86results about How to "Photocatalytic" patented technology

The invention relates to modified tussah silk fabric with functionalized nanometer chitosan and nanometer titanium dioxide. The modified tussah silk fabric is prepared by the steps in sequence: weaving the tussah silk fabric by utilizing tussah filament, preparing finishing liquor and finishing tussah silk fabric; and the technical problems that the existing textile materials in the modification technology can not effectively improve the properties that the tussah silk fabric has damage to the environment, is easy to wrinkle, not anti-bacterial and easy to shrink, has poor dyeing property, poor comfortableness and function, and the like can be solved, the comprehensive properties that the tussah silk fabric is anti-wrinkle, soft, anti-bacterial, shrink-proof, self-cleaning and ultraviolet ray-resistant, as well as the adsorption efficiency of dye, and the like can be improved and enhanced, and the tussah silk fabric has the technical benefits of being lower in preparation cost, simple in process, environment-friendly and easy to realize, etc.

The invention discloses a method for preparing an inorganic particle/epoxy resin super hydrophobic film. The method is characterized by comprising the following steps: (1) preparing amination nano silica and nano titanium dioxide particle; (2) preparing coating sol; (3) coating the sol on a substrate material; (4) performing post-treatment on substrate material, and finally preparing the inorganic particle/epoxy resin super hydrophobic film. The method is simple in process and good in repeatability, and the prepared coating has excellent super hydrophobicity and self-cleaning property and is suitable for industrial production of super hydrophobic paint.

The present invention discloses a kind of inorganic disinfectant and its preparation process. The inorganic disinfectant consists of tourmaline 50-90 weight portions; photocatalytic material or nanometer TiO2, ZnO, CdO or SnO2, preferably nanometer anatase TiO 25-25 weight portions; compound RE salt or RE oxide of La, Ce, Nd, Sm, Pr, Eu or Y as the synergistic promoter 4-30 weight portions; and soluble metal oxide or metal salt 1-2 weight portions. The inorganic disinfectant has photocatalytic effect, negative ion releasing function, far infrared function and metal ion sterilization effect, so that it has synergistic disinfecting effect.

The present invention relates to a method for preparing tempered anti-bacterial self-cleaning glass. Said method utilizes one-step heat treatment process to make the titanium dioxide base film coated or plated on the glass surface be sintered and converted into anatase crystal type to implement glass tempering so as to obtain the transparent tempered bacteria-killing self-cleaning glass product with good photocatalytic activity photosuperhydrophilicity and anti-bacterial function. Besides, said invention also provides its application range.

The invention discloses a low-temperature preparation method of a TiO2-based organic/inorganic compound photocatalysis flexible film. The method comprises the following steps of: adjusting the pH value of a water solution containing a titanium salt with inorganic alkali; dissolving a regular titanic acid precipitate with hydrogen peroxide to obtain a clear and transparent titanium peroxide solution, heating or adding a catalyst for removing free oxygen from a titanium peroxide solution; mixing the solution with a polymer emulsion to obtain uniformly-mixed compound material emulsion; and forming a film on the surface of an organic flexible substrate, and performing thermal treatment to form a film material with a photocatalysis performance. The TiO2-based organic/inorganic compound photocatalysis flexible film has multiple functions of photocatalysis, antibiosis and super hydrophilicity; and in addition to the formation of a film on the conventional rigid substrate, a very good film forming condition is created particularly on the organic flexible substrate due to the adoption of a low-temperature preparation process, so that the application field of the film is greatly expanded.

A microbe reduced and noble metal modified TiO2 catalyst for catalytic degradation of phenol has a formula No-La/TiO2, where No is Ag and/or Pd. Its preparing process includes such steps as calcining TiO2, ultrasonic dispersing, adding it into the bottle containing microbe R08 and SH10, dark culture, impregnating in the solution of nitrate or chloride of noble metal, laying aside, washing, putting it in flowing N2, and carrying the nano-particles of noble metal by the í‹anchoríŒ and reducing action of microbes.

The invention discloses preparation and application of a nitrate treatment agent. The preparation method includes: taking cotton as the template, using coprecipitation process to synthesize biomorphiczinc titanium iron ternary hydrotalcite, and conducting roasting in a muffle furnace so as to obtain the nitrate treatment agent. The invention also provides application of the nitrate treatment agent prepared by the method in treatment of nitrate wastewater. The nitrate treatment agent prepared by the method has good adsorption effect on nitrate and is easy to separate, and has simple and feasible regeneration method, thus having broad application prospects in the field of nitrate wastewater treatment.

