has a wide application prospect in the field of photocatalysis.

This invention relates to the application of an indium sulfide-supported bismuth single-atom composite material in hydrogen peroxide production. The indium sulfide-supported bismuth single-atom composite material of this invention comprises indium sulfide and bismuth single atoms supported on the indium sulfide, which are then dried to obtain a composite material (Bi-In₂S₃). The Bi-In₂S₃ composite material obtained by this invention has advantages such as high hydrogen peroxide yield and a simple and controllable preparation process. The Bi-In₂S₃ composite catalyst of this invention exhibits excellent hydrogen peroxide generation rate under actual catalytic reaction conditions; this is because indium sulfide has a narrow band gap and good visible light absorption performance; in addition, the single-atom bismuth adsorbs oxygen molecules in a Pauling-type configuration, avoiding the breaking of oxygen-oxygen bonds, and exhibiting good selectivity for the reduction of oxygen molecules with two electrons, significantly improving the efficiency of oxygen molecule activation into hydrogen peroxide.

This invention discloses a method for the photocatalytic degradation of bisphenol A and the synergistic generation of H2O2 based on O-ZnIn2S4, comprising: adding the O-ZnIn2S4 photocatalytic material to wastewater containing bisphenol A, and performing photocatalytic degradation of bisphenol A and in-situ generation of H2O2 under visible light irradiation. Under light conditions, the O-ZnIn2S4 photocatalytic material of this invention exhibits excellent activity in the organic matter degradation reaction, while its H2O2 generation rate is high. The system of this invention achieves synergistic coupling of organic pollutant removal and in-situ hydrogen peroxide generation, providing a new photocatalytic strategy for green and efficient hydrogen peroxide synthesis and environmental remediation.

The application discloses a carbon-coated cerium oxide material with excellent electrocatalytic oxygen reduction performance, and relates to the technical fields of materials, chemistry and electrocatalysis. The preparation method comprises the following steps: S100, preparation of a cerium oxide precursor; and S200, preparation of the carbon-coated cerium oxide. The amorphous carbon coating technology is used to introduce a carbon layer with high electron density, so that the cerium oxide core is effectively protected from corrosion or decomposition in the reaction process, the stability and service life of the catalyst are significantly improved, the mechanical strength of the catalyst is improved due to the existence of the carbon layer, the particle aggregation and abrasion between particles are reduced, the durable time of the catalyst is further prolonged, the interaction between the amorphous carbon coating and the cerium oxide promotes the generation of more oxygen vacancies and defects, the vacancies and defects serve as active sites, the oxygen reduction reaction is accelerated, and the selectivity to hydrogen peroxide generation is improved.

The invention discloses a photo-induced self-sacrifice stripping photocatalyst and a preparation method and application thereof, and belongs to the technical field of catalysts.The preparation method of the photocatalyst comprises the following steps that 2, 4, 6-trimethylpyridine and alkyl halide are placed in a first solvent for a reaction, and a monomer ETMP-X is obtained; x is any one of Cl, Br and I; and in an inert atmosphere, putting the monomer ETMP-X, TAPB and a base catalyst into a second solvent, and heating to 100-150 DEG C for reaction to obtain the photocatalyst. The prepared photocatalyst is an ionic covalent organic framework material and has high crystallinity and long-range orderliness, the particle size and thickness of the material can be remarkably reduced by conducting photoinduced self-sacrifice stripping on the photocatalyst, and the stripping process of the material is successfully achieved; in addition, the stripped material is applied to the field of photocatalytic hydrogen peroxide production and is coupled with aerobic oxidation of the benzyl alcohol compound, so that ultrahigh hydrogen peroxide generation rate and higher conversion selectivity of the benzyl alcohol compound are realized.

The invention provides a high-curvature nano carbon gas diffusion electrode, a preparation method and a method for electrically driving in-situ generation of calcium peroxide, and belongs to the technical field of electrode materials. According to the method, cotton fabric fibers are subjected to high-temperature rapid pyrolysis carbonization in a Joule heat rapid pyrolysis mode, the high-curvature nano carbon material can be obtained, the high-curvature nano carbon material has extremely high selectivity on 2e-ORR under the alkaline condition, and the hydrogen peroxide generation amount and the Faraday efficiency of the high-curvature nano carbon material are far higher than those of other carbon materials. According to the method, a stable and efficient gas-liquid-solid three-phase reaction interface is constructed, exogenous oxygen and an alkaline electrolyte containing Ca < 2 + > can be electrically driven to produce H2O2 and generate calcium peroxide in situ, a high-curvature nano carbon gas diffusion electrode is used as a cathode, the conversion rate of converting H2O2 on the surface of the electrode into CaO2 can reach 100%, and the purity of the obtained CaO2 is 87.5% and is far higher than that of 70% of a laboratory reagent.

