202 results about "Photocatalytic decomposition" patented technology

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 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 a MnWO4 / ZnIn2S4 heterojunction photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. In the experiment process, MnWO4 is dissolved in a precursor solution of ZnIn2S4, the MnWO4 / ZnIn2S4 heterojunction composite materials with different molar ratios are obtained by changing the molar ratio of an Mn source, and the MnWO4 / ZnIn2S4 heterojunction composite materials can be applied to the field of hydrogen evolution through photocatalytic water decomposition. Compared with an existing photocatalyst, the MnWO4 / ZnIn2S4 heterojunction has the advantages that the controllability is good when the MnWO4 / ZnIn2S4 heterojunction serves as a catalyst, the separation efficiency of current carriers can be further improved, and it is obtained through experiments that the composite material has high hydrogen yield and good stability when being used for photocatalytic water splitting. The method is green and environment-friendly, simple, convenient to operate and low in material preparation cost, conforms to the green and environment-friendly concept advocated at present, and has a wide application market prospect.

The invention discloses a preparation method of a bamboo charcoal-based high-dispersion composite photocatalyst for indoor formaldehyde adsorption-photocatalytic decomposition, and belongs to the technical field of indoor air purification materials. The preparation method comprises the following steps: respectively preparing a g-C3N4 or N-TiO2 main component by using an inorganic or organic precursor, loading metal onto the main component, finally adding pretreated bamboo charcoal, mixing, and activating at high temperature to obtain the bamboo charcoal-based composite photocatalyst. According to the invention, high-dispersion metal monatomic or nanocluster components are utilized to accelerate the separation efficiency of photo-induced electrons-holes, and meanwhile, the introduction of bamboo charcoal can effectively adsorb formaldehyde molecules, so that the photocatalytic decomposition reaction of formaldehyde is further accelerated; the material can be repeatedly used and does not need to be regenerated repeatedly, and a green method for efficiently decomposing formaldehyde for a long time is provided.

The invention belongs to the technical field of photocatalytic hydrogen evolution, and particularly relates to application of a g-C3N4 / Al-SrMoO4 heterojunction photocatalyst in hydrogen evolution through photocatalytic decomposition of water. The preparation method comprises the following steps: uniformly dispersing a g-C3N4 / Al-SrMoO4 heterojunction photocatalyst prepared by using a high-temperature molten salt method and a high-temperature calcination method in a mixed solution of simulated seawater, triethanolamine and chloroplatinic acid, continuously introducing argon into a reactor to obtain a relatively vacuum environment, and carrying out photocatalytic decomposition of water to produce hydrogen under the irradiation of simulated sunlight. The g-C3N4 / Al-SrMoO4 heterojunction photocatalyst disclosed by the invention has better stability and light absorption characteristic, can effectively reduce the recombination of photo-induced electrons and holes and improve the photocatalytic activity, is low in raw material cost, mild in reaction condition and environment-friendly and pollution-free, and conforms to the currently advocated green and environment-friendly concept.

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 invention provides a composite polymer coconut shell charcoal tufted carpet as well as a preparation method and application thereof, and belongs to the field of polymer composite carpets. The adsorption layer is compounded on the back surface of the bonding layer, so that organic matters and toxic and harmful substances in the carpet are efficiently removed. The coconut shell charcoal in the adsorption layer is acidified by nitric acid, then an active functional group is introduced, the coconut shell charcoal and a titanium source are subjected to a hydrothermal reaction, then calcination is performed to improve the crystallinity and the interface bonding force, and the adsorption-photocatalytic decomposition dynamic cycle of volatile organic compounds is achieved. And meanwhile, interlayer adhesion is enhanced by combining a needling process, and high mechanical strength and environmental protection performance are synchronously realized. Through multi-component cooperation and process optimization, a carpet solution with functionality and durability is provided for the fields of automotive interiors and the like.

The invention discloses a preparation method and application of a pyrenyl metal organic framework two-dimensional ultrathin nanosheet, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: respectively dispersing a 1, 3, 6, 8-tetra (4-carboxybenzene) pyrene ligand and a metal salt in an organic solvent or a mixed solution of the organic solvent and deionized water, uniformly stirring, dropwise adding the obtained ligand solution into a metal salt solution in a stirring state, uniformly stirring, washing, and drying to obtain the 1, 3, 6, 8-tetra (4-carboxybenzene) pyrene complex. And filling the obtained mixed solution into a stainless steel reaction kettle containing a polytetrafluoroethylene lining, carrying out solvent heat treatment, cooling, centrifuging, washing, and freeze-drying to obtain a series of pyrenyl MOF two-dimensional ultrathin nanosheets. The method does not need a regulator, the preparation process is mild and simple, and the method has high repeatability and universality. The thickness of the prepared ultrathin two-dimensional MOF nanosheet is less than 3nm, and the ultrathin two-dimensional MOF nanosheet has the characteristics of micron size and large specific surface area, and can be used as an excellent candidate of a photocatalyst for producing hydrogen by photocatalytic decomposition of water.

