36results about How to "Meet the requirements of environmental friendliness" patented technology

The invention discloses a composite graphite phase carbon nitride heterojunction photocatalyst preparation method, relates to a catalyst preparation method, and provides a preparation method of a novel silver ion doped zinc thioindate composite graphite phase carbon nitride (Ag:ZnIn2S4/g-C3N4) heterojunction photocatalyst for enhancing the photocatalytic activity of visible light, wherein silver nitrate, zinc acetate, indium acetate, thioacetamide and graphite-phase carbon nitride are subjected to a reaction according to a ratio under a hydrothermal condition to obtain the target photocatalyst. According to the invention, the novel visible light photocatalyst is clear in structure and definite in composition; by doping with Ag<+>, the photon utilization rate of ZnIn2S4 can be obviously enhanced; after compounding with g-C3N4, the diffusion range of photon-generated carriers can be enlarged, and the recombination of photon-generated electron-hole pairs is inhibited, so that the catalytic activity of visible light is enhanced; the Ag:ZnIn2S4/g-C3N4 composite material has wide prospect in the field of clean energy production and energy conversion based on high visible light activity and good hydrogen production capacity; and the obtained catalyst has broad application prospect.

The invention belongs to the technical field of a composite electrode material. The NiCo2O4/MoS2 composite electrode material is synthesized by a two-step hydrothermal method and can be used for researching performance of a two-electrode system. The NiCo2O4/MoS2 composite electrode material is synthesized by the moderate two-step hydrothermal method, foamed nickel is used as a substrate, a synthesis material is directly grown on the foamed nickel, an adhesive is prevented from being used, the material impedance is reduced, and meanwhile, the material conductivity is improved to a great extent by the foamed nickel substrate; and generally, the conductivity of a transition metal oxide (NiCo2O4) is lower than that of a sulfide (MoS2), the cycle stability of the NiCo2O4 is also relatively low, while the theoretical capacity of NiCo2O4 is relatively high. Therefore, by combining the NiCo2O4 and the MoS2 to form the composite electrode material, the conductivity and the cycle stability of the material can be effectively improved, and high specific capacitance of the material is simultaneously maintained.

The invention belongs to the technical field of inorganic nanomaterials, and particularly relates to a method for controllably synthesizing niobium pentoxide microspheres and microflowers without template solvent heat. The method comprises the following steps: firstly, mixing a certain amount of niobium inorganic matter ionic salt with a precipitant according to a certain ratio, and respectively dissolving into two different organic solvents; then performing ultrasonic treatment for 15-30 minutes, completely dissolving solid powder and evenly mixing; and finally, respectively transferring thetwo solutions into a reaction kettle with a polytetrafluoroethylene substrate, sealing, putting into a drying oven, controlling the temperature of the drying oven to be 180-200 DEG C, reacting for 8-12 hours, and after the reaction is over, cooling the product to be at room temperature; centrifugally separating the precipitated product, collecting solids, rinsing for multiple times with deionizedwater and absolute ethyl alcohol, and performing vacuum drying, to obtain the niobium pentoxide microspheres and microflowers.

The invention relates to an environment-friendly coal transportation antifreezing agent which is prepared from the following components in parts by weight: 6-19 parts of potassium acetate, 8-16 partsof sodium formate, 9-15 parts of urea, 2-6 parts of ethylene glycol, 0.5-1.0 part of glycerin, 1-2 parts of sodium benzoate, 0.05-0.1 part of benzotriazole and 41-73 parts of water. The antifreezing agent can reduce the freezing point of coal to be lower than 30 DEG C below zero, is free of any chlorine salt components, fully meets the environment-friendly demand and is not sprayed to equipment and corrodes a train as well.

