7995 results about "Photo catalysis" patented technology

The invention discloses a tetranuclear ladder type organic tin carboxylate complex as well as a preparation method and application thereof, and belongs to the technical field of metal complexes, the tetranuclear ladder type organic tin carboxylate complex is prepared by taking para-position or ortho-position substituted benzoic acid as a ligand and taking organic tin dimethyl tin oxide as a substrate. The preparation method is simple to operate and mild in condition. The tetranuclear ladder type organic tin carboxylate complex can be used as a photocatalyst for photocatalytic production of H2O2, and the photocatalytic H2O2 production rate is as high as 5.12 * 10 < 3 > [mu] mol.g <-1 >. H <-1 > and is higher than the H2O2 production rate of a photocatalyst reported in the existing literature.

A bias-free driven ion-based photoelectrochemical wastewater treatment system and method is disclosed. Through an ion-coupled photogenerated electron-assisted photocatalytic oxidation-reduction pathway, the system achieves efficient treatment of high-salinity wastewater. The system employs electron-ion receptor materials as the counter electrode, providing reaction sites to drive the coupling of photogenerated electrons and cation transfer. Additionally, the voltage generated by the system directly drives hole oxidation to produce strong oxidizing free radicals. Furthermore, this ion-based photoelectrochemical system demonstrates excellent degradation performance in high-concentration chloride media. This indicates that, in addition to cations (such as Na+) helping to accelerate the electron transfer rate, the presence of Cl− further enables efficient and sustainable wastewater treatment. The concept proposed in this invention emphasizes the potential for using abundant sodium chloride in seawater as an inexpensive additive for wastewater treatment.

The invention provides a photocatalysis and biological reaction mixed efficient air purification system, and relates to the technical field of biological air purification, the system comprises a photocatalysis reaction module, a biological reaction module, an intelligent control module, a sensor monitoring module, a data analysis and optimization module, and a modularization and self-maintenance module; the system is combined with a photocatalytic reaction module and a biological reaction module, a multi-stage degradation and efficient decomposition treatment mode is adopted, the photocatalytic reaction module firstly degrades pollutants in air into intermediate products, then the biological reaction module further degrades the intermediate products through microorganisms, and finally thorough purification is achieved. According to the multi-stage synergistic reaction, the air purification efficiency is remarkably improved, thorough removal of pollutants in the treatment process is ensured, the environmental risk is reduced, various indexes in the degradation process are dynamically adjusted through a multi-target optimization algorithm, it is ensured that each stage achieves the optimal effect, and the performance and stability of the whole system are further improved.

The invention discloses an SERS (Surface Enhanced Raman Scattering) sensing chip with stable reusability as well as a preparation method and application of the SERS sensing chip, and belongs to the technical field of photoelectric sensing devices. Comprising a substrate; the semiconductor photocatalyst is positioned on the surface of the substrate; the co-oxidant and the co-reducing agent are positioned on the surface of the semiconductor photocatalyst; the occupying molecule is covalently connected with an exposure site of the auxiliary reducing agent in space; the template molecule is in covalent linkage or coordination linkage with an exposure site of the pro-oxidant in space; wherein the template molecule can be subjected to photocatalytic degradation, so that the pro-oxidant obtains the exposure site again. The template molecules in the sensing chip can be quickly removed through space confinement photocatalytic degradation, and the accuracy of quantitative analysis is improved by using the inorganic imprinted polymer as internal standard molecules.

The invention relates to the technical field of inorganic non-metal coating materials, in particular to high-stain-resistance enamel matte glaze and a preparation method thereof.The high-stain-resistance enamel matte glaze is prepared from selected quartz sand, feldspar and other basic raw materials by adding a composite additive Y and a rare earth activator Z. The preparation method comprises the steps that the basic raw materials are mixed and subjected to ball milling, then the additives are added for continuous ball milling, high-temperature melting, water quenching and secondary ball milling are conducted, and the high-stain-resistance enamel matte glaze is obtained. The granularity is controlled, and the stain resistance is improved. The enamel matte glaze has the advantages of obvious advantages, high stain resistance, difficulty in stain attachment, easiness in cleaning, capability of prolonging the service life of a product and reducing the maintenance cost, photocatalytic self-cleaning and environment-friendly characteristics, good matte effect and capability of improving the competitiveness of the product.

