85results about How to "Photocatalytically active" patented technology

Disclosed is a photocatalyst with excellent, stable photocatalytic activity. The photocatalyst contains a crystal having a nasicon structure. Here, the nasicon structure is represented by AmE2 (XO4)3 (in the formula, a primary element A is one or more selected from the group composed of Li, Na, K, Cu, Ag, Mg, Ca, Sr and Ba; a secondary element E is one or more selected from the group composed of Zn, Al, Fe, Ti, Sn, Zr, Ge, Hf, V, Nb, and Ta; a tertiary element X is 1 or more selected from the group composed of Si, P, S, Mo, and W, and the coefficient is 0 or more, or 3 or less.)

The invention discloses a method for preparing a BiVO4 film with photocatalysis performance by using a sol-gel method. The method comprises the following steps of: respectively preparing a precursor solution A and a precursor solution B by taking bismuth nitrate pentahydrate (Bi(NO3)3.5H2O) and ammonium metavanadate (NH4VO3) as raw materials and taking citric acid as a solvent, preparing BiVO4 sol by mixing the precursor solution A with the precursor solution B; and coating the BiVO4 sol to a treated FTO (Fluorine-doped Tin Oxide) glass substrate surface in a spinning manner by adopting a spin coating method so as to form a film, and carrying out pre-annealing and annealing treatment on the film formed after spin coating, thereby obtaining the BiVO4 film fixed on the FTO glass substrate surface. According to the method for preparing the BiVO4 film with the photocatalysis performance by using the sol-gel method, the pure-monoclinic-phase BiVO4 film is prepared by combing the sol-gel method with the spin coating method, the prepared BiVO4 film has certain photocatalysis activity under visible light irradiation, meanwhile, the problem of immobilization of a BiVO4 photocatalyst is solved, and then, the separation, recovery and reuse of the BiVO4 photocatalyst are realized.

The invention provides composite photocatalytic fibers and a preparation method thereof. The preparation method includes: spinning a composite light catalyst and polyester polymer to obtain precursor fibers; performing exposing treatment on the composite light catalyst in the precursor fibers to obtain the composite photocatalytic fibers. The composite photocatalytic fibers have the advantages that the polyester polymer and the composite light catalyst are used as the raw materials, the raw materials are spun into the precursor fibers, and then the composite light catalyst in the precursor fibers is exposed to allow the fibers to have photocatalytic activity; experiment results show that the sulfaquinoxaline degradation rate of the composite photocatalytic fibers is quite high, and all sulfaquinoxaline can be degraded in about 2.5 hours; a circulation cycle lasts 5 minutes, and the composite photocatalytic fibers can still keep good degradation activity after 15 circulations.

The invention discloses a composite photo-catalyst material with a visible-light catalytic activity and a preparation method thereof, which is characterized in that 1 to 10 portions of dry titanium dioxide particles and 30 to 300 portions of chloroform are put into a single-neck flask with a drying tube, after being dispersed fully, 0.01 to 0.05 portion of conjugated polymer monomer which is put into the single-neck flask is stirred magnetically for 30 to 60 minutes, and then 0.1 to 5 portions of waterless ferric chloride which is put into the flask react for 4 to 8 hours under an ice bath, black solid products can be obtained after filtering, the black solid products are washed by methanol until the methanol is colorless, then products are dried in vacuum under a room temperature and the composite photo-catalyst material can be obtained. The composite photo-catalyst material obtained by adopting the preparation method of the invention can absorb visible lights, and is provided with the light catalytic activity under the radiation of the visible lights and can degrade organic pollutants effectively.

The invention discloses an environment-friendly release agent for fair-faced concrete and a preparation method thereof. The release agent is prepared from the following raw materials in percentage byweight: 35-45% of palm oil, 5-10% of an emulsifier, 0.2% of an antirust agent, 0.1% of a stabilizer, 0-8% of nano titanium dioxide and the balance of water. The preparation method of the release agentcomprises the following steps: 1) respectively mixing and uniformly stirring the emulsifier, the water and the palm oil to obtain two mixed solutions according to the emulsifying property of the emulsifier; and 2) uniformly mixing the two mixed solutions prepared in the step 1), sequentially adding an antirust agent, a stabilizer and nano titanium dioxide, stirring for 40-50 minutes at the temperature of 10-60 DEG C, and cooling to obtain the release agent. The release agent has the properties of low viscosity, good spreading uniformity, isolation lubrication and the like and can effectivelyeliminate bubbles on the surface of fair-faced concrete and stably and effectively ensure the appearance quality of the fair-faced concrete, and the fair-faced concrete after release has the advantages of good apparent quality, smooth appearance, small apparent pore size, small quantity, uniform color and small color difference.

