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13228 results about "Photo catalysis" patented technology

Graphene/silver phosphate composite visible light photocatalyst and preparation method thereof

The invention discloses a high-efficiency graphene/silver phosphate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of composite materials and environmental management photocatalysis. The preparation method comprises the following steps: dissolving graphene oxide in water, and carrying out ultrasonic treatment to obtain a graphene oxide dispersed liquid; dissolving silver nitrate in deionized water, gradually and dropwisely adding into the graphene oxide dispersed liquid while stirring to obtain a mixed solution, uniformly stirring, and aging; dropwisely adding a prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the graphene oxide-silver nitrate mixed solution, continuing stirring, transferring into a hydrothermal reaction kettle, carrying out hydrothermal reaction, and cooling to room temperature; and washing the reaction product, and carrying out vacuum drying to obtain the visible light photocatalyst. The invention has the advantages of wide material sources and simple preparation process; and the obtained composite material has the advantages of controllable structure and regular pattern, and has high-efficiency degradation effect on organic dyes rhodamine B and methylene blue with certain concentration under the visible light irradiation.
Owner:JIANGSU UNIV

Photocatalytic type self-repairing super-hydrophobic coating and preparation method thereof

The invention belongs to the technical field of new chemical materials and relates to a photocatalytic type self-repairing super-hydrophobic coating and a preparation method thereof. The coating comprises the following materials: 10-50 percent of thermoplastic film-forming resin, 5-20 percent of low-surface energy material, 1-10 percent of photocatalytic active nano particles, 5-40 percent of hydrophobicity nano particles and 20-60 percent of organic solvent. The preparation method comprises the following steps: firstly, allowing nano particles to be subjected to fluorosilane modification to obtain the hydrophobicity nano particles; then, weighing all components of the coating for mixing, and performing high-speed shearing dispersing to obtain the coating provided by the invention. The coating can be applied to the surfaces of base materials such as steel material, aluminium alloy, plastic and composite in the way of brushing, spraying and the like, and a lotus leaf type super-hydrophobic coating can be obtained through drying. The coating can realize super-hydrophobic self-repairing through UV irradiation after being polluted by organic pollutant or subjected to mechanical wear by external forces, so that the coating has extremely good super-hydrophobic performance and perdurability, and the long-term using performance under the outdoor environments is also ensured.
Owner:FUDAN UNIV

Copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst

The invention discloses a copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst as well as a preparation method and an application thereof, and belongs to the technical field of material preparation and photocatalysis. The graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst which adopts a nanosheet structure and synthesized with a copolymerization method is formed by taking urea and different small organic molecule monomers as precursors through the high-temperature copolymerization action. The prepared graphite-phase carbon nitride has a lower-dimension nanosheet microstructure and a proper band gap; compared with conventional bulk-phase carbon nitride, the graphite-phase carbon nitride effectively increases the specific surface area, enhances the utilization rate of sunlight, and has efficient photocatalysis hydrogen production performance in visible light. According to the copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst, the synthetic process is simple, the cost is low, the catalytic efficiency is high, the actual production requirements are met, and the photocatalyst has broad application prospects in the field of photocatalysis.
Owner:FUZHOU UNIV

Omnidirectional antibacterial intelligent type air purifier for vehicle

The invention relates to an omnidirectional antibacterial intelligent type air purifier for a vehicle, which comprises a shell, an air purification component, a fan power component, an energy component, an induction sensor component, a negative-ion generator and a display intelligent control component. The omnidirectional antibacterial intelligent type air purifier for the vehicle uses a nano silver modified titanium dioxide as a photocatalyst, thereby increasing photocatalysis effect and sterilization antibacterial performance. The omnidirectional antibacterial intelligent type air purifier for the vehicle uses an ultraviolet light emitting diode as a ultraviolet light source, thereby guaranteeing the photocatalyst to be capable of playing the role of degrading pollutants efficiently. The inner surface and the outer surface of an enclosure all have antibacterial performance, thereby guaranteeing bacteria not to live on the surface of an airframe of the omnidirectional antibacterial intelligent type air purifier for the vehicle, and guaranteeing personal safety. The omnidirectional antibacterial intelligent type air purifier for the vehicle can automatically induct air conditions, adjusts purification power in real time, and has intelligent control function.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH

Method for preparing concavo-convex rod soil/zinc oxide nanometer composite material

The invention discloses a method for preparing concavo-convex rod soil/zinc oxide nanometer composite materials, which comprises the following steps: purifying and dispersing the concavo-convex rod soil in water to prepare concavo-convex rod soil dispersion liquid; then adjusting the temperature of the concavo-convex rod soil dispersion liquid to 30 to 100 DEG C; agitating the concavo-convex rod soil dispersion liquid dispersion liquid and while adding zinc salt aqueous solution with the concentration of 0.3 to 3 mol.L<-1> and carbonate aqueous solution with the concentration of 0.3 to 2 mol.L<-1> to the concavo-convex rod soil dispersion liquid dispersion liquid; and keeping the pH value of mixed liquid within the range of 6.0 to 8.0. The prepared mixed serous fluid comprising the prepared nanometer concavo-convex rod soil and basic zinc carbonate is filtered; and a filter cake is washed by deionized water; when the electrical conductivity of filtrate is less than 300 MuS.cm<-1>, the washing is finished; and the filter bake obtained is dried at the temperature of below 100 DEG C, then baked for 1 to 10 hours at the temperature of 300 to 600 DEG C, and finally crushed. The invention is simple and has the advantages of low energy consumption and high safety; the load of the adsorbing material prepared is uniform and has good dispersibility, strong adsorbability and remarkable photo-catalyzed degradation property.
Owner:JIANGSU POLYTECHNIC UNIVERSITY +1