The invention relates to the field of building materials, and discloses a multifunctional foamed ceramic sound insulation and heat preservation material for buildings. Comprising the following raw materials in parts by weight: 42 to 48 parts of pottery clay tailings, 14 to 16 parts of fly ash, 10.5 to 12 parts of crushed stone materials, 2.8 to 3.2 parts of a silicon carbide foaming agent, 0.7 to 0.8 part of a borax fluxing agent, 7 to 8 parts of paraffin / silicon dioxide phase change microcapsules, 0.5 to 1.0 part of graphene, 2.0 to 2.5 parts of nano iron powder, 0.05 to 0.5 part of nano silver, 1.0 to 1.5 parts of photocatalytic titanium dioxide and 0.3 to 0.4 part of a fluorosilane coupling agent. A stable matrix structure is constructed through the argil tailings, the fly ash and the crushed stone materials, the silicon carbide foaming agent and the borax fluxing agent reduce the heat conductivity coefficient, the sound insulation performance is improved, the material is endowed with the antibacterial ability through nano-silver and photocatalytic titanium dioxide, indoor sanitation is guaranteed, and a super-hydrophobic layer is constructed through the fluorosilane coupling agent.

The invention belongs to the field of photocatalytic materials, and particularly relates to a high-entropy sulfide and a preparation method and application thereof. The high-entropy sulfide is granular, the molecular general formula is (MnaFebCocCudZe) xS, x is equal to 1, and the atomic ratio of Mn to Fe to Co to Cu to Zn is a: b: c: d: e of (1-2): (1-2): (1-2): (1-2): (1-2): (1-2): (1-2). The preparation method comprises the following steps: S1, dissolving metal salt in a mixed solvent of isopropanol and glycerol according to the atomic ratio of metal elements, and carrying out solvothermal reaction to obtain a precursor; and S2, dispersing the precursor in ethanol, adding thioacetamide as a sulfur source, and carrying out solvothermal reaction to obtain the high-entropy sulfide. The high-entropy sulfide disclosed by the invention is used as a photocatalytic material and shows excellent photocatalytic performance.

The invention discloses an intelligent continuous pretreatment process for herbicide pesticide wastewater, relates to the technical field of pesticide wastewater pretreatment, and aims to solve the problem of poor removal effect of pesticide residues in wastewater. According to the method, Fenton oxidation, photocatalysis and other processes are accurately selected for different pollutants such as chlorinated organic compounds and triazines, the degradation pertinence is greatly improved, the pollutant removal rate is remarkably increased, all links are seamlessly connected, a pretreatment-deep purification closed loop is formed, the adaptability to complex pesticide wastewater is improved by 40% compared with a single process, and the method is suitable for industrial production. By combining the design of sludge combined treatment, gravity flow sludge discharge and the like, the energy consumption and the operation and maintenance cost are remarkably saved, a multi-stage monitoring and parameter dynamic adjustment mechanism is adopted, the reaction conditions can be timely corrected, the blind feeding of chemicals is reduced, the treatment effect is ensured, the waste of consumables is reduced, and the economic benefit is increased. Compared with the traditional process, the medicament consumption is reduced by more than 30%.

The invention discloses a photocatalytic preparation method of a deuterated acetamide compound, and belongs to the technical field of synthesis of deuterated acetamide compounds. According to the technical scheme, the method is characterized in that a dichloroacetamide compound is used as a raw material, D2O is used as a deuterium source, and the dideuterated acetamide compound is synthesized through reaction under the room-temperature nitrogen illumination condition; according to the method, dichloroacetamide compounds are taken as raw materials, D2O is taken as a deuterium source, deuterated dichloroacetamide compounds are synthesized through room-temperature reaction, and monodeuterated or trideuterated acetamide compounds are respectively obtained through photocatalytic reaction according to different solvents (H2O or D2O) added into a system. The preparation method provided by the invention has the advantages of simple and safe operation, mild reaction conditions, no transition metal participation, cheap and easily available deuterium source, high deuteration rate, controllable number and the like.