The invention discloses a water-based wood coating with antibacterial, anti-fouling, mosquito-repellent and insect-repellent effects, and preparation method thereof. The water-based wood coating comprises, by weight, 24-30 parts of water-based polyacrylate, 7-12 parts of water-based polyurethane, 1.5-2.5 parts of water-based fluorocarbon resin, 0.5-0.8 part of a cosolvent, 3-6 parts of deionized water, 1.0-2.5 parts of silicone oil, 0.1-0.3 part of nanometer zinc oxide, 0.6-1.0 part of multiply modified nanometer titanium dioxide, 0.05-0.15 part of a surfactant and 0.6-1.8 parts of anhydrous ethanol. The water-based wood coating of the invention has good antibacterial, anti-fouling, anti-insect and mosquito-repellent effects; and a paint film formed by the coating also has good adhesion, toughness, water resistance, wear resistance, weather resistance and the like.

The invention discloses a preparation method and application of water-soluble titanium dioxide nanoparticles. According to the preparation method, beta-cyclodextrin is used as an initial reaction material, a macroinitiator is synthesized by means of modification, a multi-arm star-shaped block copolymer is prepared by using an atom transfer radical polymerization (ATRP) technology and a technologywhich combines ATRP with 'click' chemistry, and the water-soluble titanium dioxide nanoparticles with uniform sizes and good dispersibility are prepared by taking the multi-arm star-shaped block copolymer as a monomolecular micelle template on the basis of a solution phase synthesis method. The titanium dioxide nanoparticles prepared by the preparation method are stable in quality, uniform in particle sizes, and can be stabilized at a nanoscale; the properties of the titanium dioxide nanoparticles can be effectively enabled to be exerted. The surfaces of the titanium dioxide nanoparticles aremodified, so that the titanium dioxide nanoparticles can be enabled to be evenly dispersed in water, and an aggregation effect is further avoided.

The invention relates to a thulium doped titanium sol and a method for degrading textile organic dirt under visible light, wherein the method comprises the following steps of: doping lanthanide thulium by using tetrabutyl titanate as a precursor and adopting a sol-gel method to prepare the thulium doped titanium sol, shaking the thulium doped titanium sol in a shaking bath pot for a certain period of time, placing at room temperature and ageing; enabling the sol to be adsorbed onto fibers by adopting an immersion method, drying and baking to enable the thulium doped titanium sol to form a film on the surface of textile fibers. The thulium doped titanium dioxide sol has simple preparation method, low-temperature operation and visible light response; the consolidated textile can decompose the organic dirt covered on the consolidated textile under the visible light, and the degradation ratio can reach more than 90 percent.

The invention discloses a nano composite stone material protection agent. A carbon nanotube-supported TiO2/tourmaline nano-composite modifier is added, wherein the TiO2 particles can reduce the scattering intensity of long wave ultraviolet ray and absorb short wave ultraviolet ray; nano SiO2 particles can absorb and reflect the ultraviolet ray, wavelength being less than 400 nm, and infrared ray,wavelength being larger than 800 nm, both absorption rate and reflection rate reaching more than 70%, so that anti-aging effect of the protection agent is greatly enhanced; meanwhile, the nano-particles have photocatytic function, so that organics can be decomposed at high efficiency. The protection agent is higher than hypochlorous acid in sterilization effect and is significantly enhanced in anti-bacterial corrosion property and improved in self-cleaning performance and adhesion force. Meanwhile, the hardness, anti-scrubbing effect and anti-wearing effect of a coating layer are enhanced by means of the carbon nanotubes and nano SiO2.

The invention relates to the technical field of membrane separation, and provides a preparation method of an MOFs-PVDF composite ultrafiltration membrane with a sterilization function. The preparation method comprises the following steps of: adding an MOFs material into an aqueous solution containing an iron source and a silver source, and stirring and mixing to obtain a precursor solution; adding a sodium hydroxide solution into the precursor solution, stirring, introducing oxidizing gas, filtering and drying to obtain a modified MOFs material loaded with AgO and FeOOH; and adding hydroxyl-containing PVDF, a modified MOFs material and a pore-foaming agent into an organic solvent to prepare a membrane casting solution, applying the membrane casting solution, and carrying out gel curing in a non-aqueous coagulating bath to obtain the MOFs-PVDF composite ultrafiltration membrane with a sterilization function. The MOFs-PVDF composite ultrafiltration membrane prepared by the method is good in hydrophilicity and strong in anti-pollution capability, has sterilization and antibacterial functions, and can be applied to the field of water treatment.