The utility model discloses VOCs (Volatile Organic Chemicals) organic waste gas purification equipment, which relates to the technical field of waste gas purification, is suitable for purifying VOCs organic waste gas and comprises a waste gas cooling box, the adsorption unit is arranged on one side of the waste gas cooling box and is used for adsorption; the photolysis assembly is arranged at one end of the adsorption unit and is used for photolysis; the adsorption unit is arranged at the other end of the photolysis assembly and used for adsorption, and the adsorption unit comprises a liquid extraction assembly and an atomization assembly arranged in the liquid extraction assembly. According to the waste gas treatment device, the waste gas cooling box, the tank body, the liquid storage box, the infusion pump, the gas outlet pipe, the connecting pipe I, the mounting ring and the atomizing spray pipe are matched with one another, so that harmful substances in waste gas can be conveniently absorbed; through mutual cooperation of the supporting frame, the adsorption box, a second connecting pipe, an activated carbon plate, a mounting base, a heating pipe, a catalyst pipe, an exhaust pipe and a catalysis box, VOCs in waste gas can be conveniently absorbed and subjected to a catalytic reaction, and therefore waste gas purification is more sufficient.

The present invention discloses a method for preparing a preservative material modified with biomass carbon quantum dots, comprising the following steps: (1) preparing a biomass carbon quantum dot solution; (2) preparing titanium dioxide nanosheets; (3) ultrasonically dispersing the titanium dioxide nanosheets in deionized water and then ultrasonicating, then mixing the titanium dioxide nanosheets with the biomass carbon quantum dot solution and then ultrasonicating, and then performing a high-temperature treatment. The obtained product is subsequently treated to obtain carbon quantum dot-modified titanium dioxide nanosheets with antibacterial and ethylene decomposition functions, i.e., a preservative material modified with biomass carbon quantum dots. The present invention also discloses a preservative material modified with biomass carbon quantum dots prepared by the above method, and the use of the preservative material modified with biomass carbon quantum dots in the preparation of products with antibacterial and photocatalytic ethylene decomposition functions, as well as the use of the preservative material in the preservation of fruits and vegetables.

The invention relates to the technical field of photocatalytic materials, in particular to doped modified polyheptazinyl imide as well as a preparation method and application thereof. The preparation method of the doped modified polyheptazinyl imide comprises the following steps: carrying out thermal polymerization reaction on a carbon nitride precursor to obtain polymer carbon nitride; and carrying out thermal polymerization reaction on the polymer carbon nitride in the presence of a dopant in the presence of a chloride fused salt as an eutectic salt template to obtain the doped modified polyheptazinamide. The doped modified polyheptazinyl imide prepared by the preparation method has a wide spectral response range, the light absorption range of a photocatalytic material is greatly widened, and sunlight is expected to be utilized to the maximum extent, so that high activity of photocatalytic decomposition of water to produce hydrogen is obtained.

The invention relates to the field of titanium dioxide photocatalytic water decomposition, in particular to a preparation method of doped rutile titanium dioxide with selective exposure of {101} and {110} crystal faces and low defect concentration. The preparation method comprises the following steps: by taking a titanium elementary substance or a titanium-containing compound as a precursor, adding a heterogeneous metal element compound of which the valence state is lower than positive tetravalence as a morphology control agent and a defect inhibitor, fully mixing with an ionic compound serving as a molten salt medium, carrying out one-step high-temperature heat treatment in an oxidizing or reducing atmosphere, cooling, and washing off the molten salt medium, thereby obtaining the titanium-containing composite material. The rutile-doped titanium dioxide nano or micron particles with specific crystal face selective exposure and low defect concentration are obtained. According to the invention, a specific heterogeneously doped metal element compound is used as a morphology regulating agent and a defect inhibitor, so that the synergistic regulation and control of the microstructure and surface and bulk phase defects of rutile titanium dioxide are realized. Therefore, the separation efficiency of rutile titanium dioxide bulk phase photo-generated charges and the activity of photocatalytic decomposition of water to produce hydrogen are greatly improved.