The invention discloses a self-cleaning waterproof coating and a preparation method thereof, and relates to the technical field of waterproof coatings. Wherein the waterproof coating is prepared from organic silicon modified acrylic resin emulsion, a photocatalyst nano composite material, hydrophobic modified silicon dioxide aerogel powder, a nanofiber reinforced material, a dispersing agent, a coalescing agent, a thickening agent, a defoaming agent and deionized water; through the compatibility design of the core-shell structure photocatalyst and the super-hydrophobic silicon dioxide aerogel, multiple self-cleaning of adsorption, degradation and scouring is achieved, the durability and reliability of self-cleaning are remarkably improved, surface modified nanofibers are adopted as a reinforcing material, a three-dimensional network structure is formed in a coating film, and the self-cleaning performance is improved. And the flexibility of the organic silicon modified acrylic resin is synergistically complemented, so that the tensile strength and the deformation resistance of the coating are improved, the brittleness problem of rigid particles is avoided, and the durability of the coating is remarkably improved.

The invention relates to preparation of a covalent organic framework material (COF) containing methyl and thiophene and application of the covalent organic framework material in production of hydrogen peroxide. Two thienyl covalent organic framework materials are prepared respectively, and the problem that the yield of hydrogen peroxide produced through photocatalysis of an existing covalent organic framework material is not high is solved. A solvothermal method is adopted for preparation, the preparation process is simple and efficient, the solvent consumption is low, the method is green and environmentally friendly, the yield is high, the problem that the energy utilization efficiency is too low due to mutual compounding of photon-generated carriers and electrons in the photocatalysis process is solved, and the efficiency of photocatalytic production of hydrogen peroxide is effectively improved. The BTTPa-2COF is applied to photocatalytic production of hydrogen peroxide, experimental results show that the BTTPa-2COF has excellent performance of photocatalytic production of hydrogen peroxide, and the performance of hydrogen peroxide production can reach 3680 [mu] molg <-1 > h <-1 > under visible light irradiation.

The invention discloses a synergistic compound light stabilizer for an automobile coating and a preparation method of the synergistic compound light stabilizer, and belongs to the technical field of coating additives. The light stabilizer comprises the following components in percentage by mass: 30-50% of a hindered amine light stabilizer, 20-40% of an ultraviolet light absorber, 5-15% of surface modified nano cerium dioxide, 5-10% of a hyperbranched polyester anti-migration aid and the balance of a solvent, wherein the ultraviolet light absorber is a mixture of benzotriazole and triazine in a mass ratio of (1: 1)-(1: 3); the particle size of the nano cerium dioxide is 10-50nm, and the surface of the nano cerium dioxide is coated with a silane coupling agent; the preparation method comprises the following steps: modifying the surface of nano cerium dioxide, shearing and dispersing multiple components at a high speed, and adjusting and filtering a solvent; the weather resistance of the automobile coating is remarkably improved and the service life of the automobile coating is remarkably prolonged through the synergistic effect of a plurality of light stabilizing components and the combination of the photocatalytic degradation capability of the nano cerium dioxide and the anti-migration characteristic of the hyperbranched polyester.

The invention discloses a biological environment-friendly clothing material with a self-cleaning function and a preparation method of the biological environment-friendly clothing material. According to the invention, the environmental friendliness is obviously improved, and natural components which can be completely biodegraded are adopted and can be quickly decomposed in the natural environment, so that the micro-plastic pollution is reduced; the self-cleaning function is enhanced, and through the synergistic effect of the bionic hydrophobic surface and photocatalytic decomposition, automatic falling and decomposition of stains are achieved; the durability is enhanced, a dynamic self-repairing network can automatically repair daily wear, the service life is prolonged, and the bio-based raw materials are natural, skin-friendly and excellent in air permeability. The supercritical fluid processing and microwave shaping technology replaces a high-energy-consumption process; emission of toxic substances is eliminated, and organic solvents and fluorine-containing compounds are forbidden in the whole process; raw material loss is reduced, and the using amount of functional materials is reduced through an accurate structure regulation and control technology; the maintenance cost is simplified, and the washing frequency and the use of chemical cleaning agents are reduced due to the self-cleaning characteristic; waste is compressed, and resource utilization of by-products is achieved through a closed-loop production system.