The invention discloses a visible light-responsive layered titanic acid photocatalyst and a peroxidation modification method and application thereof, belonging to the field of photocatalytic materials. Add layered titanate white powder to H ₂ o ₂ After stirring and reacting in an aqueous solution, filter, wash with deionized water, and dry to obtain a yellow powder body of layered titanic acid photocatalyst responding to visible light. Visible-light-responsive TiO layered titanate photocatalyst ₆ There are Ti-O-O- coordination bonds between the octahedral layers. Compared with solid-phase high-temperature doping modification and heterogeneous semiconductor recombination, H ₂ o ₂ The peroxidation-modified layered titanic acid has the advantages of fast modification speed, simple process, easy control, and suitable for mass production. The TiO of the layered titanic acid photocatalyst of visible light response prepared by the inventive method ₆ There are a large number of Ti-O-O-coordination bonds between the octahedral layers, and its bandgap width is 2.2-2.5eV, which is stronger than the visible light catalytic activity of commercial titanium dioxide P25. Therefore, it is widely used in the degradation of environmental pollutants or organic matter. .

The invention provides colored photocatalysis fibers and a preparation method thereof. According to the invention, a polyester polymer and a composite photocatalyst are used as raw materials, and after the raw materials are spun into colored fiber protofilaments, the composite photocatalyst in the protofilaments is exposed by naking processing, so that the obtained colored photocatalysis fibers have the photocatalytic activity. Moreover, according to the invention, by adding a color master batch, when the colored photocatalysis fibers are guaranteed to have excellent photocatalytic degradationperformance, a problem of a single color of a catalytic functional textile is solved. An experiment result shows that the colored photocatalysis fibers provided by the invention have a very high degradation rate for methylene blue, and can enable the degradation rate for the methylene blue to reach 90% or higher within 140min.

The invention discloses a high visible-light catalytic activity material for a BiOCl/ZnO heterojunction and a preparation method thereof. The method comprises the steps of (1) preparing a solution A;(2) preparing a solution B; (3) mixing the solution A and the solution B to prepare into mixed liquor C; (4) dropwise adding a hexamethylenetetramine water solution into the mixed liquor C to obtain aflower-shaped BiOCl crystal; (5) respectively dissolving zinc acetate hexahydrate and hexamethylenetetramine into different deionized water to prepare into a solution I and a solution II; (6) mixingthe solution I and the solution II to form mixed liquor III; (7) uniformly mixing the mixed liquor III and BiOCl micro powder, reacting for 6 hours at 80 DEG C to 100 DEG C, naturally cooling after reaction, and washing, drying, cooling and grinding a product to obtain the high visible-light catalytic activity material for the BiOCl/ZnO heterojunction. The method is short in reaction time, mild inreaction condition and simple to operate. The BiOCl/ZnO heterojunction prepared through the method can absorb visible light, has photocatalytic activity of degrading rhodamine B under visible light,and has the characteristic of good photochemical stability.

The invention relates to a preparation method of novel cigarette filter tips which are non-toxic and can utilize sunlight to perform sterilization. A stable iron ion-doped TiO2 sol is prepared by adopting a Sol-gel method, ultrasonic treatment is performed to enable titanium dioxide particles to enter pores in bamboo charcoal, and the nanoscale titanium dioxide which has photocatalytic activity and is loaded on the bamboo charcoal is prepared after roasting. The purpose of preparing the novel cigarette filter tips which are non-toxic and can further utilize the sunlight to perform sterilization is achieved. The Fe<3+>/Ag/TiO2/bamboo charcoal composite material prepared by the preparation method disclosed by the invention has high-efficient sterilization capability under the sunlight in the situation that the adding amount of hydrogen peroxide is very small. Experiments show that, in a liquid phase, medical sewage containing more microbes is selected as a target object, the adding amount of the composite material is 20g/l, and most of the microbes can be removed after the sunlight is utilized for irradiation for 10 minutes.

The invention discloses a superhydrophilic self-cleaning coating sol formed by compounding titanium dioxide and inorganic polysilazane, and a preparation method and a use method thereof. The self-curing and strong-bonding superhydrophilic self-cleaning coating sol is prepared by compounding the titanium dioxide and inorganic polysilazane, and a coating formed by the coating sol has photocatalyticactivity and stable superhydrophilicity; and the preparation method has the advantages of simplicity, low cost, greenness, environmental protection, easiness in control of operating conditions, effectiveness in solving of the problems of poor photocatalytic activity and complex preparation technology of exiting coatings, and facilitation of promotion of the application and the development of a superhydrophilic technology.

