67results about How to "Reduce photocatalysis" patented technology

Provided are a compound type photocatalyst air purification waterborne interior wall coating and a preparation method thereof. The compound type photocatalyst air purification waterborne interior wall coating comprises, by weight, the following materials of 5.5-22.3% of photocatalysis packing, 25-65% of polyurethane emulsion, 1-6% of propylene glycol phenylate, 2-6% of dispersing agents, 2-4% of stabilizing agents, 1-2% of wetting agents, 20-60% of water, 1.5-4% of mildewproof agents, 1-2% of antifoaming agents, 0.5-2% of flatting agents, and 0.5-1% of thickening agents. The photocatalysis packing is formed by complexation of nanoanatase type titanium dioxide and nano-zinc oxide or nano stannic oxide according to a weight ratio of 5-9:1-5. The coating has good air purifying capacity, and can effectively degrade harmful gases in the air and kill bacterial viruses under excitation of ultraviolet light. As an interior decorative material, the coating has good covering power and adhesive power and excellent stability. The coating and the production method are simple in production process, suitable for various coating methods, and easy to popularize and apply.

The present invention relates to one kind of transparent composite epoxy material and its preparation process and use. The transparent composite epoxy material has nanometer composite inorganic stuffing comprising nanometer silica particle serving as core, titania serving as shell coating the silica particle core and outer silica layer coating the titania shell. The transparent composite epoxy material possesses high transparency, excellent ultraviolet ray shielding effect, high ultraviolet ray tolerance, low heat expansion coefficient, high heat conductivity and other advantages, and is suitable for use in pacing LED and other light emitting semiconductor devices.

The invention discloses photocatalyst-supported hydrogel as well as a preparation method and an application thereof and belongs to the field of environment function materials and catalysis. The photocatalyst-supported hydrogel comprises a conventional hydrogel composite conductive material and a photocatalysis material, wherein conventional hydrogel comprises acyclic acid/acrylamide hydrogel and can also be hydrogel formed through polymerization of other monomers. The conductive material comprises graphite, graphene and the like, and a photocatalyst can comprise bismuth oxychloride, titanium dioxide and the like. Bismuth oxychloride is immobilized, and the photocatalysis properties of bismuth oxychloride and electrical stimulation responsiveness of the hydrogel are combined. The conductive material in the compound hydrogel can transfer photo-induced electrons produced by bismuth oxychloride under illumination, the mass transfer rate between a catalyst and a pollutant cannot be affected, and the photocatalysis performance of bismuth oxychloride is improved. The synthesis method is simple and efficient, can realize industrial production and can be used for degrading atenolol, other medicines, personal care products and other organic pollutants in water.

The invention discloses a method for preparing a titanium dioxide/bamboo charcoal composite material. The titanium dioxide/bamboo charcoal composite material is prepared by using bamboo charcoal as the carrier and n-tetrabutyl titanate as the titanium source and through assisting by a microwave process. During microwave heating, large and small particles in the material are simultaneously and fast heated, thereby reducing thermal stress and further avoiding the breakage of the material, improving the microstructure of the material, uniformly loading active components on the carrier and improving the photocatalysis property of the material used in the field of sewage disposal with photocatalysis oxidization process. According to the detection of X-ray diffraction, the TiO2 loaded in the composite material is mainly of anatase type. The method solves the problems that the preparation of the titanium dioxide/bamboo charcoal composite material is time-consuming and costy, uniform titanium dioxide/bamboo charcoal composite material is difficult to prepare and carbon pollution is easily caused during the sintering.

The invention discloses nano ferric hydroxide and a preparation method thereof. The shape of nano ferric hydroxide is a nano-sheet cluster, wherein the cluster diameter of the nano-sheet cluster is between 400 and 500nm, and the sheet length of nano-sheets forming the nano-sheet cluster is between 200 and 250nm, and the sheet width is between 20 and 25nm, and the sheet thickness is between 2 and 5nm; the nano-sheet cluster is formed by orthorhombic system alpha-ferric hydroxide, and the specific surface area of the nitrogen adsorption and desorption representation is between 100 and 105m<2>/g. The method comprises the following steps of: mixing ethylene glycol and deionized water, and performing ultrasonic to prepare ethylene glycol aqueous solution; respectively adding ferrous sulfate into the ethylene glycol aqueous solution, and performing ultrasonic to obtain ferrous sulfate mixed solution; adding urea into ethylene glycol aqueous solution, and performing ultrasonic to obtain urea mixed solution; injecting the urea mixed solution into the stirring ferrous sulfate mixed solution at a speed of 0.8-1.2ml/min according to a volume ratio of (0.8-1.2):3 to prepare a reaction solution; and injecting air into the reaction solution at a speed of 2.5- 3.5ml/min to prepare the target product. The nano ferric hydroxide can be widely applied to adsorption and photocatalytic decomposition of organic matters.