The invention relates to a preparation method and application of a Ni-coated TpTD-COF photocatalytic material. The invention provides a covalent organic framework material (Ni (at) TpTD-COF), and aims to solve the problem of low efficiency of photocatalytic synthesis of hydrogen peroxide by an existing covalent organic framework material. The first method comprises the preparation of TpTD-COF, and the second method comprises the preparation of Ni-coated TpTD-COF. The preparation process is simple and effective, the reagent consumption is low, and the yield is high; the photocatalyst provided by the invention can effectively improve the efficiency of photosynthesis of hydrogen peroxide. Experimental results show that the catalyst has good performance of photocatalytic synthesis of hydrogen peroxide, the hydrogen peroxide generation rate is 6000 [mu] mol.g <-1 >. H <-1 > under the condition that no metal Ni is added, and after the metal Ni is added, the performance is remarkably improved and is 9800 [mu] mol.g <-1 >. H <-1 >.

The invention relates to the technical field of oral irrigators, in particular to an oral irrigator with a function of instantly adjusting hydrogen peroxide concentration and a control method of the oral irrigator with the function of instantly adjusting the hydrogen peroxide concentration, and the oral irrigator with the function of instantly adjusting the hydrogen peroxide concentration comprises a shell. The shell is provided with a water tank assembly, a hydrogen peroxide generation module connected with the water tank assembly, a pump body assembly, a water outlet assembly connected with the hydrogen peroxide generation module and the pump body assembly, and a circuit board assembly electrically connected with the hydrogen peroxide generation module and the pump body assembly. The hydrogen peroxide generation module is used for converting liquid in the water tank assembly into a hydrogen peroxide solution, and the pump body assembly is started to drive the hydrogen peroxide solution to be discharged from the water outlet assembly. The hydrogen peroxide generation module is integrated in the oral irrigator, so that the hydrogen peroxide generation module in the oral irrigator can instantly generate a hydrogen peroxide solution with a proper concentration for irrigating an oral cavity, and the situation that a pre-prepared solution is easily influenced by illumination and temperature and fails is avoided.

The invention belongs to the technical field of electrochemical biosensing, and particularly relates to a membrane-free anti-interference metabolite detection device and a construction method thereof, in particular to a membrane-free anti-interference biosensor based on hydrogen peroxide signal transduction and a construction method thereof. The sensor comprises a working electrode and a reaction layer arranged on the surface of the working electrode, wherein the reaction layer comprises a biological recognition unit for in-situ generation of hydrogen peroxide and a catalysis unit for electrochemical reduction of hydrogen peroxide; the catalytic unit comprises a nitrogen-doped carbon matrix on which at least one of iron (Fe), cobalt (Co) and copper (Cu) in a monatomic form and molybdenum carbide (MoC) nanoparticles are loaded. The sensor disclosed by the invention shows excellent anti-interference capability and detection accuracy in a real human body sample, and can be expanded and applied to various oxidase coupled metabolite detection systems which are generated by depending on hydrogen peroxide, so that a universal sensing platform is provided for non-invasive or minimally invasive metabolite analysis in complex biological fluid.

The present disclosure provides for imaging agents and methods of making and using the same. The imaging agent comprises a luminol component comprising a luminol moiety or functional analogue thereof; a chelator; a linker group bonding or complexing the luminol component to the chelator; and a radiolabel component bound to the chelator. The imaging agent described herein is capable of monitoring, targeting, or imaging oxidative stress, reactive oxygen species (ROS), superoxide generation, or hydrogen peroxide generation, mediating pathophysiology of different disease states.

The application discloses a method for preparing hydrogen peroxide by photocatalysis without a sacrifice agent based on naphthalene imide / perylene imide polymer. The naphthalene imide / perylene imide polymer photocatalyst is synthesized by a hydrothermal method, and the catalyst can catalyze the reaction of oxygen and water to prepare hydrogen peroxide by photocatalysis without adding a sacrifice agent. The naphthalene imide / perylene imide polymer synthesized by the application is a photocatalyst with a donor / acceptor electron transport interface, and the structure greatly improves the electron-hole transport rate, thereby promoting the generation of hydrogen peroxide and inhibiting the decomposition of hydrogen peroxide. The application first applies the naphthalene imide / perylene imide polymer catalyst to the field of photocatalytic preparation of hydrogen peroxide. Compared with the industrial anthraquinone method and the method for preparing hydrogen peroxide by electric and thermal catalysis, the application is safe and environmentally friendly, simple to operate and low in cost.