The invention discloses an anti-fouling easy-to-clean coating and a preparation method thereof, and relates to the technical field of coatings. The invention discloses an anti-fouling easy-to-clean coating. The coating comprises the following raw materials in parts by weight: 30-50 parts of polymethyl methacrylate, 10-15 parts of modified nano titanium dioxide, 20-30 parts of a fluorocarbon polymer, 3-8 parts of a silane coupling agent, 8-12 parts of nano zinc oxide, 5-10 parts of a plasticizer, 2-6 parts of a dispersant, 1-3 parts of a leveling agent, 4-8 parts of a cross-linking agent, 1-3 parts of an antioxidant, 3-7 parts of a modified cellulose derivative and 2-5 parts of an antibacterial agent. And 5-10 parts of a modified shape memory polymer microcapsule. The anti-fouling and easy-to-clean coating disclosed by the invention is high in anti-fouling property, and the fluorocarbon polymer and the modified nano titanium dioxide are cooperated, so that stains are difficult to attach and can be decomposed by photocatalysis; cleaning is easy, and stains can be easily removed due to the low surface; the water seepage resistance is good, and the special modified cellulose derivative effectively blocks moisture; the antibacterial effect is good, and various microorganisms can be inhibited; and the self-repairing capability is also achieved, recovery can be achieved after damage, the service life is greatly prolonged, and the material protection requirement is comprehensively met.

The invention discloses a preparation method and application of a CuCo2S4 nanotube cluster / Zn3In2S6 nanosheet composite photocatalyst in the field of photocatalytic materials, the catalyst takes a cobalt sulfide copper nanotube cluster as a substrate, an indium zinc sulfide nanosheet layer is loaded on the surface, and a unique composite structure is formed. The preparation method comprises the following steps: preparing a CuCo nanotube cluster precursor through a hydrothermal method, and further preparing the CuCo2S4 nanotube cluster / Zn3In2S6 nanosheet composite photocatalyst through vulcanization and an oil bath method. The preparation method is simple, raw materials are easy to obtain, conditions are mild, control is easy, and the method is suitable for large-scale production. The prepared catalyst has high specific surface area and good dispersibility, also shows high carrier separation efficiency and strong light absorption performance, and can significantly improve the efficiency of photocatalytic decomposition of water to produce hydrogen and the efficiency of heavy metal removal under visible light.

The invention belongs to the technical field of air purification devices, and particularly relates to a photocatalyst nanometer decomposition deodorization device which comprises a shell. The dustproof plate is fixedly connected to the inner wall of the bottom of the shell; the silica gel filter plate is arranged above the dustproof plate and is fixedly connected to the inner wall of the bottom end of the shell; large-particle impurities in the waste gas can be filtered through the dustproof plate; moisture in the waste gas can be filtered through the silica gel filter plate; the temperature of waste gas can be adjusted through the heating plate; waste gas passes through a photocatalytic filter plate, a second motor is started, the second motor drives a transmission shaft to rotate through an output shaft, and a partition plate, a rotary drum and the photocatalytic filter plate are driven to rotate through the transmission shaft, so that the contact area of the waste gas and a photocatalyst coating is increased, an ultraviolet lamp is started at the same time, and the photocatalyst coating generates active oxygen under the action of the ultraviolet lamp; harmful gas in the air is oxidized and decomposed into carbon dioxide and water, so that the waste gas is fully catalyzed, the function that the waste gas is fully subjected to photocatalytic decomposition and then discharged is achieved, and the deodorization purpose is achieved.

The application discloses oligomerization degree carbon nitride nanosheet containing partial supramolecular chains and a preparation method and application of photocatalytic decomposition of water to simultaneously produce hydrogen and oxygen, and the preparation method comprises the following steps: adding melamine and cyanuric acid into a solvent, stirring after ultrasonic treatment, and drying to obtain supramolecular precursor powder; and calcining the supramolecular precursor powder to obtain oligomerization degree carbon nitride containing partial supramolecular chains. The application retains partial supramolecular oxygen-containing structures to optimize adsorption and dissociation of oligomerization degree carbon nitride nanosheet and water molecules at a reaction liquid interface, realizes high H and OH enrichment of a local environment, and promotes performance improvement of photocatalytic complete decomposition of water.