Preparation method and use of hydrophilic automatically-cleaning coating with photocatalytic activity

The invention provides a preparation method of a hydrophilic automatically-cleaning coating with photocatalytic activity, and belongs to the technical field of chemical engineering. The preparation method is characterized in that butyl titanate and ethyl orthosilicate are utilized as precursors; nanoscale TiO2 / SiO2 sol is formed through a sol-gel method; and the nanoscale TiO2 / SiO2 sol is coated on the surface of an object and is naturally dried at normal temperature to form an anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity. When the anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity is coated on a solar photovoltaic panel, a vehicle window glass plate or a building glass plate at a normal temperature, the anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity can fast form a hydrophilic coating. Under natural light irradiation, the hydrophilic coating can decompose greasy dirt adhered to the hydrophilic coating into inorganic pollutants, and through rainwater flushing or artificial washing, the inorganic pollutants are removed so that the solar photovoltaic panel or the vehicle window glass plate or the building glass plate is kept as clean as a new one for a long time. The preparation method provided by the invention reduces a production management cost and improves solar photovoltaic panel generating efficiency.
Owner:NORTH WEST YONGXIN GROUP

Bifunctional micro-encapsulation phase-change energy storage material with photo-catalysis property and preparation method thereof

ActiveCN103992773AImprove phase change energy storage and energy saving technologyWith automatic temperature controlBiocideWater/sewage treatment by irradiationAlkaneBifunctional
The invention discloses a bifunctional micro-encapsulation phase-change energy storage material with a photo-catalysis property and a preparation method thereof. A core material of the bifunctional micro-encapsulation phase-change energy storage material is a phase-change material such as high-grade aliphatic alkane, alcohol, acid, acid ester and the like, and a wall material of the bifunctional micro-encapsulation phase-change energy storage material is crystalline titanium dioxide or element-doped crystalline titanium dioxide with the photo-catalysis property. The preparation method comprises the steps of mixing and stirring 2.0-3.4wt.% of surfactant, 79.0-80.0wt.% of solvent, 6.0-10.0wt.% of phase-change energy storage material and 4.5-8.5wt.% of titanium source in percentage by weight to form a stable emulsion; adding mixed liquid of the solvent and water to initiate reaction; then adding 0.0-3.0wt% of crystallization induction additive in percentage by weight to obtain the micro-encapsulation phase-change energy storage material of a crystalline titanium dioxide coated organic phase-change material. The micro-encapsulation phase-change energy storage material of an element-doped crystalline titanium dioxide coated organic phase-change material can be obtained by adding a product into a metal solution or non-metal solution while stirring.
Owner:上海弈峋科技有限公司

Supported TiO2 photocatalyst, its preparation method and photocatalytic water purifier

The invention relates to a carrier-type TIO2 photo-catalyst, it's preparing method, and a high-absorbability photo-catalysis water purifier made from said material. Said carrier-type TIO2 photo-catalyst uses active carbon fiber base as substrate, which carries 100-600mgTIO2 / g active carbon fiber to form the TIO2 film in 100-300nm thick and the specific surface area in 150-400m2 / g. Said catalyst can be attained by powder plating method, liquid deposition method and sol-gel method of adhesive agent. The invention can keep the former space between active carbon fibers with the advantages that the liquid can freely enter the inner part of photo-catalyst and the ultraviolet light can radiate the inner part of photo-catalyst. The photo-catalysis water purifier with aforementioned carrier-type TIO2 photo-catalyst is in the shape of rectangle, while several photo-catalyst elements with said catalyst are inserted into the slot of purifier, the aeration system on the bottom can mix the treating liquid with air to reduce the mass transfer limit. Said purifier can effectively absorb the action bottom material; and improve the photo-catalysis process to apply the deeply-purification treatment of micro-pollution water.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Carbon nitride/titanium dioxide nanosheet array heterojunction photocatalyst and preparation method

The invention relates to a carbon nitride/titanium dioxide nanosheet array heterojunction photocatalyst and a preparation method, belonging to the technical field of photocatalysis of nanometer materials. The catalyst is prepared through the following steps: with g-C3N4 as a carrier, titanium isopropoxide as a titanium source, diethylenetriamine as a morphology controlling agent and isopropanol as a solvent, performing a solvothermal method so as to prepare a g-C3N4/TiO2 precursor, and carrying out calcination treatment so as to obtain a g-C3N4/TiO2 nanosheet array heterojunction composite photocatalyst for the first time. The heterojunction composite photocatalyst shows pure and significantly-improved photocatalytic hydrogen production activity to g-C3N4 and anatase TiO2 nanosheet mesoporous spheres in a photocatalytic hydrogen production reaction. The preparation method has the advantages of simple and convenient operation, easy control, greenness, environmental protection and good application prospects. The series of catalysts has multilevel structure; and a g-C3N4/TiO2 nanosheet array heterojunction structure is formed through vertical and staggered growth of anatase TiO2 nanosheets with regular shape and uniform size on the surface of g-C3N4. The catalyst has excellent photocatalytic hydrogen production activity, good stability, high repeatability and facilitation large-scale production.
Owner:BEIJING UNIV OF CHEM TECH
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