326 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.

There is disclosed photoactive, one-dimensional zinc and cobalt-based bimetallic oxide and sulfide nanorods (ZnCo2O4 NRs, ZnCo2S4 NRs) and their heterojunction composites (1D / 1D ZnCo2O4 / ZnCo2S4) to be used as photocatalysts for hydrogen production and carbon dioxide reduction using solar energy. Also disclosed herein, is a method of synthesizing these compounds via hydrothermal processes and a self-assembly approach. 1D / 1D heterojunctions of ZnCo2O4 / ZnCo2S4 composites exhibit favourable interface interactions. The photocatalytic performance of both pure and composite materials is evaluated through water splitting to produce hydrogen and CO2 reduction to yield CO and CH4 using slurry phase and fixed bed photoreactor systems. ZnCo2S4 NRs demonstrate superior hydrogen production whereas CO2 reduction is more pronounced with ZnCo2O4. The highest photocatalytic efficiency is achieved using the heterojunction composites attributed to efficient charge carrier separation facilitated by a suitable band structure. The invention underscores the successful synthesis of highly efficient 1D structured materials for photocatalytic applications.

The invention provides a red titanium dioxide out-phase junction as well as a preparation method and application thereof, and belongs to the technical field of material synthesis and renewable clean energy utilization. The preparation method of the red titanium dioxide out-phase junction comprises the following steps: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a B-doped titanium dioxide out-phase junction second precursor; and mixing any one of (NH4) 2TiF6, NH4TiOF3 and (NH4) 2TiOF4 with the second precursor, and carrying out nitrogen treatment in an ammonia gas flow to obtain the rutile phase and anatase phase uniformly doped red titanium dioxide out-phase junction. According to the invention, titanium dioxide in a rutile phase can be nitrided through ammonium fluotitanate treatment, so that a red titanium dioxide out-phase junction uniformly doped with two phases of rutile and anatase is formed, and the red titanium dioxide out-phase junction shows relatively high water oxidation activity in a photocatalytic water decomposition reaction.

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 discloses a nitride Ta3N5 and a preparation method and application thereof.The specific method comprises the steps that a precursor I is subjected to pyrohydrolysis, TaOx with the small size is prepared, the nitride Ta3N5 can be prepared after short-time nitridation by means of the characteristics that TaOx is amorphous and small in particle radius, generation of low-valence metal defects is effectively reduced, the charge separation efficiency is improved, and the method is suitable for industrial production. The Ta3N5 shows water decomposition activity in a photocatalytic water decomposition reaction, and the activity of the Ta3N5 is obviously improved compared with that of Ta3N5 prepared by a conventional method.

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 provides a three-dimensional carbon nitride photocatalyst with a tip structure as well as a preparation method and application of the three-dimensional carbon nitride photocatalyst, and relates to the technical field of photocatalysts. The preparation method provided by the invention comprises the following steps: performing thermal condensation polymerization on a nitrogen-rich precursor to obtain graphite-phase carbon nitride; the preparation method comprises the following steps: mixing graphite phase carbon nitride in a polyphenol solution, dropwise adding a Tris-HCl solution, carrying out stirring reaction, carrying out in-situ polymerization on polyphenol on the surface of the graphite phase carbon nitride to form a polypolyphenol coating, and carrying out separation and drying to obtain a composite intermediate; and mixing and grinding the composite intermediate and fused salt, and calcining in a protective atmosphere of 400-650 DEG C to obtain the three-dimensional carbon nitride photocatalyst with a tip structure. The preparation method provided by the invention is green and environment-friendly, the raw materials are simple, convenient, easy to obtain and low in price, meanwhile, the reaction conditions are mild, a template agent does not need to be used, and the prepared catalyst has a tip structure, has extremely high activity of photocatalytic decomposition of water to produce hydrogen and excellent stability at normal temperature and normal pressure, and has good application prospects and economic benefits.