The invention discloses a magnetic visible light photocatalyst ZnFe2O4 / MXene as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. According to the specific technical scheme, the preparation method comprises the following steps: fully dissolving a zinc source and an iron source in a solvent under the ultrasonic action, adding a morphology regulator, and preparing magnetic ZnFe2O4 through a hydrothermal method; then a two-dimensional material MXene with high conductivity is introduced to promote separation and migration of ZnFe2O4 photo-induced electrons and holes and inhibit compounding of the ZnFe2O4 photo-induced electrons and holes, so that the photocatalytic efficiency is improved, and the magnetic visible light photocatalyst ZnFe2O4 / MXene is prepared. The prepared photocatalyst is easy to recover, has the advantage of rapidly degrading organic pollutants, and has a good application prospect in the aspect of treatment of organic wastewater such as dyeing wastewater and medical wastewater.

The invention discloses a preparation method of lead-free double perovskite nanofibers capable of efficiently photocatalytic reduction of CO2 at room temperature. The method comprises the following steps: fully dissolving cesium bromide, silver bromide and bismuth bromide in an organic solvent to obtain a precursor solution, adding a ligand and a polymer into the precursor solution, fully magnetically stirring to obtain a spinning solution, and preparing a nanofiber product by utilizing an airflow spinning technology. The airflow spinning technology is creatively adopted to enable the lead-free double perovskite quantum to grow on the nanofiber, a large number of catalytic reaction sites are provided, and the catalytic activity is remarkably improved. According to the method, large-scale preparation of the lead-free double perovskite nanofibers is achieved at the room temperature, controllability and high stability are achieved, operation is easy, the method is suitable for the field of photocatalytic CO2 conversion and the like, and a new thought is provided for sustainable energy development.

The invention discloses a recovery treatment process of heavy metal production wastewater, and relates to the technical field of wastewater treatment. Adjusting the pH value of the wastewater through pretreatment and stirring; 5%-10% of nanometer seed crystals are added in the seed crystal reinforced vulcanization process, a vulcanizing agent is controllably added, and large-particle-size precipitates are generated through pulse stirring; magnetic field separation is performed after magnetic microsphere adsorption; carrying out selective adsorption and acid regeneration on the chitosan-based magnetic resin; micro pollutants are removed through cooperation of the three-dimensional electrode and photocatalysis; concentrating 10-20 times by membrane distillation to enrich heavy metals; metal simple substances with the purity larger than or equal to 99.5% are recycled through pulse electrodeposition; and after deep treatment, the wastewater reaches the standard to be discharged or recycled (the recycling rate is greater than or equal to 70%). The process innovation comprises the steps of enhancing the seed crystal to improve the vulcanization efficiency by 30%, realizing rapid separation by a magnetic material, reducing the energy consumption by 40% by a three-dimensional electrode coupling membrane method, and constructing a vulcanizing agent regeneration (the regeneration rate is greater than or equal to 85%) and heavy metal closed-loop recovery system. Compared with a traditional process, the heavy metal removal rate is larger than or equal to 99.8%, the treatment cost of each ton of water is reduced by 25%-30%, and the method has the advantages of high efficiency, low consumption, environmental protection and recycling and is suitable for multi-metal complex wastewater.

The invention discloses a preparation method of a photocatalytic nanofiltration membrane based on IL-GQDs. The method comprises the following steps: pretreating bagasse, and applying the pretreated bagasse and imidazole ionic liquid (IL) to preparation of ionic liquid functionalized graphene quantum dots (IL-GQDs); the IL-GQDs are uniformly distributed on the surface of the base membrane by utilizing a vacuum-assisted low-temperature interfacial polymerization technology to form an ultrathin photocatalytic active layer; and finally, curing and cleaning to obtain the photocatalytic nanofiltration membrane based on the IL-GQDs. According to the prepared IL-GQDs, the membrane surface is endowed with high specific surface area and excellent photocatalytic activity, and meanwhile, an additional water transmission channel can be established under the condition that the pore diameter of the membrane is not changed, so that the problem of trade-off of a traditional membrane is solved. In addition, through combination of low-temperature and vacuum-assisted interfacial polymerization technologies, the membrane structure is more uniform and compact, defects on the surface of the membrane are reduced, and the stability and the anti-pollution capacity of the membrane are improved. The membrane disclosed by the invention shows relatively high water flux, salt recovery rate and long-term stability in water treatment application.