The invention discloses a preparation method of visible light-responsive Fe3O4 quantum dot-modified BiOCl/BiVO4 and belongs to the technical field of preparation of semiconductor materials. The preparation method comprises the following steps: 1) preparation of a BiOCl/BiVO4 photo-catalyst with a one-step hydrothermal method; 2) preparation of the visible light-responsive Fe3O4 quantum dot-modified BiOCl/BiVO4: mixing FeCl3.6H2O and the BiOCl/BiVO4 photo-catalyst prepared in the step 1), adding into deionized water, stirring to form a solution A; meanwhile, dispersing FeCl2.4H2O of the same molar mass in deionized water, stirring to form a solution B, and dropwise adding the solution B in the solution A; continuously adding concentrated ammonia water in the solution A while stirring for areaction; collecting through a magnet, washing and then drying to obtain the visible light-responsive Fe3O4 quantum dot-modified BiOCl/BiVO4. The preparation method disclosed by the invention has thebenefits that a Fe3O4QDs-BiOCl/BiVO4p-n heterojunction is prepared by utilizing the simple and quick method, the heterojunction shows excellent photo-catalytic activity when used for degrading a variety of antibiotics under visible light, and a sample has relatively strong magnetism and is easy to recover and reuse; meanwhile, the preparation method reduces the energy consumption and the reactioncost, is convenient for mass production, non-toxic and harmless, and environmentally-friendly.

The invention belongs to the technical field of nanometer materials, and concretely relates to a preparation method of a zinc stannate nanocube or a nanosheet material. The invention adopts a higher-temperature hydrothermal synthesis method so as to directly obtain a metal oxide material with the nanocube or a nanosheet structure. The preparation method comprises the steps of adopting sodium dodecyl benzene sulfonate as an external acidifying source, adopting tetraethylammonium hydroxide as an external alkalifying source, adjusting different hydrothermal times to adjust the size of the cube, adjusting the dosage of the sodium dodecyl benzene sulfonate to optimize the shape of the material, and finally obtaining the metallic oxide hierarchical-structure nanometer material with a regular shape and a stable structure. The method provided by the invention is mild and controllable in experiment conditions, high in practicability, and good in reproducibility.

The invention discloses a brown colorant for water Teflon high-temperature cloth and a method for preparing the brown colorant. The brown colorant is composed of a high-temperature resisting pigment, polytetrafluoroethylene, a functional additive agent, a dispersing wetting agent and deionized water. The materials comprise, by weight percent, 35 to 50 percent of the high-temperature resisting pigment, 10 to 20 percent of the polytetrafluoroethylene, 5 to 10 percent of the functional additive agent, 2 to 20 percent of the dispersing wetting agent, and the balance of deionized water. The brown colorant can be prepared through mixing and grinding all the constituents and implementing quality test, vacuum defoamation and filtering packing. The brown colorant for the water Teflon (PTFE) high-temperature cloth by the method is characterized by long storage stability, good temperature resistance (reaching to more than 400 DEG C), excellent chemical resistance, bright color, good compatibility with PTFE emulsion and high color intensity. The grain diameters can realize that D99 is less than or equal to 5 microns (namely, the average diameter of 99 percent of the grains is less than or equal to 5 microns), and the brown colorant and the method conform to national environmental requirements because the deionized water is taken as base material. The brown colorant has the advantages of simple preparation process, low preparation cost and easy industrialized production.

The invention belongs to the technical field of nano material synthesis and relates to an Ag-Pi/BiVO4 heterojunction synthesis method. The preparation method comprises the following steps: firstly, growing a layer of BiOI nanoparticles on an FTO substrate by adopting an electro-deposition method; dropwise adding a mixed solution of vanadyl acetylacetonate and dimethyl sulfoxide on the surface of the FTO; carrying out high-temperature calcination to generate bismuth vanadate (BiVO4), carrying out a continuous ion adsorption reaction, sequentially soaking FTO in AgNO3, deionized water, Na2HPO4 and deionized water, and finally washing the FTO with deionized water to obtain the Ag-Pi/BiVO4 heterojunction. The heterojunction is used as a photoelectrode to be applied to photoelectrochemical hydrolysis reaction, wherein a cocatalyst, silver phosphate (Ag-Pi), is loaded on the wormlike nanostructure of bismuth vanadate (BiVO4), so that the photoresponse range, the charge injection efficiency and the charge separation efficiency of the photoelectrode are improved, and the sunlight utilization rate of the photoelectrode is improved. The material has the advantages of good chemical stabilityand good photoelectrochemical performance; the synthesis process is simple, the repeatability is good, the used materials are cheap and easy to obtain, and the environment-friendly requirement is met.