42results about How to "High prospects for commercial application" patented technology

The invention relates to a visible light response catalyst and a preparation method thereof. The chemical composition general formula of the catalyst is xDyVO4 / g-C3N4, wherein x is the mass fraction of dysprosium vanadate in the catalyst, the mass fraction of g-C3N4 is 1-x, and x is at least 0.1 and is at most 0.4. The preparation method of the catalyst comprises the following steps of preparing the dysprosium vanadate and graphite phase carbon nitride with a precipitation method and a direct roasting method; then according to the DyVO4 / g-C3N4 mass ratio, mixing the dysprosium vanadate with the graphite phase carbon nitride to be ground for 10 minutes; and finally roasting for 2 hours at the temperature of 300-600 DEG C to obtain a catalyst finished product. The preparation method of the catalyst is simple and low in cost, and the visible light degradation performance to organic dyestuffs is good.

The invention discloses Ag / AgCl / TiO 2 Composite photocatalytic material and its preparation method and application. The substrate material of the catalyst is titanium dioxide, and particles AgCl and Ag are loaded on the surface of the substrate material. First, the titanium dioxide precursor is synthesized by solvothermal method, and then the anatase phase titanium dioxide is obtained by high-temperature calcination. Finally, titanium dioxide is used as the carrier, silver nitrate is used as the silver source and 1-octyl-3-methylimidazolium chloride salt or hydrochloric acid solution It is a chlorine source, and the AgCl loading method can be divided into two types: hydrothermal co-precipitation and immersion precipitation, and then the product Ag / AgCl / TiO is obtained through light reduction treatment. 2 . The preparation method is simple and easy to operate, and the synthesized Ag / AgCl / TiO 2 The microspheres have strong photocatalytic activity and have excellent performance in the photocatalytic degradation of ethylene and benzene and other volatile organic pollutants.

The invention discloses a method for preparing a positive electrode of a carbon-based flexible lithium-sulfur battery, which belongs to the technical field of preparation of lithium-sulfur battery materials for electrochemical energy storage. First, carbon fibers are annealed in an oxidizing atmosphere to prepare a three-dimensional conductive carbon network. The three-dimensional conductive carbon fiber network is used as a current collector, and then the three-dimensional conductive carbon fiber network is immersed in sulfur carbon disulfide. Ultrasonic or mechanical vibration under vacuum makes the sulfur solution infiltrate the carbon fiber hole structure. and evaporated to dryness, and further use high-temperature gas phase diffusion to diffuse sulfur into the finer gaps of carbon fibers to form a carbon-based flexible lithium-sulfur battery positive electrode in which sulfur is evenly distributed in the three-dimensional conductive carbon fiber network. The self-supporting electrode-assembled flexible battery can maintain high and stable charge-discharge capacity under different folding angles. The preparation method of the self-supporting flexible electrode in the present invention is simple to operate, easy to produce on a large scale, can be widely used in energy storage and flexible wearable devices, and has very good practical value.

The invention relates to a photocatalyst for degrading organic dye waste water pollutants. The catalyst is formed by compounding magnesium ferrite and silver vanadate nanoparticles. The chemical composition general formula of the photocatalyst is mMgFe2O4 / Ag3VO4, wherein m is the mass ratio of MgFe2O4 to Ag3VO4; and m is more than 0 and less than or equal to 0.005. A preparation method of the photocatalyst comprises the following steps of: firstly, preparing magnesium ferrite and silver vanadate powder with a citric acid sol-gel method and a chemical precipitation method respectively; secondly, mixing and grinding the magnesium ferrite and silver vanadate powder for 10 minutes according to the mass ratio of the magnesium ferrite to the silver vanadate; and lastly, baking at the temperature of 200-500 DEG C, and baking for 4 hours to obtain a finished catalyst. The catalyst has a simple preparation method, has high visible light degrading performance on organic pollutants in dye waste water, and contributes to recycling simultaneously.

The invention provides a Co3O4 nanobelt array electrode. The electrode is used as an anode for carrying out a chlorination reaction. The Co3O4 nanobelt is deposited by adopting a hydrothermal method on a titanium mesh (or a titanium sheet, a cooper sheet, a copper net, a carbon net, carbon cloth, carbon fibers, graphene, FTO glass and the like) substrate; and after annealing is carried out, namelythe Co3O4 nanobelt is obtained; and firstly, a precursor is formed, and the Co3O4 nanobelt array is formed by heat treatment. The Co3O4 nanobelt array electrode is simple to prepare, the cost is low,the activity is high, the stability is high, and the application prospect is considerable; and the step is simple, operation is convenient, and practicability is high.