The invention discloses an I-doped BiOClBr photocatalyst of a three-dimensional structure. The preparation method of the catalyst comprises the following steps of: putting glycol in which required amount of Bi(NO)3, KCl, NaBr and KI are dissolved at high temperature and high pressure for reaction, centrifugally separating solid products after the reaction, washing and drying the separated and purified solid products so as to obtain the expected product. Compared with the conventional BiOX(X=Cl, Br and I) monomer, the doped BiOClBr photocatalyst of the three-dimensional structure is beneficial to the generation of photoproduction electron-hole pairs and the increase of specific surface area and can more effectively increase the probability that a catalyst is contacted with decomposition dye, and moreover, the recycling of the catalyst is facilitated. The preparation method disclosed by the invention is simple in material, simple and convenient in process operation, free of complex synthesis equipment and low in cost.

The invention provides an air cleaning agent containing a catalytic agent, and relates to the technical field of environment-friendly material air cleaning. In order to solve the technical problems that an existing air cleaning agent containing a photocatalyst on the market has a single function and poor in weather fastness, cannot achieve purification or freshness for a long time, and is low in cleaning efficiency, the air cleaning agent containing the catalytic agent is prepared, the air cleaning agent adopts the catalytic agent as a main purification object, natural plant components and other auxiliaries are adopted, the air cleaning agent is prepared through the reasonable proportion, use is safe and convenient, the performance of the components are brought into full play and utilized,photocatalyst particles have the good weather fastness and can have the maximum purification effect in actual application, formaldehyde and other hazardous gas in air can be effectively removed, andthe deodorization, sterilization and anti-fouling performance can be achieved.

The invention discloses a fish scale tubular carbon nitride composite heterojunction photocatalyst as well as a preparation method and application thereof. The catalyst takes fish scale tubular carbon nitride as a framework, and the surface of the catalyst is modified with ZnIn2S4 with the mass percentage of less than or equal to 50%. The preparation method comprises the following steps of sequentially adding ZnCl2, InCl3 and thioacetamide into a suspension of fish scale tubular carbon nitride and water, and carrying out hydrothermal reaction on an obtained precursor solution to obtain the catalyst. The fish scale tubular carbon nitride composite heterojunction photocatalyst has the advantages of strong light absorption capability, low photo-induced electron-hole recombination rate, good photocatalytic performance, good stability and the like, is a novel carbon nitride photocatalytic material, can be widely used for photocatalytic removal of organic pollutants and preparation of H2O2, has a good application prospect. The preparation method has the advantages of simple process, easily controllable conditions, low cost and the like, is suitable for large-scale industrial production, and is beneficial to industrial application.

The invention discloses a preparation method of a non-precious metal transition element sulfide-based efficient photocatalyst. The preparation method comprises the following steps: by taking inorganic cobalt salt, tin salt, sodium citrate, sodium hydroxide and a sulfur source as raw materials, carrying out a coprecipitation method and hydrothermal reaction to prepare a bimetallic sulfide photocatalyst; and preparing a multi-layer structure by adding sodium hydroxide with different concentrations through the coprecipitation method, and changing a ratio of the cobalt salt and the tin salt to prepare the efficient bimetal based sulfide photocatalyst with a most appropriate ratio. The preparation method has the characteristics of simpleness, efficiency, environmental protection, controllability, low cost and the like. The prepared bimetallic sulfide photocatalyst is in a shape of regular hexahedron and has the characteristics of high stability, large specific surface area, high catalytic activity and the like.

The invention relates to nano titanium dioxide sol for a perovskite solar cell and a preparation method of a skeleton membrane. Large-particle size nano SiO2 sol and a small amount of small-particle size organic silicon nano resin sol are added to small-particle size nano TiO2 sol; small-particle size nano TiO2 and large-particle size nano SiO2 are subjected to copolymerization reaction and coat the surfaces of large-particle size nano SiO2 particles to form core-shell structure nano TiO2 particles; and a small amount of small-particle size organic silicon nano resin further partially coats the core-shell structure nano TiO2 particles, so that the small-particle size organic silicon nano resin is firmly bonded to the surface of a substrate material and is combined to form the core-shell structure nano TiO2 skeleton membrane. By core-shell structure nano TiO2 particles, the contradiction between the adhesive force and the pore capacity of the nano TiO2 skeleton membrane is avoided; a flexible molecular group is introduced into the skeleton membrane; and high adhesive force of a membrane layer is further enhanced, so that the high-temperature sintering process of the nano TiO2 skeleton membrane is omitted.