The invention relates to the technical field of demulsifiers, in particular to a crude oil demulsifier as well as a preparation method and application thereof. The crude oil demulsifier contains polyether modified organic silicon, amine-terminated polyether, a nano titanium dioxide-graphene compound, polyoxyethylene fatty acid, ammonium persulfate and a novel sulfobetaine derivative; the components are mixed according to a specific proportion; the nano titanium dioxide-graphene compound is prepared through a unique reaction, and the derivative also has an exclusive synthesis path; the demulsifier can reduce interfacial tension, decompose impurities through photocatalysis, adapt to complex crude oil and improve the demulsification effect. The demulsification efficiency is high, the dehydration rate exceeds 90%, and the desalination rate exceeds 80%; the adaptability to high-salt and high-acid-value crude oil is high, organic impurities can be photolyzed, and the quality of the crude oil is improved; and the environment-friendly property is good, and efficient and green development of crude oil extraction and processing is promoted.

The present invention discloses a covalently bonded tin sulfide / zinc indium sulfide composite material, which consists of two-dimensional zinc indium sulfide nanosheets supported on one-dimensional tin sulfide nanoribbons. The tin atoms in the tin sulfide nanoribbons are covalently bonded to the sulfur atoms in the zinc indium sulfide nanosheets. This composite material can be used as a photocatalyst in photocatalytic water splitting for hydrogen production. The preparation method disclosed in the present invention includes using water-soluble tin source and sulfur source as raw materials, performing hydrothermal reaction in an alkaline aqueous solution to obtain one-dimensional tin sulfide nanoribbons, adding them to the precursor solution of zinc indium sulfide, and heating and stirring to react to obtain the covalently bonded tin sulfide / zinc indium sulfide composite material. The present invention has excellent visible light response ability, promotes the rapid separation and transfer of photo-generated charges, and significantly improves the photocatalytic water splitting performance for hydrogen production. The preparation method of the present invention has a simple process, easily available raw materials, and is suitable for large-scale application.

This utility model discloses a photocatalytic formaldehyde removal device, relating to the field of air purification equipment technology. It includes an outer casing, inside which is a photocatalytic formaldehyde removal system and a main controller. The front has a circular air outlet, and the back has a square air inlet. Below the air outlet is a touch panel. Outside the air outlet is a guide mechanism consisting of a guide rod and a collection box. Inside the outer casing is a slidably connected compartment. The guide rod is an inverted L-shaped plastic rod with an arc-shaped guide groove. The bottom of the collection box has a long-diameter square tube. The compartment has a ring handle and a sliding buckle. This formaldehyde removal device can efficiently collect water vapor and dirt generated by photocatalytic decomposition, facilitating cleaning, improving air intake and formaldehyde removal efficiency, and has a stable and reliable structure.

This invention provides a three-dimensional carbon nitride photocatalyst with an advanced structure, its preparation method, and its application, relating to the field of photocatalyst technology. The preparation method includes: obtaining graphitic carbon nitride through thermal condensation and nitrogen-rich precursor polymerization; mixing the graphitic carbon nitride in a polyphenol solution, then adding Tris-HCl solution dropwise and stirring to react, causing the polyphenols to polymerize in situ on the surface of the graphitic carbon nitride to form a polyphenol coating; separating and drying the coating to obtain a composite intermediate; mixing and grinding the composite intermediate with molten salt, then calcining it under a protective atmosphere at 400-650℃ to obtain the three-dimensional carbon nitride photocatalyst with an advanced structure. The preparation method provided by this invention is green and environmentally friendly, using readily available and inexpensive raw materials. Simultaneously, the reaction conditions are mild, requiring no template agent. The resulting catalyst has an advanced structure and exhibits extremely high photocatalytic activity for water splitting to produce hydrogen and excellent stability at room temperature and pressure, showing promising application prospects and economic benefits.

The invention discloses an anti-pollution CO2 separation membrane module and a preparation method thereof. The anti-pollution CO2 separation membrane module effectively deals with a complex industrial flue gas environment through multi-layer collaborative design. The matrix supporting layer adopts a fluorinated cross-linked network, so that the permeation of acidic components is blocked, and sulfonation corrosion is avoided; the anti-pollution surface layer is combined with electrostatic repulsion and photocatalytic decomposition mechanisms of the zwitterionic polymer, and pollutants are dynamically removed. The device can continuously work in sulfur-containing and high-humidity flue gas, and then the comprehensive energy consumption is reduced through material optimization and structure simplification. The high-selectivity adsorption of the amino-functionalized porous material reduces the pressure difference required by gas separation, and the flow guide design of the membrane shell optimizes the airflow distribution so as to reduce the power consumption. And meanwhile, the modular interface design of the membrane shell adapts to carbon capture requirements of different scales, and flexible deployment can be realized from small and medium-sized pilot points to industrial devices. According to the regeneration method, through mild chemical cleaning and physical back flushing strategies, membrane performance recovery is achieved through a low-grade heat source, and the operation and maintenance cost is further reduced.