The invention belongs to the technical field of road materials, and particularly discloses a road guardrail coating capable of effectively purifying automobile exhaust gas. By using waste shells as raw materials, micron-sized porous shell powder sol is obtained by calcination, micro-etching and dispersion; by combining nanometer titanium dioxide, nanometer titanium dioxide modified micron-sized porous shell powder gel particles are obtained. The surface-adsorbed nanometer titanium dioxide has a photocatalytic effect, and is also commonly used as nanometer negative ion powder in coatings; the internal micron-sized porous shell powder has good adsorption. The road guardrail coating with the nanometer titanium dioxide and the micron-sized porous shell powder gel particles not only has the good photocatalytic effect, but also can degrade organic matter adsorbed on the surface of the coating; at the same time, the surface of the coating has an adsorption effect on the pollutants in the air, so that the air pollutants are concentrated in the radiation range of the nanometer negative ions, and thus the purification effect of the nanometer negative ion powder in the coating on the air is increased.

The invention discloses an antibacterial finishing coat for wood products, relating to the technical field of coatings. The antibacterial finishing coat is prepared from the following components in parts by weight: 40-60 parts of an acrylic emulsion, 2-10 parts of modified rosin resin, 0.1-0.5 part of nano-zinc oxide, 0.1-1 part of fluorine-carbon-modified acrylate flatting agent, 20-30 parts of hexamethylene diisocyanate, 2-5 parts of ethanol, 5-10 parts of pigments, 2-5 parts of bentonite, 8-10 parts of silicon dioxide, 1-3 parts of mineral oil and 5-10 parts of deionized water. Compared with existing woodware finishing coats, the antibacterial finishing coat has the advantages that the antibacterial effect is obvious, and the antibacterial rate reaches 100%.

The invention discloses a solar power and hydropower cogeneration system. The solar power and hydropower cogeneration system is mainly composed of a solar concentration catalyzing metal fuel cell stack, a tower type concentration bowl array, a layered groove disc concentration system, an embedded solar fiber distillation tower, a metal fuel regeneration electrolytic tank, a heat exchanger, a powerconverter and a control system, wherein the solar concentration catalyzing metal fuel cell stack is mainly composed of a metal anode, a diaphragm, a concentration catalyzing oxygen cathode, a cell case and the like; and the embedded solar fiber distillation tower is composed of a dark fiber yarn, a light guide fiber and transparent light emitting pipe, an overflow water distribution communicatingpipe, a liquidometer, a cobblestone, an extraction perforated pipe and the like. The invention further discloses a production method based on the solar power and hydropower cogeneration system. The solar power and hydropower cogeneration system and the production method are high in power generation efficiency, low in seawater desalination cost, good in water outlet quality, capable of saving energy and environmentally friendly.

The invention relates to a bismuth sulfide composite potassium tantalate niobate catalyst as well as a preparation method and application thereof. The general formula of the catalyst is x%Bi2S3/KTa0.75Nb0.25O3, wherein x is the molar ratio of Bi2S3 to KTa0.75Nb0.25O3 in the catalyst, and x is greater than or equal to 0.1 and less than or equal to 5. The KTa0.75Nb0.25O3 material is applied to piezoelectric catalysis and photocatalytic nitrogen fixation, and N2 is catalytically reduced into ammonia under the action of ultrasonic vibration or illumination. Due to the loading of Bi2S3, the piezoelectric catalysis performance and the photocatalytic ammonia synthesis performance of the KTa0.75Nb0.25O3 are further improved.

The invention relates to a preparation method of antifouling self-cleaning ceramic and belongs to the technical field of ceramic preparation. The method includes steps of: mixing a plurality types ofpottery clay, as raw materials, with water to prepare pottery clay slurry; mixing the pottery clay slurry with egg white and active sludge for fermentation; mixing the fermented product, potassium thiocyanate, sodium pyrophosphate and sodium carboxymethylcellulose to obtain a ceramic base material; injecting the ceramic base material into a mould and performing compression moulding, and sinteringthe product to obtain pre-sintered ceramic; finally performing impregnation to the pre-sintered ceramic with a tetrabutyl titanate and ethanol mixture liquid, adding water and performing an ultrasonicreaction; and calcining the product to obtain the antifouling self-cleaning ceramic. The ceramic has great antifouling performance and has extensive application prospect.