The invention provides a hydrogen peroxide preparation device and ceiling equipment with the hydrogen peroxide preparation device, the hydrogen peroxide preparation device comprises a hydrogen peroxide preparation assembly, the hydrogen peroxide preparation assembly comprises an electrolysis assembly, the electrolysis assembly comprises an electrolysis anode, an electrolysis cathode and a diaphragm assembly, and the diaphragm assembly is arranged between the electrolysis anode and the electrolysis cathode; the refrigeration assembly is arranged on the side, away from the diaphragm assembly, of the electrolysis anode, and the refrigeration assembly is used for reducing the temperature of the electrolysis anode; wherein the diaphragm assembly has an insulation state before water absorption and a conductive state after water absorption, and when the diaphragm assembly is in the conductive state, the electrolytic anode and the electrolytic cathode are conducted, and the condensed water is electrolyzed to generate hydrogen peroxide. According to the technical scheme, the diaphragm assembly can enter the conductive state only by absorbing a small amount of condensate water, so that a large electrolytic current can be generated only by condensing a small amount of water, the hydrogen peroxide generation efficiency is higher, and the problem of low hydrogen peroxide preparation efficiency in the prior art is solved.

The invention discloses a preparation method and application of a potassium modified graphite phase carbon nitride bifunctional photocatalyst, and belongs to the technical field of photocatalytic materials.According to the method, accurate regulation and control over a g-C3N4 interlayer structure, an electron energy band and surface active sites are achieved by regulating and controlling the KOH loading amount and the impregnation time sequence, on one hand, K < + > is inserted into the g-C3N4 interlayer through a K-N bond, and on the other hand, the KOH loading amount and the impregnation time sequence are adjusted and controlled; the interlayer spacing is enlarged, and photogenerated charge recombination is inhibited; on the other hand, the post-impregnation process can induce partial stripping of the g-C3N4 layered structure, so that the specific surface area is remarkably increased. The prepared catalyst has excellent rhodamine B (RhB) degradation and hydrogen peroxide generation performance under visible light, the degradation efficiency of 80 / KOH-coated C3N4 on RhB reaches 95.46%, the photocatalytic H2O2 generation rate reaches 18.7 mu mol / h, the performance retention rate exceeds 88% after five times of circulation, and the catalyst can be stably applied to the fields of environmental restoration and green chemical synthesis.

This invention belongs to the field of biomedical materials technology, and relates to a piezoelectrically enhanced nanoenzyme composite material, its preparation method, and its antibacterial application. Cobalt-doped molybdenum disulfide is grown in situ on the surface of bismuth titanate nanosheets to obtain a BTO@Co-MoS2 composite material. This composite material exhibits a piezoelectric effect under pressure stimulation. Electrons, under the influence of the built-in electric field at the BTO@Co-MoS2 interface, promote the self-cycling of the molybdenum disulfide redox pair, thereby improving the catalytic activity of halogen-like peroxidases. Simultaneously, the piezoelectric catalysis of hydrogen peroxide generation alleviates the problem of insufficient endogenous hydrogen peroxide. In antibacterial applications, the piezoelectrically enhanced nanoenzyme composite material prepared by this invention achieves bactericidal rates of 98.39% and 99.95% against Staphylococcus aureus and Escherichia coli, respectively.

The application belongs to the field of photoelectrocatalysis, and relates to a non-biased hydrogen peroxide and C3 chemical co-production device based on a Pd-CuO / W-CuBi2O4 photo-cathode and application thereof. The application constructs a heterojunction photo-cathode composed of CuO and tungsten-doped CuBi2O4, and modifies palladium nanoparticles (Pd:CuO / W-CBO) for efficient and stable photoelectrochemical hydrogen peroxide generation. A non-biased photoelectrochemical system is constructed, which uses a Pd:CuO / W-CBO photo-cathode and a Pt / TiO2 anode to realize the synchronization of solar-driven hydrogen peroxide production and electrochemical glycerol oxidation to generate high-value chemicals. The hydrogen peroxide generated at the cathode can realize rapid water disinfection, and the work shows an expandable photoelectrochemical platform capable of stably generating solar-driven hydrogen peroxide and glycerol value-added at the same time, while generating renewable electricity.