The invention belongs to the technical field of photocatalytic materials, and discloses a triazine-hydrazine bond-based efficient water photolysis COF material as well as a preparation method and application thereof. The material is prepared by carrying out condensation polymerization reaction on benzo [1, 2-b: 3, 4-b ': 5, 6-b'] trithiophene-2, 5, 8-tricarboxaldehyde, 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) tribenzaldehyde and hydrazine hydrate. An intramolecular donor-acceptor (D-A) electronic structure is constructed by introducing an electron-rich benzotrithiophene unit and an electron-deficient triazine unit, and the electron-deficient triazine unit and the electron-deficient triazine unit are connected through a full-conjugated azine bond, so that separation and transmission of photo-generated charges are effectively promoted. The preparation method adopts a solvothermal method, and a high-crystallinity product is obtained through acid catalysis and degassing crystallization. The material has high specific surface area and excellent chemical stability, and shows high-efficiency photocatalytic water splitting hydrogen production activity and good cycle stability under the driving of visible light.

The invention discloses a near-infrared absorption zwitter-ion ethylene-linked covalent organic framework photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out hydrothermal reaction on a mixture of an N-(3-sulfopropyl)-2, 4, 6-(trimethyl) pyridine monomer, an aldehyde monomer containing a thiophene unit, organic alkali and water to obtain the near-infrared absorption zwitter-ion ethylene-linked covalent organic framework photocatalyst. The zwitterionic ethylene-linked covalent organic framework photocatalyst ZVCOFs with near-infrared absorption is obtained. According to the method, a one-step green hydrothermal method is adopted, water is used as a solvent, pollution to the environment is reduced, traditional tedious freezing-pumping-unfreezing operation is omitted, high-yield COFs are obtained, and the method has the potential of industrial amplification. The ZVCOFs show excellent hydrophilicity due to rich zwitterionic groups and thiophene units, the light absorption range can be expanded to a near-infrared light region, the light absorption band edge reaches up to 852-1230 nm, and the ZVCOFs have excellent hydrogen evolution performance of photocatalytic water decomposition.

The application belongs to the field of photocatalytic water decomposition, and relates to a hollow indium zinc sulfide composite catalyst material loaded with double cocatalysts and a preparation method and application thereof. The material is a composite material of double metal chalcogenide indium zinc sulfide and MnO2 and Ti3C2, the MnO2 has a hollow spherical structure, the indium zinc sulfide has a two-dimensional sheet structure, the indium zinc sulfide is coated on the outer surface of the MnO2 to form a composite spherical structure, and the Ti3C2 is attached to the surface of the composite spherical structure. The catalyst material not only has a higher specific surface area to provide more surface active sites, but also can enhance the refraction and reflection of light, thereby improving the utilization efficiency of light. The MnO2 and the Ti3C2 can be used as hole-type and electron-type cocatalysts respectively, and the unique carrier transport path thereof promotes the separation and transfer of photo-generated carriers, thereby enhancing the photocatalytic hydrogen production and benzyl alcohol oxidation performance of the material.

The invention discloses a triptycene modified beta-ketoenamine covalent organic framework as well as a preparation method and application thereof, and the triptycene modified beta-ketoenamine covalent organic framework is prepared by polycondensation of a polyamino triptycene monomer, a 1, 3, 5-trialdehyde phloroglucinol monomer and an enamine monomer. The triptycene modified beta-ketoenamine covalent organic framework disclosed by the invention has excellent performance of photocatalytic decomposition of water to produce hydrogen, and can be repeatedly used. The preparation method provided by the invention is simple in process, mild in condition, short in time consumption, environment-friendly and easy for industrial production.