A preparation method of antibacterial ABS resin comprises the steps: a, mixing and stirring a zeolite powder and nano titanium dioxide, stirring and mixing for 3-5 minutes at room temperature at the speed of 90-140 rpm, and drying; b, adding the zeolite powder and nano titanium dioxide mixed material of the step a and ABS into a stirrer, at the same time, adding nano silver oxide and polyhexamethylene guanidine phosphate to the stirrer, stirring and mixing for 20 minutes at room temperature at the speed of 60 rpm in the stirrer to obtain an ultimate mixture; and c, adding the ultimate mixture obtained after stirring in the step b into a twin-screw extruder with the processing temperature of the twin-screw extruder of 200 DEG C and the main engine speed of 320 rpm, drawing rods through extrusion, air-drying, and sized-dicing to obtain the antibacterial ABS resin. The antibacterial ABS resin has the beneficial effects that inorganic sterilization adopts combination of a titanium dioxide photocatalytic technology and silver ion sterilization, moreover, potent bactericidal polyhexamethylene guanidine phosphate is adopted, inorganic sterilization and organic sterilization are combined, and thus the sterilization effect is greatly improved.

The invention discloses a preparation method for a hollow titanium dioxide @ silicon dioxide/water-based polyurethane composite transparent and thermal insulation coating. Hollow titanium dioxide @ silicon dioxide microspheres are added to a mixed liquid formed by ethanol and water, the mixed materials are dispersed uniformly under ultrasonic, and therefore a hollow titanium dioxide @ silicon dioxide microsphere suspension liquid is obtained; and then the hollow titanium dioxide @ silicon dioxide microsphere suspension liquid is added to water-based polyurethane, stirring is performed uniformly under the temperature of 60-90 DEG C, and therefore the hollow titanium dioxide @ silicon dioxide/water-based polyurethane composite transparent and thermal insulation coating is obtained. Accordingto the invention, the thermal conductivity of the composite transparent and thermal insulation coating prepared by the invention is reduced by 31.24% compared with that of a pure water-based polyurethane coating, the light reflectivity is improved by 487.5%, when the wavelength is 340nm or less the ultraviolet transmittance is zero, the visible light transmittance can be up to 80%, the water resistance is increased by 12.56%, the tensile strength is improved by 35.69%, and the elongation at break is increased by 29.49%.

The invention discloses a preparation process of environment-friendly water-based ink. The preparation process comprises the following steps: step 1, weighing raw materials; step 2, adding deionized water into a dispersion cylinder, then adding a pigment, carrying out ultrasonic treatment at normal temperature for 10 minutes to prepare an aqueous dispersion liquid of the pigment, then adding a wetting agent and half of a dispersing agent, and carrying out high-speed dispersion and grinding to obtain color paste; and step 3, mixing the color paste with the polyacrylate emulsion, and adding a modified filler, a dispersing agent and a defoaming agent to obtain the environment-friendly water-based ink. According to the invention, the water-based polyacrylate emulsion is used as a film-formingsubstance of the ink; the emulsion has high film-forming property and adhesive force; by adding the modified filler, the phenomenon of ink aging caused by ultraviolet rays can be effectively prevented, the damage caused by the ultraviolet rays to an organic resin base material is reduced, and the water-based ink has water resistance and ultraviolet-resistant stability at the same time; the raw materials are green and environment-friendly, and the water-based ink which is environment-friendly, excellent in comprehensive performance and capable of effectively defending ultraviolet rays is obtained.

The invention discloses a silver phosphate/bismuth sulfide/bismuth oxide double-Z-type photocatalyst and a preparation method thereof. The silver phosphate/bismuth sulfide/bismuth oxide double-Z-typephotocatalyst takes bismuth oxide as a carrier, and the surface of the bismuth oxide is modified by bismuth sulfide and silver phosphate. The preparation method includes the steps: preparing mixed solution of bismuth oxide and thiourea; performing hydrothermal reaction on the mixed solution of the bismuth oxide and the thiourea to prepare a bismuth sulfide/bismuth oxide compound; mixing the bismuth sulfide/bismuth oxide compound and Ag+ solution, and adding HPO4<2-> solution to perform precipitation reaction to prepare the silver phosphate/bismuth sulfide/bismuth oxide double-Z-type photocatalyst. The silver phosphate/bismuth sulfide/bismuth oxide double-Z-type photocatalyst has the advantages of high absorption capacity, low light-generated electron-hole recombination rate, good photocatalytic performance and stability and the like. The photocatalyst is a novel photocatalytic material, and the preparation method of the photocatalyst has the advantages of simple process, easily controlled condition, low cost and the like and is suitable for large-scale industrial production.