A method for directly synthesizing hydrogen peroxide aqueous solution from hydrogen and oxygen, characterized in that a mixed gas of reaction raw material gas and dilution gas is introduced into a liquid phase reaction medium in which a catalyst is dispersed to perform a contact reaction under hydrogen peroxide generation conditions to obtain product hydrogen peroxide; wherein the reaction raw material gas is oxygen and hydrogen, and the dilution gas is carbon dioxide.

Disclosed are a gas-phase hydrogen peroxide generation assembly and a substrate processing apparatus including same. The gas-phase hydrogen peroxide generation assembly may have a vaporization module and a fluid supply module. The vaporization module may be configured to convert liquid hydrogen peroxide into gas-phase hydrogen peroxide. The fluid supply module may include a first line configured to, in a first operation mode, supply the liquid hydrogen peroxide to the vaporization module. The fluid supply module may be configured to, in a second operation mode, discharge a residual of the liquid hydrogen peroxide to a drain using a discharge fluid. The residual may be generated in the first operation mode and remain in the first line.

The application provides a self-breathing anti-fouling cathode, a preparation method thereof, an electrolytic cell and application thereof, and belongs to the technical field of electrochemical electrodes. The preparation method comprises the following steps: mixing a carbon substrate and a catalyst precursor solution, performing first calcination on the mixed solution in a protective atmosphere to obtain an anti-fouling cathode; and performing second calcination on the anti-fouling cathode after spraying a hydrophobic agent on the anti-fouling cathode in an oxygen-containing atmosphere to obtain a self-breathing anti-fouling cathode. The self-breathing anti-fouling cathode can improve the oxygen mass transfer efficiency and inhibit the deposition of Ca 2+ , Mg 2+ and other divalent ions, significantly enhances the hydrogen peroxide generation capacity, and improves the long-term operation stability; on the other hand, the self-breathing anti-fouling cathode has a spatial hydrophobic microenvironment, improves the H2O2 yield without the need of external air ventilation; and the design of the hydrophobic anode reduces the decomposition of H2O2 at the anode, realizes efficient and stable electro-synthesis of H2O2, and is used for pollutant degradation.

The invention provides a preparation method and application of a nitrogen-doped graphite electro-ozonation cathode. The preparation method comprises the following steps: removing grease and dirt on the surface of the graphite felt material through pretreatment; oxidizing the cleaned graphite felt material through an electrochemical oxidation method; ultrasonically soaking the treated graphite oxide felt in a mixed solution of melamine, water and ethanol to obtain a melamine-attached graphite oxide felt, and drying the melamine-attached graphite oxide felt; and placing the melamine-attached graphite oxide felt in a tubular furnace, and carrying out programmed heating pyrolysis in a nitrogen atmosphere to obtain the nitrogen-doped graphite electrode. The preparation method is simple, raw materials are simple and easy to obtain, the price is low, and the method is suitable for large-scale production. The prepared graphite electrode has a rich pore structure, is uniform in nitrogen doping dispersion and relatively stable, and shows enhanced performance of generating hydrogen peroxide through electro-catalytic oxygen reduction, under the same test condition, the nitrogen-doped graphite electrode can degrade 96.1% of acid red B within 10 minutes, and compared with an undoped electrode, the nitrogen-doped graphite electrode has the advantages that the degradation efficiency is improved by 15% or above, and the nitrogen-doped graphite electrode has good application prospects. The method has good application potential in the field of dye wastewater treatment by an electro-ozonation technology.

The utility model discloses an electrically-driven hydrogen peroxide generator which comprises a reaction box and a hydrogen peroxide generating system arranged in the reaction box, the hydrogen peroxide generation system comprises a hydrogenation reaction device, a hydrogenation reaction liquid storage tank, an oxidation reaction device, an oxidation reaction liquid storage tank, an extraction device, an extraction liquid storage tank and a circulating liquid storage tank which are connected through liquid pipelines, and each liquid pipeline is controlled through a liquid conveying unit; the hydrogenation reaction device and the oxidation reaction device are electrolytic reactors, are respectively connected with a gas pipeline and are controlled by a gas conveying unit; the reaction box is provided with a controller, a liquid inlet and outlet and a gas inlet and outlet, the controller is electrically connected with the hydrogenation reaction device, the oxidation reaction device, the liquid conveying unit, the gas conveying unit and the extraction device to implement control and monitoring, the retention time of reaction liquid and reaction gas in the hydrogenation reactor and the oxidation reactor can be controlled, and full reaction is achieved; the device is portable and practical.

