76results about How to "Good photocatalysis" patented technology

The invention discloses a hierarchy MoS2 / Cu2S composite material. The hierarchy MoS2 / Cu2S composite material is a micro-nano sphere with a flower-like structure formed by assembling MoS2 nanosheets and Cu2S nanosheets and is obtained by carrying out hydrothermal reaction on a molybdenum source, a sulfur source, a copper source and a reducing agent which serve as raw materials. The MoS2 / Cu2S composite material disclosed by the invention is prepared by using a hydrothermal method, and has the advantages of wide source of the related raw materials, low cost, simple and feasible technology and high yield; the difficult point that MoS2 is difficultly compounded with other materials at present can be solved; besides, the problem of low conductivity of the MoS2 in the catalytic reaction process also can be solved; the obtained composite material shows excellent photocatalytic performance and excellent electrocatalytic performance and is suitable for being popularized and applied.

The invention relates to a titanium carbide in-situ growth CNTs three-dimensional composite with polydopamine serving as a transition layer and a preparation method thereof. The method includes the steps that Ti3C2 nano-powder and dopamine hydrochloride are dispersed into ultrapure water respectively, even mixing is conducted, and stirring is conducted under the shading condition; a Tris- buffer solution is added, and stirring continues under the shading condition; the obtained mixed solution is subjected to separation, washing and drying, and Ti3C2@PDA nano-powder is obtained; the Ti3C2@PDA nano-powder is added into ultrapure water, Co(NO3)2.6H2O is added after uniform dispersion, and stirring is conducted for a reaction; urea is added after the reaction is finished, stirring is continuously conducted under a constant temperature to evaporate water, and precursor powder is obtained; the precursor powder is subjected to heat treatment, and the titanium carbide in-situ growth CNTs three-dimensional composite with polydopamine serving as the transition layer is obtained. The Ti3C2@PDA@CNTs three-dimensional composite is successfully prepared through a simple pyrolysis method.

The invention provides a titanium dioxide hollow nanosphere and a preparation method thereof. Firstly, a micro-emulsion method is utilized to compound organic hybridization silica nanosphere to provide a template for compounding the titanium dioxide hollow nanosphere. According to the invention, titanium diisopropoxide bis(acetylacetonate) is used as a titanium source to cladding a titanium dioxide shell; the uniform cladding of the titanium dioxide shell on the outer layer of O-SiO2 nano-particles is realized when an isopropanol solution of the titanium diisopropoxide bis(acetylacetonate) is filled into a dispersion liquid. According to the invention, spontaneous dissolution of an O-SiO2 template in an alkaline environment and the assisting corrosion effect of the shell are utilized to compound the titanium dioxide hollow nanosphere structure at one step. The preparation method is simple in process, easy to operate and excellent in repeatability; the titanium dioxide hollow nanosphere is uniform in size; the hollow structure effectively increases the specific area, facilitates photocatalysis and improves the photocatalysis activity; the titanium dioxide hollow nanosphere has the visible light responsive property and is high in visible light utilization efficiency.

The invention relates to a titanium oxide / tungsten oxide nano-composite film on the surface of metallic titanium, preparation and an application. The metallic titanium is cleaned and etched, then the metallic titanium is impregnated in an oxidation liquid containing peroxotungstic acid sol and hydrogen peroxide and is kept for a period of time at a certain temperature, a titanic acid and peroxotungstic acid containing nano-film formed through crystal in-situ growth and deposition is obtained, and finally, the titanium oxide / tungsten oxide nano-composite film on the surface of the metallic titanium is obtained through calcination; the film mainly comprises a titanium dioxide and tungsten trioxide compound with a nanobelt structure, the nanobelt width is in a range from 10 nm to 150 nm, and the length is in a range from 0.5 mu m to 20 mu m; the mass percentage of titanium oxide is in a range from 1% to 99.5%, and titanium oxide mainly adopts a rutile or anatase crystalline phase; the mass percentage of tungsten oxide is in a range from 0.5%-99%, and tungsten oxide mainly adopts a hexagonal or monoclinic crystal phase. Compared with the prior art, the preparation is simple and easy and is suitable for large-scale industrial production; the prepared titanic oxide film has important application value in the related fields of photoelectrocatalysis, metal corrosion prevention, electrochemical sensing and the like.

The invention discloses a non-phosphorus oil-removing type powder cleaning agent with magnetic graphene oxide and immobilized degrading bacteria. The non-phosphorus oil-removing type powder cleaning agent is prepared from the following raw materials of sodium hydroxide, sodium carbonate, sodium metasilicate pentahydrate, a silicic acid and organic carboxylic acid modified polymer, sodium dodecyl benzene sulfonate, carbonyl alcohol ethoxylate, sodium gluconate, dodecyl phosphate ester, polyoxyethylene ether, disodium ethylate ethanedioic acid, graphene oxide, nanometer titanium dioxide, carbon dimethylamine hydrochloride, N-hydroxysuccinimide, nanometer iron oxide, moderate absolute ethyl alcohol, moderate sodium hydroxide, moderate 0.9% sodium chloride and moderate deionized water. The powder cleaning agent has the advantages of non phosphorus, wide raw material source, low preparation cost, no toxin and no harm to the environment, good cleaning effect for various sectional materials, low energy consumption and man hour saving and improves the efficiency, the generated waste water is easier to dispose, and therefore the powder cleaning agent is worth of being generalized.

The invention belongs to the technical field of high-concentration dye wastewater, and particularly relates to a segmented treatment method of high-concentration high-chromaticity dye wastewater. In the invention, electrochemical oxidation technology is optimally combined with photocatalytic oxidation technology to become a new electrochemical pre-oxidation-photoelectric collaborative oxidation-photocatalytic oxidation three-segment sewage treatment process, and an Sb*doped SnO2 / TiO2-NTs / Ti photoelectronic integrated electrode with excellent photoelectric catalytic properties concurrently is selected as anode material for degradation treatment. The process achieves prospective high-efficient treatment effect, saves energy consumption to the maximum extent, embodies the advantage of savingenergy, and provides a brand-new method for the degradation of the high-concentration high-chromaticity dye wastewater, thus having broad application prospect and development potential.