Sterilizing polyester resin includes the following components, by weight, 95 parts of PBT, 5 parts of PET and 0.2-0.4 parts of a composite antibacterial agent which is composed of zeolite powder, nano titanium dioxide, nano silver oxide and polyhexamethylene guanidine phosphate. The antibacterial ABS resin has the following advantages: 1) with the zeolite powder as the carrier for supporting the nano titanium dioxide and the like, the nano titanium dioxide is free of caking, which reduces the effect of photocatalysis; and 2) a titanium dioxide photocatalysis technology and silver ion sterilization are combined for inorganic sterilization, and as well as the polyhexamethylene guanidine phosphate which has strong sterilization effect, so that the sterilization effect is greatly improved due to combination of both inorganic and organic sterilization.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a silver nanorod and titanium dioxide composite material as well as a preparation method and application thereof. The silver nanorod and titanium dioxide composite material comprises silver nanorods and titanium dioxide particles, wherein the titanium dioxide particles are partially grown in situ on the surfaces of the silver nanorods, and the other part of the titanium dioxide particles is dispersed in gaps between the silver nanorods; the weight ratio of the silver nanorods to the titanium dioxide is (0.0025-1):1. The invention provides the silver nanorod and titanium dioxide composite material which can effectively degrade a gaseous pollutant photocatalytically, and the preparation method and application thereof.

The invention discloses a method for utilizing a carbon nitride/nitrogen doped mesoporous carbon/bismuth trioxide ternary Z-type light catalyst to catalyze and remove antibiotics. The method adopts the hollow carbon/nitrogen doped mesoporous carbon nitride/bismuth trioxide ternary Z-type photocatalyst to treat antibiotics, the hollow carbon/nitrogen doped mesoporous carbon nitride/bismuth trioxideternary Z-type photocatalyst uses graphite-phase carbon nitride as a carrier, and its surface is modified with nitrogen doped hollow mesoporous carbon and bismuth oxide. The method utilizes the carbon nitride/nitrogen doped mesoporous carbon/bismuth trioxide ternary Z-type light catalyst to conduct photocatalytic degradation on the antibiotics, can effectively remove different types of antibiotics, has the advantages of high removal rate, quick removal, easy implementation, high safety, low cost, no secondary pollution and the like, in particular can achieve efficient removal of antibiotics in water and has a very good practical application prospect.

The invention discloses a magnetic molecular sieve loaded TiO2 composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: mixing deionized water, white carbon black, aluminum sulfate, sodium hydroxide and a template agent in proportion, conducting uniform stirring at normal temperature to prepare a molecular sieve precursor, adding nano Fe3O4 into the precursor, carrying out ultrasonic treatment, and putting a treated material into a reaction kettle to carry out hydrothermal synthesis to obtain a magnetic molecular sieve; then with tetrabutyl titanate as a titanium source, adding the magnetic molecular sieve before sol-gel hydrolysis, then adding glacial acetic acid to promote gelling, conducting aging at room temperature after gelling is finished, then putting a formed product into a drying oven for drying, conducting grinding to form a powder, and putting the powder into a tube furnace for calcining under nitrogen protection, so asto obtain the magnetic molecular sieve loaded TiO2 composite photocatalyst. Through three-phase compounding of TiO2, Fe3O4 and SSZ-13 molecular sieves, the light absorption capacity of the catalyst is improved, compounding of photo-induced electrons and holes is reduced and inhibited, and the photocatalytic efficiency is improved; and due to the introduction of Fe3O4, the material can be repeatedly used after being magnetically separated and recycled.

The invention discloses a cerium aluminum terbium rare earth light stabilizer and a preparation method thereof. The cerium aluminum terbium rare earth light stabilizer comprises 15 to 65 parts by weight of CeO2, 30 to 82 parts by weight of Al2O3 and 0.1 to 10 parts by weight of Tb4O7. The cerium aluminum terbium rare earth light stabilizer of the invention has a broad-spectrum ultraviolet shielding function, superior light stability and good compatibility with an organic polymer material matrix.