This invention relates to the field of photocatalysis technology, and more particularly to a photocatalyst, its preparation method, and its application. The invention provides a photocatalyst comprising CdSO4, h-CdS, and c-CdS in sequence; a heterojunction is formed between h-CdS and c-CdS, and a heterojunction is formed between CdSO4 and h-CdS. The photocatalyst effectively promotes photogenerated charge separation, suppresses electron-hole recombination, and significantly improves photocatalytic performance. Example results show that the photocatalyst provided by this invention achieves a water splitting rate of 12.4 mmol / h / g, which is 2.9 times higher than that of c-CdS.

The invention discloses a preparation method and application of a sulfonyl-containing defect ternary donor-acceptor organic polymeric material. The material has excellent performance in the aspect of hydrogen production by photocatalytic decomposition of water. According to the present invention, 1, 3, 6, 8-tetra (4-formaldehyde phenyl) pyrene, 3, 7-diaminodibenzo [B, D] thiophene-5, 5-dioxide and trialdehyde phloroglucinol are adopted as synthesis precursors, and a Schiff base reaction is performed to obtain the sulfonyl-containing defect ternary donor-acceptor organic polymerization material; according to the ternary donor-acceptor structure and the double channels located at the defect, a channel for directionally and rapidly transferring current carriers is constructed, separation of electron hole pairs is accelerated, the migration rate of electrons is increased, the energy barrier of hydrogen production reaction is reduced, and meanwhile the hydrophilicity of the material is improved through sulfuryl. The material is stable in property, does not cause secondary pollution, can be recycled, and shows excellent performance of photocatalytic decomposition of water to produce hydrogen.

A ZIF-derived zinc-cadmium sulfide photocatalyst, its preparation method, and its application are disclosed. The catalyst, by molar fraction, comprises: 35-50% 2-methylimidazole; 0-7.7% divalent cadmium ion compound; 0-7.7% divalent zinc ion compound; 7-10% thioacetamide; and 35-50% amines. The preparation method involves: preparing a 2-methylimidazole solution and a cadmium-zinc mixed solution separately; then preparing a ZIF precursor solution with cadmium and zinc as the central metals; adding thioacetamide to the precursor solution; transferring the solution to a polytetrafluoroethylene liner and hydrothermally treating it; finally collecting the hydrothermally treated solution, centrifuging, washing, drying, and grinding to obtain the ZIF-derived zinc-cadmium sulfide photocatalyst. The catalyst prepared by this invention has a large specific surface area and exhibits significant catalytic effects in photocatalytic water splitting for hydrogen production. Furthermore, the catalyst has a stable structure and can be recycled for a long period without a significant decrease in the hydrogen production rate.

The present disclosure belongs to the technical field of material synthesis and utilization of renewable clean energy, and provides a red titanium dioxide heterojunction, and a preparation method therefor and the use thereof. The preparation method for a red titanium dioxide heterojunction comprises: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a second precursor of a B-doped titanium dioxide heterojunction; and mixing any one of (NH4)2TiF6, NH4TiOF3 and (NH4)2TiOF4 with the second precursor, followed by a nitridation treatment in an ammonia gas flow to obtain a red titanium dioxide heterojunction uniformly doped with a rutile phase and an anatase phase. In the present disclosure, titanium dioxide in a rutile phase can be nitrided by means of an ammonium fluotitanate treatment, such that a red titanium dioxide heterojunction uniformly doped with both a rutile phase and an anatase phase is formed, which heterojunction exhibits relatively high water oxidation activity in a photocatalytic water decomposition reaction.

The invention relates to the technical field of renewable energy source large-scale preparation, in particular to a stepped sample introduction photocatalytic water splitting hydrogen production sample introduction device which comprises a photocatalytic sample introduction device, a sample introduction device hollow interlayer, a port catalyst magnetic suction vessel and an inner cavity. The photocatalyst sample injector is wrapped with a sample injector outer-layer condensation sleeve, a sample injector hollow interlayer is arranged in the photocatalyst sample injector, tempered glass is arranged between the hollow interlayer and an inner cavity, the stepped double-track is a double-track with the side wall transversely opened, and a pressure buffering port is formed in the stepped double-track. According to the photocatalytic hydrogen production sampling system disclosed by the invention, the stepped double tracks are arranged in the photocatalyst sampler, so that the rate of a photocatalyst entering a reactor through the sampler is increased, the loss of the catalyst is reduced, the pressure difference between the inner cavity of the sampler and the catalyst magnetic suction vessel is promoted, and the photocatalyst is uniformly dispersed in the sampling stage; the utilization efficiency of the photocatalyst is improved, the operation cost is saved and the loss of a sample injector is reduced.