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 discloses a carbon nano tube / layered double hydroxide / cadmium sulfide composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of hydrogen desorption by photocatalysis of water. The mass fraction of the carbon nano tube in the composite photocatalyst is 0.02%-0.04%, the mass fraction of the layered double metal hydroxide in the composite photocatalyst is 46.96%-51.98%, and the mass fraction of the cadmium sulfide in the composite photocatalyst is 48%-53%. According to the invention, Co-ZIF is anchored on a carbon nanotube by using carboxyl groups on the surface of an acid functionalized carbon nanotube; in the etching process, the surface of the CNT / Co-ZIF is roughened and a layered structure is generated by utilizing ion exchange and hydration reaction, so that the Co-ZIF is converted into CoMo-LDH; after the cocatalyst CNT / CoMo-LDH is compounded with CdS, the cocatalyst CNT / CoMo-LDH not only has good morphology and dispersity, but also accelerates electron transfer and improves the separation and migration efficiency of photo-induced electrons-holes by virtue of the serially connected carbon nanotubes, so that the photocatalytic water decomposition and hydrogen evolution performance of the nano semiconductor CdS is improved.

The utility model discloses a sewage pool deodorization device, which belongs to the technical field of deodorization and comprises a deodorization box body, an air inlet is fixedly arranged at the top of the deodorization box body, an air outlet is fixedly arranged on the outer surface of the deodorization box body, an air suction pump is fixedly arranged on the outer surface of the deodorization box body, and the air suction pump is fixedly connected with the air outlet. The deodorization box body is internally provided with a movable spraying assembly for circularly treating odor, the interior of the deodorization box body is fixedly connected with a filter screen, and the outer surface of the deodorization box body is provided with a mounting assembly for conveniently replacing the filter screen; by means of the technical scheme, a deodorant can be evenly sprayed into the whole deodorization box body, circular treatment of odor is achieved, the deodorization efficiency is improved, three deodorization technologies of physical adsorption (activated carbon), chemical spraying (deodorant) and photocatalytic decomposition (photocatalyst) are combined, odor in a sewage pool is more comprehensively and efficiently removed, cleanliness of exhausted gas is guaranteed, and the environment is protected. And the cleanness of discharged gas is ensured.

The invention discloses a triphenylamine-based conjugated microporous polymer as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic semiconductor materials. The triphenylamine-based conjugated microporous polymer is prepared by taking triphenylamine biphenyl as a skeleton and an acetylenic bond as a connecting unit, respectively introducing pyrene, naphthalene, biphenyl or benzene, and synthesizing through a Sonogashira coupling reaction. Test results of the applicant show that the triphenylamine-based conjugated microporous polymer has high hydrogen evolution rate and good chemical stability and thermal stability during hydrogen production by photocatalytic decomposition of water.

The invention provides a novel reservoir water body ecological restoration and purification device, and belongs to the technical field of water environment treatment devices. Physical filtration of a water body can be formed through the outer cylinder component, the floating bag component, the water absorption component, the water absorption filtering component, the secondary filtering component and the hydraulic driving component, and organic pollutants in the water body can be degraded through the photocatalytic decomposition component; after the self-priming pump is started, on one hand, suction force to a water body can be directly generated, the water body in a reservoir can enter the water suction barrel, and physical interception and filtration of the water body are achieved through lateral filter holes formed in the water suction barrel and secondary filter holes formed in a secondary filter plate; and the hydraulic impeller drives the water suction cylinder to rotate through the transmission mechanism, so that the uniformly distributed drainage blades can generate vortex force, and the purification, filtration and circulation speed of the water body is accelerated.

The invention belongs to the field of photocatalytic materials, and particularly relates to red crystalline carbon nitride as well as a preparation method and application thereof. A bottom-to-top strategy is adopted, a molten salt auxiliary calcination method is utilized, a nitrogen-rich precursor melamine and molten salt potassium thiocyanate and ammonium chloride are uniformly mixed and then subjected to a thermal polycondensation reaction, and then the red crystalline carbon nitride is obtained through cleaning and drying treatment. According to the invention, the defects of low visible light utilization rate and poor crystallinity of carbon nitride are overcome, and sunlight can be utilized to the greatest extent, so that the reaction of photocatalytic decomposition of water to produce hydrogen under the irradiation of visible light is realized.