The invention discloses high-permeability, high-weather-resistance and environment-friendly silicon-fluorine protecting liquid and a preparation method thereof. The high-permeability, high-weather-resistance and environment-friendly silicon-fluorine protecting liquid comprises 30-50wt% of small-molecule silane, 10-20wt% of fluoroalkyl siloxane, 0.5-3wt% of fluorosilane modified titanium dioxide, 1-3wt% of compound organic silicon emulsifier, 0.5-1.5wt% of fluorine-containing surfactant, 3-5wt% of silica sol and the balance deionized water. The high-permeability, high-weather-resistance and environment-friendly silicon-fluorine protecting liquid and the preparation method thereof have the advantages that the high-permeability, high-weather-resistance and environment-friendly silicon-fluorine protecting liquid is good and lasting in water resisting, oil resisting and fouling resisting function and excellent in permeability and weather resistance, and the appearance and breathability of the surface of a base material cannot be changed; in addition, the preparation method is simple in process, safe, environmentally friendly and free of odor, and the prepared the high-permeability, high-weather-resistance and environment-friendly silicon-fluorine protecting liquid is widely applicable to the water resisting and fouling resisting of base materials such as concrete, stone and GRC.

The invention discloses a preparation method and a using method of a graded hole TiO2 ceramic photocatalyst, and relates to a preparation method and a using method of a photocatalyst. Problems to be solved in the invention are that the TiO2 ceramic photocatalyst capable of removing organic pollutants in wastewater cannot be prepared within 4 hours-6 hours in the existing method, and time for degrading organic pollutants in the wastewater by using the existing TiO2 ceramic photocatalyst is long. The preparation method comprises the following steps of: roasting powder materials, deionized water, a foaming agent, a dispersing agent and a binding agent after mixing, ball-milling, injection-molding and drying to obtain the graded hole TiO2 ceramic photocatalyst. The using method comprises the following step of: adding the graded hole TiO2 ceramic photocatalyst in the wastewater to irradiate under ultraviolet light. The prepared graded hole TiO2 ceramic photocatalyst has characteristic of being short in time of degrading pollutants in the water. The graded hole TiO2 ceramic photocatalyst is used as the photocatalyst for removing the organic pollutants in the wastewater.

The invention discloses a preparation method of stannous oxide particles with photocatalytic activity.A hydrothermal method is adopted, stannous chloride serves as a tin source, strong base is used as a precipitator, and under the condition of an alcohol-water solution, the material is self-assembled into square-piece-shaped stannous oxide.The method is simple, effective, high in yield and low in cost and has good industrial development prospects, and industrial production is easily achieved.

A preparation method of hexagonal-prism-shaped Sm(OH)3 nanocrystalline comprises the steps that a solution A with the Sm<3+> concentration being 0.010-0.150mol/L is prepared by dissolving Sm(No3)3*6H2O in distilled water; a reaction precursor solution is formed by adjusting the pH value of the solution A to 7.0-11.0 through diethylenetriamine; the reaction precursor solution is poured into a hydrothermal synthesis reactor, the hydrothermal synthesis reactor is put in an electrothermal blowing dry box after being sealed, a reaction is conducted for 6-24 hours at the temperature of 50-120 DEG C, and after the reaction is finished, the hydrothermal synthesis reactor is naturally cooled to the room temperature; products are centrifugally washed for 4-6 times through distilled water and absolute ethyl alcohol, the products are collected and dried for 2-4 hours at the temperature of 60-80 DEG C in a vacuum mode, and the hexagonal-prism-shaped Sm(OH)3 nanocrystalline is obtained. According to the preparation method, instruments and equipment are simple, control is easy, operation is convenient, energy consumption is low, safety is good, and the hexagonal-prism-shaped Sm(OH)3 nanocrystalline prepared in the method is high in purity, strong in crystallinity, uniform in morphology, good in dispersity and controllable in grain growth.

The invention provides a preparation method of a photocatalyst capable of realizing photo-catalytic oxidation and reduction under irradiation of ultraviolet light, visible light and infrared light. Soluble silver salt, strong base and weak acid or soluble silver salt and strong alkali and weak acid salt adopt an ion exchange coprecipitation method or a hydrothermal method to prepare silver oxide precipitate, and the silver oxide precipitate is washed and dried to obtain the photocatalyst. The photocatalyst preparation method is simple, has good photocatalysis performance under irradiation of infrared light/visible light/ultraviolet light, is high in light degradation rate and stability and has a practical value and application prospect.