The invention discloses a preparation method of an Ag4(GeO4) photocatalyst with a visible light response. The preparation method comprises the following steps: (1) in a stirring state, slowly dropping a sodium germinate solution into a silver nitrate solution, and continuously stirring, thus forming a precursor solution; (2) transferring the precursor solution into a reaction kettle, performing reaction under a condition of 110 to 130 DEG C for 10 to 14 hours, after the reaction is completed, and performing suction filtering and drying, thus obtaining the Ag4(GeO4) photocatalyst. The Ag4(GeO4) photocatalyst prepared through the preparation method disclosed by the invention has the visible light response; the prepared photocatalyst is relatively high in photocatalysis activity and is suitable for degrading organic pollutants and decomposing water to generate oxygen during actual application in the field of photocatalysis. An experimental research shows that an Ag4(GeO4) photocatalytic material is relatively high in photocatalysis performance and is used for photocatalytically decomposing water to generate oxygen; the prepared photocatalyst can decompose water to generate oxygen by 200 mumol / g under irradiation of visible light for 1 hour and can degrade 98 percent of a methylene blue organic dye within 20 minutes.

The invention discloses application of transition metal sulfide Mn-Cd-S-loaded solid solution in a photocatalysis hydrogen production aspect. A prepared XS / Mn0.5Cd0.5S(X=Mo, Cu, Pd) photocatalytic material has excellent photocatalysis hydrogen production activity; in addition, the hydrogen yield can respectively reach 3,940, 6,940 and 12, 280 [mu]mol / g / h with a small loading capacity, the higher hydrogen yield can be achieved under visible light irradiation, and the photocatalysis hydrogen production efficiency is respectively 6.5 times, 11.5 times and 20.3 times of a Mn0.5Cd0.5S monomer.

The invention relates to a visible-light response calcium-bismuth composite oxide catalyst and a preparation method thereof. The visible-light response calcium-bismuth composite oxide catalyst is calcium-bismuth composite oxide, and the chemical composition formula is CaBixOdelta, wherein x is more than or equal to 6.5 and less than or equal to 9, and delta is more than or equal to 10.75 and lessthan or equal to 14.5. The preparation method of the catalyst comprises the following steps of: weighing bismuth nitrate and calcium nitrate, preparing into solution, mixing, then adding edetic acid solution under the condition of stirring, using 35% aqueous solution of ammonia to adjust the pH value of the solution to be 8, stirring and ageing for 5 hours, filtering precipitates, cleaning and drying; and roasting for 12 hours at the temperature of 500-700 DEG C under the air atmosphere, cooling and obtaining the catalyst. The invention has the advantages that the preparation method of the catalyst is simple, the cost is low, and the visible-light response for organic pollutants is higher.

The invention belongs to the field of inorganic nano-catalytic materials, and in particular relates to an electrocatalytic total water splitting CoZn-LDHs-ZIF@C composite structure material and its preparation method and application. The CoZn-LDHs-ZIF@C composite structural material prepared by the present invention has a multi-level structure morphology, wherein CoZn-LDHs is a lamellar structure, and the ZIF composite is a granular particle with a relatively uniform size. The specific surface area of ​​the composite material after low-temperature heat treatment 1125.1‑193.0 m 2 / g. Samples prepared by the present invention CoZn-LDHs-ZIF@C-200, CoZn-LDHs-ZIF@C-250, CoZn-LDHs-ZIF@C-300, CoZn-LDHs-ZIF@C-350, CoZn-LDHs-ZIF @C‑400 exhibits excellent electrocatalytic hydrogen evolution and oxygen evolution performance in alkaline electrolyte, as well as full water splitting performance; it has the advantages of simple method, mild reaction conditions, convenient operation and low energy consumption.

The invention discloses a Ti<3+>:TiO2 / TiF3 composite semiconductor photocatalyst. According to the photocatalyst, the diameter of titanium dioxide is 10-20nm, the diameter of titanium fluoride is 100-150nm, a type II heterojunction is formed by titanium dioxide and titanium trifluoride, and the photocatalyst has low carrier recombination efficiency, contains lots of trivalent titanium, has high visible light absorption capacity and can be used for degrading organic pollutants. The invention also discloses a method for preparing the composite semiconductor photocatalyst. Elemental zinc serves as a reducing agent, titanium tetrachloride and titanium tetrafluoride serve as raw materials, and Ti<3+>:TiO2 / TiF3 with different ratios of titanium dioxide to titanium trifluoride can be prepared by changing the amount of elemental zinc in different reactions by utilizing alcohol-thermal method synthesis. The preparation method has the advantages of simplicity in operation, low cost and mild synthesis conditions and has high commercial application prospects.

The invention discloses a photocatalytic material Cu2-xS / Mn0.5Cd0.5S / MoS2 as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) preparing asubstrate Mn0.5Cd0.5S solid solution; 2) ultrasonically dispersing the Mn0.5Cd0.5S solid solution prepared by step 1) into water and adding soluble copper salt, Na2S and Na2SO3 into the Mn0.5Cd0.5S solid solution; stirring and reacting to obtain in-situ loaded Cu2-xS / Mn0.5Cd0.5S; 3) adding (NH4)2MoS4 into a reacted solution in step 2) and directionally loading MoS2 by adopting a visible light photo-reduction loading method to generate the Cu2-xS / Mn0.5Cd0.5S / MoS2. A synthesis method for preparing the photocatalytic material Cu2-xS / Mn0.5Cd0.5S / MoS2 disclosed by the invention has simple conditions, no pollution and good stability and has a relatively high commercial application prospect.