The invention relates to the field of piggery tail end odor pollution treatment, and discloses a piggery tail end odor purification filter element preparation method and application, the preparation method comprises the following steps: loading a photocatalyst on the surface of a filter element body to obtain a carrier, respectively inoculating 3-5 kinds of antagonism-free deodorization microorganisms into corresponding LB liquid culture mediums for activation and propagation, and carrying out purification on the LB liquid culture mediums to obtain the piggery tail end odor purification filter element. The preparation method comprises the following steps: preparing a bacterial solution, mixing the bacterial solution to obtain a corresponding bacterial solution, compounding all the bacterial solutions in proportion to obtain a compound bacterial solution, infiltrating a carrier in the compound bacterial solution, and carrying out biofilm formation at room temperature to obtain the filter element. After the photocatalyst on the surface is illuminated, some refractory pollutants can be decomposed into smaller intermediate products which are easier to utilize by microorganisms by utilizing light energy, a more suitable substrate is provided for the microorganisms, and the microorganisms can further thoroughly decompose the intermediate products into harmless substances such as carbon dioxide and water, so that the degradation effect is improved. Therefore, the overall degradation efficiency and degree of pollutants are improved.

The invention relates to a recyclable composite water purifying agent and a preparation method thereof, and belongs to the technical field of high polymer materials. The recyclable composite water purifying agent comprises the following components in parts by weight: 12-18 parts of activated carbon, 20-25 parts of diatomite, 15-25 parts of polyaluminum chloride, 6-12 parts of a modified flocculant, 5-10 parts of polyethylene glycol, 1-3 parts of a modified photocatalyst and 250-370 parts of deionized water, the recyclable composite water purifying agent prepared by the invention not only has a good pollutant adsorption effect, but also has an excellent antibacterial effect.

The invention discloses a doped material based on a hexagonal boron nitride / titanium dioxide heterojunction and a preparation method thereof. According to the material, a heterojunction is formed by hexagonal boron nitride and titanium dioxide, and the light absorption performance, the carrier mobility and the photocatalytic efficiency are optimized by doping a nitrogen element, an iron element and a fluorine element; wherein the doped nitrogen element can reduce a band gap by introducing a defect energy level, and broaden a light absorption range to a visible light region and an infrared light region; the doped iron element can promote carrier separation by introducing an intermediate energy level; the doped fluorine element can inhibit carrier recombination by reducing surface defects. The light absorption efficiency of the material in the ultraviolet light range can be improved by constructing the layered # imgabs0 # heterojunction composite material, and the migration rate of electrons and holes can be improved by doping the N element, the Fe element and the F element in the # imgabs1 #, so that the oxidation-reduction reaction is promoted, and reference significance is provided for further improving the application effect of a photocatalyst in sewage treatment.

The invention relates to a conjugated microporous polymer based on a dicarbazole structure and a preparation method and application thereof, the conjugated microporous polymer has a dicarbazole structure unit and a nitrogen-containing aromatic structure unit, the dicarbazole monomer structure is represented by the formula (I): # imgabs0 #, in the structure represented by the formula (I): R = H, R1 = C = H or R1 = H, R = C = H; the structure of the nitrogen-containing aromatic monomer is shown as a formula (II): # imgabs 1 #, wherein the aromatic structure in the structure shown as the formula (II) is any one of benzene, pyridine, pyrimidine, pyrazine and pyridazine. A plurality of conjugated microporous polymers with excellent photocatalytic performance are obtained by changing aromatic monomers with different nitrogen contents, and the conjugated microporous polymers can be applied to high-efficiency production of hydrogen peroxide under photocatalytic conditions.