The invention discloses a method for microwave rapid synthesis of a lead, graphite oxide doped bismuth ferrite and foam nickel composite material and application thereof, and belongs to the technical field of synthetic materials. The method is as follows: (1) preparing a ferric nitrate, bismuth nitrate, lead nitrate and graphite oxide liquid mixture, ultrasonically treating, adding sodium hydroxide and nickel foam, and continuing to stir well for standby use; (2) performing microwave assisted hydrothermal synthesis in a microwave oven, after the reaction is finished, taking a product out, cleaning, and drying to obtain the lead, graphene doped bismuth ferrite and nickel foam composite catalytic material which can be used for treatment of degradation-resistant organic wastewater in Fenton-like and photocatalytic reaction systems, and can effectively reduce the content of TOC in the wastewater. During the preparation process of the lead, graphite oxide doped bismuth ferrite and foam nickel composite material, the microwave assisted hydrothermal method is used for one-step rapid synthesis of the bismuth ferrite based composite catalytic material, the advantages of non thermal effect and in situ growth ability of microwave can be fully used, the chemical synthesis reaction can be quickly and efficiently completed, the preparation time is greatly shortened, and the operation is simple, practical and convenient.

The invention relates to a preparation method for a dust inhibitor with photocatalytic activity and a spraying construction method. The preparation method for the dust inhibitor comprises the following steps: preparing sol A and a solution B, namely, stirring anatase type nano titania powder with water, performing ultrasonic treatment, leaving to stand, collecting supernate, and adding a 0.2-5% adhesive so as to obtain sol A, wherein the particle size of the nano titania powder is 1-100nm; sufficiently mixing 0.1-0.9 part by weight of calcium acetate and 0.1-0.9 part by weight of magnesium acetate with 300-100 parts by weight of water so as to obtain a calcium acetate magnesium solution, and putting 0.04-0.2 part by weight of dust inhibition aids into the calcium acetate magnesium solutionso as to obtain the solution B. By adopting the preparation method provided by the invention, a nano TiO2/CMA composite material with an efficient pollutant degradation property can be prepared, andthe composite material has a very good dust inhibition and adsorption property and photocatalytic activity under light radiation and is harmless to the environment.

The invention discloses a nano TiO2 modified fluorocarbon coating for fan blades and a preparation method thereof. The coating comprises a first component and a second component, the first component is prepared from, by weight, 30-75 parts of fluorocarbon resin, 1-8 parts of coalescing agent, 1-3 parts of silane coupling agent, 1-3 parts of isopropanol, 1-2 parts of ultraviolet light absorber, 0.5-1.5 parts of bentonite, 0.1-1.5 parts of leveling agent, 0.5-1 part of nano TiO2, 0.1-1 part of defoaming agent, 0.1-1 part of dispersing agent and 15-25 parts of water; the second component comprises a curing agent; and the mass ratio of the first component to the second component in the nano TiO2 modified fluorocarbon coating is (6-16):1. The nano TiO2 is dispersed into the fluorocarbon resin,so that the weather resistance and the adhesive force of the coating can be improved, and the obtained coating can be used for photocatalytic degradation of organic pollutants, and therefore, the blade coated with the coating has the advantages of freezing resistance, wear resistance, weather resistance, ultraviolet resistance and the like.

The invention belongs to the technical field of chemical sensing, and particularly relates to a method for visually detecting Cu < 2 + > based on GQDs photocatalysis. The invention provides a method for visually detecting Cu < 2 + > based on GQDs photocatalysis. The method comprises the following steps: preparing GQDs; preparing a sample solution; preparing standard solutions with different Cu < 2+ > concentrations; mixing to construct a sensing system; carrying out chromogenic reaction; carrying out colorimetric detection: determining the absorbance of the solution D at 650nm by using an ultraviolet spectrophotometer; making a standard curve; and determining the concentration of Cu < 2 + > in the to-be-detected water sample through the standard curve. In the method for visually detectingCu < 2 + > based on GQDs photocatalysis, a novel colorimetric platform is constructed by utilizing the photocatalytic activity of the GQDs, high sensitivity and selective sensing of Cu < 2 + > in anactual water environment can be realized, low-cost, rapid and on-site detection of a detection instrument is realized, and the method is simple to operate, economical, environment-friendly, rapid in detection, high in selectivity and high in sensitivity.