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 a preparation method of a catalyst for photocatalytically decomposing water to produce hydrogen based on CdS nano flower balls and ZnIn2S4 nanosheets. The preparation method comprises the following steps: using CdS nano flower balls and ZnIn2S4 nanosheets as components, and synthesizing a CdS / ZnIn2S4 nanocomposite material of the CdS nano flower balls and ZnIn2S4 nanosheets by a simple hydrothermal synthesis method. The CdS / ZnIn2S4 nanocomposite material prepared by the invention can effectively decompose water to produce hydrogen under visible light excitation; and has a regular morphology, is simple to prepare, is low in cost, and is suitable for large-scale promotion and application.

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 MIL-125-PDI / ZnIn2S4 heterojunction photocatalyst, which is a core-shell structure composed of MIL-125-PDI and ZnIn2S4 in a mass ratio of 1:2 to 5, wherein the core-shell structure is based on MIL-125-PDI and a surface of ZnIn2S4 nanosheets. The preparation method of the MIL-125-PDI / ZnIn2S4 heterojunction photocatalyst comprises the following steps: dispersing the MIL-125-PDI in a glycerol solution to obtain a suspension; adding a ZnIn2S4 precursor to the suspension, stirring and mixing, reacting in an oil bath, condensing and refluxing, cooling to room temperature, washing, and drying to obtain the MIL-125-PDI / / ZnIn2S4 heterojunction photocatalyst. The preparation raw materials of the invention are easily available and the preparation method is simple. The MIL-125-PDI / ZnIn2S4 heterojunction photocatalyst prepared in the present invention has high crystallinity, high yield and no other impurities are generated; it significantly broadens the light response range, enhances the generation, separation and transmission efficiency of photogenerated carriers, has excellent visible light catalytic performance, and has broad application prospects in the photocatalytic decomposition of water to produce hydrogen and synergistically remove antibiotics.

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 discloses a thermal insulation composite board for buildings and a processing technology thereof, and relates to the technical field of thermal insulation composite boards, the thermal insulation composite board comprises an outer protective layer, a thermal insulation layer, an intelligent response antibacterial layer and an inner protective layer which are arranged in sequence; the outer protective layer is a multifunctional polymer film with a self-healing function, and a nano array capable of photocatalytically decomposing organic pollutants is embedded in the surface of the outer protective layer; according to the invention, the intelligent response antibacterial layer has a multi-mechanism antibacterial function, so that the microbial biomass in a high-humidity environment is reduced by 99% or above, and the problems of structural damage and the like are avoided; the functional layers cooperatively guarantee performance, the outer protective layer is self-healing and clean, the inner protective layer adjusts humidity, and the electromagnetic adjusting layer stabilizes the electromagnetic environment; according to the processing technology, accurate parameter control, bionic bonding and electrical stimulation assembly guarantee that functional components are effective for a long time; the problems of microorganism breeding, single function and long-term antibacterial effect are comprehensively solved, and a high-quality composite board material is provided.

The invention provides a preparation method and application of a polycrystalline molybdenum carbide / cadmium sulfide composite catalyst. The material has excellent performance in the aspect of hydrogen production by photocatalytic decomposition of water. The preparation method comprises the following steps: firstly, taking melamine, cyanuric acid and ammonium molybdate as raw materials, and annealing in an inert atmosphere in a tubular furnace to prepare polycrystalline molybdenum carbide; then taking cadmium nitrate, thiourea and ethidene diamine as raw materials to hydrothermally prepare cadmium sulfide in a polytetrafluoroethylene high-pressure reaction kettle; and finally, dispersing the polycrystalline molybdenum carbide and cadmium sulfide in N, N-dimethylformamide, and carrying out ultrasonic treatment, stirring, washing and drying to obtain the polycrystalline molybdenum carbide / cadmium sulfide. According to the polycrystalline heterostructure disclosed by the invention, a channel for directionally and rapidly transferring current carriers is constructed, the separation of electron-hole pairs is accelerated, and the migration rate of electrons is improved; meanwhile, a molybdenum vacancy located at a crystal boundary forms a Lewis acid site serving as an active site of a hydrogen production reaction, so that an energy barrier of the hydrogen production reaction is reduced, and excellent performance of photocatalytic decomposition of water to produce hydrogen is shown.

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.