The invention discloses a novel photocatalyst for producing hydrogen from organic matter wastewater and a preparation method of the novel photocatalyst, and relates to the technical field of photocatalysis. The photocatalyst disclosed by the invention is combined with oxidation-reduction capability, and can effectively degrade and produce hydrogen under the irradiation of sunlight. Through combination of quaternized porous tungsten oxide and vanadate radicals, silver vanadate load growth is promoted, the sunlight utilization rate is increased, and the electron-hole recombination rate is reduced. Reduced graphene oxide is used for pretreatment, active groups are introduced, the reduced graphene oxide is compounded with tungsten oxide / silver vanadate, the binding force is enhanced through heat treatment, photo-induced electron-hole pair compounding is inhibited through the conductivity, and the visible light catalytic performance is improved. The adsorption effect of porous tungsten trioxide and reduced graphene oxide can accelerate the degradation of organic matters. By optimizing the proportion of silver vanadate, tungsten oxide and reduced graphene oxide, the visible light response and charge separation efficiency are enhanced, the degradation and hydrogen production performance is improved, and light corrosion is reduced.

The invention provides a sintered hollow batten for buildings and a preparation method, and belongs to the technical field of novel wall materials, the sintered hollow batten for buildings comprises the following raw materials: high-calcium fly ash, construction waste recycled aggregate, clay, sulphoaluminate cement, a foaming agent, reinforced fibers and an additive; wherein the particle size of the construction waste recycled aggregate is 0.5-5mm, and the construction waste recycled aggregate is subjected to plasma activation treatment; a nano TiO2 photocatalytic coating is loaded on the surface of the construction waste recycled aggregate; the reinforced fibers are composite fibers of basalt fibers and polypropylene fibers, and the mass ratio of the basalt fibers to the polypropylene fibers is (1: 1)-(1: 2). According to the sintered hollow batten for the building, the building waste recycled aggregate subjected to plasma activation treatment is adopted, and the nano titanium dioxide photocatalytic coating is loaded, so that the bonding strength of the aggregate is greatly improved, and the hollow batten is endowed with the function of degrading pollutants such as formaldehyde.

A method for visible light-mediated chemical modification of a polypeptide or protein based on cysteine includes the following steps: allowing a cysteine residue on a cysteine-containing oligopeptide, polypeptide, or protein to undergo a reaction with an activating reagent to generate a free radical precursor in situ; and subjecting the free radical precursor to desulfurization under photocatalytic condition, and allowing the generated free radical intermediate to undergo an addition reaction with an olefin or an alkyne, such that sulfhydryl removal and carbon-carbon bond construction are achieved to produce a chemical modification product of the polypeptide and protein. The method cleverly avoids the influence on the chiral center, and thus the chirality of the amino acid residue can be retained. The method is conducive to well avoiding the occurrence of side reactions, and thus the efficiency of the entire conversion is very high.

The invention relates to the field of forming preparation of plastic state materials, in particular to a bio-based degradable photocatalytic film and a preparation method thereof. The invention provides a ternary composite system taking bacterial cellulose as a framework, chitosan as an interface adhesive and doped titanium dioxide as a photocatalytic active component, and continuous production of the film is realized by adopting an extrusion blow molding process for molding a plastic state material. The degradable photocatalytic film prepared by the method is high in mechanical property, high in photocatalytic capacity and rapid and thorough in degradation under natural conditions.

The invention discloses a self-cleaning photovoltaic super-hydrophobic coating based on a nano-porous structure and a preparation method of the self-cleaning photovoltaic super-hydrophobic coating, and belongs to the technical field of photovoltaic panel coatings. The coating comprises the following components in percentage by mass: 15-25% of nano porous silicon dioxide particles, 5-10% of a low surface energy modifier, 3-8% of photocatalytic nano titanium dioxide, 30-40% of organic silicon resin and the balance of deionized water. The coating has super-hydrophobicity, photocatalytic decomposition of organic matters and wear resistance, can solve the problems of photovoltaic panel dust accumulation, bird droppings, organic matter pollution and the like, and improves the power generation efficiency of a photovoltaic system.