The invention discloses a preparation method of a phenolic resin photocatalyst and a sterilization and disinfection method of the phenolic resin photocatalyst on a water body, air or the surface of anobject. Under the irradiation of visible light or ultraviolet light or sunlight, the phenolic resin photocatalyst generates electron hole pairs and various free radicals, and the electron hole pairsand the free radicals act on bacteria on a water body, air or the surface of an object to destroy the structure of the bacteria so as to cause death of the bacteria. The invention also discloses a preparation method of the phenolic resin photocatalyst. The phenolic resin photocatalyst has the advantages that the synthesis process is simple, catalysts with strong acid and strong alkali are not needed, the reaction temperature is low, the corrosion resistance is strong, the phenolic resin has corrosion resistance, the price is low, the required raw materials are cheap, the photocatalyst has visible light activity, responds to visible light and does not need ultraviolet light as an excitation light source, the specific surface area is large, and the phenolic resin photocatalyst is particularly suitable for treating low-concentration bacterial liquid wastewater, such as water directly taken from natural water.

The invention relates to the technical fields of adsorption and catalysis, specifically to an adsorbent with photocatalytic activity, and a preparation method and an application thereof. The preparation method provided by the invention comprises the following steps: mixing sodium silicate and calcium hydroxide, and carrying out a hydrothermal reaction so as to obtain a mesoporous calcium silicatematerial with a surface rich in wrinkle structures; dissolving tetrabutyl titanate into ethanol so as to obtain a solution A; mixing acetic acid, water and ethanol so as to obtain a solution B; mixingthe mesoporous calcium silicate material with the solution B so as to obtain a system C; and dropwise adding the solution A into the system C, and sequentially carrying out aging, drying and calcining so as to obtain the adsorbent with photocatalytic activity. According to the invention, the mesoporous calcium silicate material with the surface rich in wrinkle structures is used as a carrier, andtitanium dioxide can be uniformly coated to the surface and internal pores of calcium silicate by a sol-gel method, so the loading capacity of titanium dioxide can be improved, and the adsorption efficiency, photocatalytic activity and catalytic decomposition effect of a material are greatly improved.

The invention discloses a method for preparing an iron-titanium-vanadium ternary inorganic polymeric flocculant based on a sulfuric acid acidolysis vanadium titano-magnetite two-step method, and belongs to the technical field of inorganic flocculant preparation. The method comprises the following steps: drying the vanadium titano-magnetite serving as a raw material, conducting grinding to form powder, putting the powder into a three-neck flask reactor, adding sulfuric acid to carry out acidolysis reaction, controlling the reaction temperature, the concentration of the sulfuric acid and the liquid-solid ratio, conducting reacting until liquid is completely volatilized, after the residual solid is off-white, and adding pure water with different volumes to carry out leaching under conditions of controlled leaching temperature and controlled leaching time, wherein the whole extraction process is carried out under normal pressure under magnetic stirring; and after the extraction reaction is completed, taking out the leachate in the reactor, carrying out suction filtration, adding sodium hydroxide with different volumes and specific concentrations for alkalization, further conducting aging, conducting storing in a glass container, and conducting storing at normal temperature. The method is stable in reaction, simple, rapid, easy to control and free of high temperature, the obtained inorganic polymeric flocculant is good in stability, the removal effect on organic matter is better than that of conventional aluminum and iron flocculants, cost is low, and the method has a certain application prospect in the area where vanadium titano-magnetite is convenient to transport.

The invention discloses a self-cleaning amphiphobic coating for degrading NO and a preparation method of the self-cleaning amphiphobic coating, and belongs to the field of photocatalytic degradation of NO. According to the preparation method of the self-cleaning amphiphobic coating for degrading NO, the amphiphobic coating capable of being used in a large area is prepared by adopting a simple spraying method, and aiming at the problem that the robustness of the amphiphobic coating is poor, epoxy resin with high bonding strength is introduced to improve the durability of the amphiphobic coating; the titanium dioxide nanotube has excellent photocatalytic activity and adsorption effect, and the titanium dioxide nanotube is introduced, so that the coating has excellent performance of photocatalytic degradation of NO; the one-dimensional structure of the titanium dioxide nanotube is beneficial to the construction of a nano hierarchical structure on the surface of the coating and the formation of a super-amphiphobic surface; and in order to solve the problem of ultraviolet stability of the coating, nano silicon dioxide is introduced, so that the situation that the epoxy resin is directly degraded by strong oxidizing groups generated by nano titanium dioxide nanotubes is avoided, the anchoring effect of nano titanium dioxide is improved, and the ultraviolet stability of the coating is greatly improved.