The application provides a graphite phase carbon nitride / vanadium disulfide / carbon nanotube ternary heterojunction composite material, and the photocatalyst is a layered nanosheet structure, which takes graphite phase carbon nitride as a skeleton, is doped with vanadium disulfide nanosheets and carbon nanotubes, and the graphite phase carbon nitride, the vanadium disulfide nanosheets and the carbon nanotubes are interwoven to form a heterojunction. The graphite phase carbon nitride, the vanadium disulfide and the carbon nanotube cooperate with each other to construct an efficient photocatalytic system, which can simultaneously drive oxidation (tetracycline hydrochloride degradation) and reduction (hydrogen peroxide generation) processes.

The application belongs to the technical field of electrocatalytic hydrogen peroxide production, and particularly relates to a 3D electrocatalytic in-situ hydrogen peroxide generation system and application thereof. The 3D electrocatalytic in-situ hydrogen peroxide generation system comprises a cathode, an anode, an electrolyte and a Co@TriBpy-COF catalyst. The Co@TriBpy-COF catalyst is prepared by the following steps: firstly, synthesizing TriBpy-COF triazine covalent organic framework by a solvothermal method, and then anchoring metal Co by pyridine N to obtain the triazine covalent organic framework anchoring metal Co, i.e. the Co@TriBpy-COF catalyst. The 3D electrocatalytic in-situ hydrogen peroxide generation system promotes the catalytic cycle of Co 2+ → Co 3+ → Co 2+ , greatly improves the hydrogen peroxide yield, so that the catalyst can be reused and the stability of the system is improved.

This invention discloses a three-dimensional β-ketoenamine covalent organic framework material, its preparation method, and its application in the photocatalytic preparation of hydrogen peroxide, belonging to the technical fields of photocatalytic materials and porous organic framework materials. The material uses tetrakis(4-aminophenyl)methane and 2,4,6-tricarboxymethyl phloroglucinol as monomers, and constructs a three-dimensional interconnected β-ketoenamine structural framework through a solvothermal condensation reaction, forming a three-dimensional COF material TAPM-Tp-COF with open pores and multidirectional electron transport channels. The TAPM-Tp-COF material can efficiently catalyze the two-electron reduction of oxygen to hydrogen peroxide under visible light conditions, with an apparent generation rate of 3672 μmol·h⁻¹. ‑1 ·g ‑1 Furthermore, it exhibits excellent cycle stability and requires no noble metal co-catalyst. This invention significantly improves hydrogen peroxide generation efficiency through three-dimensional structural design, providing an effective pathway for visible light-driven hydrogen peroxide generation.

Copper-boron-ferrite (Cu—B—Fe) composites may be prepared and immobilized on graphite electrodes in a silica-based sol-gel, e.g., from rice husks. Different bimetallic loading ratios can produce fast in-situ electrogeneration of reactive oxygen species, H2O2 and ·OH, e.g., via droplet flow-assisted heterogeneous electro-Fenton reactor system. Loading ratios of, e.g., 10 to 30 wt. % Fe3+ and 5 to 15% wt. Cu2+, can improve the catalytic activities towards pharmaceutical beta blockers (atenolol and propranolol) degradation in water. Degradation efficiencies of at least 99.9% for both propranolol and atenolol in hospital wastewater were demonstrated. Radicals of ·OH in degradation indicate a surface mechanism at inventive cathodes with correlated contributions of iron and copper. Copper and iron can be embedded in porous graphite electrode surface and catalyze the conversion of H2O2 to ·OH to enhance the degradation. Inventive cathodes can be stable catalytically after 20 or more cycles under neutral and acidic conditions.

The present disclosure relates to the technical field of household appliances, and provides a hydrogen peroxide generating device and application thereof. The hydrogen peroxide generating device comprises a shell, a liquid inlet and a liquid outlet arranged on the shell, the liquid inlet is used for being connected with a water supply component, a cathode sheet and an anode sheet for electrolyzing water to generate a hydrogen peroxide solution are arranged in the shell, and the liquid outlet is used for discharging the generated hydrogen peroxide solution. The hydrogen peroxide generating device provided by the present disclosure can electrolyze water entering the shell through the liquid inlet to generate a hydrogen peroxide solution, and the generated hydrogen peroxide solution is discharged through the liquid outlet. The hydrogen peroxide generating device can be applied to household appliances such as laundry washing equipment, laundry treatment equipment, air conditioners, dehumidifiers, refrigerators, dishwashers and the like, and can play a good cleaning, deodorizing, disinfecting, sterilizing and the like role, reduce the use of detergents, and improve the user experience.