The invention relates to the technical field of industrial wastewater deep purification, and discloses an industrial wastewater deep purification system based on nano catalytic membrane separation, which comprises a pretreatment module, a catalytic degradation module, a membrane separation module, an intelligent control module and a regeneration maintenance module which are sequentially connected according to a treatment flow, the pretreatment module adjusts the water quality of inlet water to a range suitable for subsequent treatment through pH adjustment and suspended matter interception, that is, the pH is 2-11, and the turbidity is less than or equal to 50NTU; the catalytic degradation module is used for decomposing organic pollutants and mineralizing refractory substances under the excitation of ultraviolet / visible light by utilizing the photocatalytic characteristic of a nano catalytic membrane. The TiO2 / WO3 heterojunction nano catalytic membrane is adopted, so that deep oxidation of refractory pollutants such as phenol and sulfonamide antibiotics is realized, finally, the COD removal rate of 98.7% is achieved, and compared with a traditional photocatalytic process, the energy consumption is reduced by 54%.

The invention discloses a process and a device for continuously synthesizing vitamin D3 through photocatalysis, and relates to the technical field of process on-line monitoring and intelligent control. Photochemical reaction requirements under raw materials with different concentrations are matched through multi-band illumination weight dynamic distribution; when the concentration of the 7-dehydrocholesterol fluctuates, the illumination ratio of 290nm to 305nm wavebands is adjusted in real time by a reinforcement learning algorithm, so that the conversion of a pre-vitamin D3 intermediate is more efficient, and the competitive consumption of a by-product path is reduced; the reaction retention time is further optimized through synchronous flow rate adjustment, and local excessive irradiation caused by sudden concentration increase is avoided; the environment temperature and humidity change is incorporated into a state vector, and the control module generates a compensation instruction accordingly; and if the humidity changes suddenly, pulse type flow compensation is triggered to counteract reaction efficiency attenuation. A closed-loop response mechanism reduces the dependence on physical temperature control equipment, and is especially suitable for mobile production scenes.

The invention discloses a preparation method and application of monolithic BiVO4 photocatalytic foamed ceramic. The method comprises the following steps: 1) preparing composite slurry containing BiVO4 powder, an organic additive and a reinforced phase; (2) uniformly attaching the composite slurry to the organic foam skeleton by adopting an impregnation method; 3) performing drying and heat treatment to remove organic components; and 4) performing high-temperature sintering to form the three-dimensional communicated porous structure. Through the structure-function integrated design, the problems that a traditional powder catalyst is difficult to recover, the activity of an immobilized catalyst is low and a supported catalyst is easy to fall off are solved. The obtained product is high in porosity, the compressive strength is larger than or equal to 0.1 MPa, the specific surface area is larger than or equal to 0.1 m < 2 > / g, visible light can be efficiently utilized for degrading emerging organic pollutants in water, and the degradation rate reaches 20-99%. The material has no nano-particle leakage risk, has excellent mechanical strength, chemical stability and engineering applicability, and provides a feasible scheme for large-scale application of a photocatalytic water treatment technology.

The invention discloses a household nano self-cleaning material containing rare earth elements and a preparation method of the household nano self-cleaning material, and aims at solving the problems that a traditional self-cleaning material is narrow in light response range, single in function, poor in durability, non-environment-friendly in preparation process and the like. The material comprises 5-15 parts of rare earth oxide, 50-70 parts of nano titanium dioxide, 10-20 parts of mesoporous silica, 3-8 parts of a fluorinated modifier and 2-5 parts of a bio-based adhesive. Wherein the rare earth elements are doped in titanium dioxide crystal lattices, so that the forbidden band width is reduced, the photocatalytic response range is widened to visible light, and the photocatalytic efficiency is remarkably improved. The preparation method of the material comprises the steps of precursor preparation, hydrothermal reaction, fluorination modification and coating forming, a low-temperature hydrothermal method, supercritical CO2 modification and a photocuring technology are adopted, and the material has the functions of self-cleaning, antibiosis and VOCs degradation, is suitable for various base materials such as household building materials, textiles and electric appliance surfaces, meets the composite requirements of modern home for health and environmental protection, and has wide application prospects. And the preparation process is green and pollution-free, and conforms to the sustainable development concept.