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

The invention relates to a visible light responsive photocatalysis material Ag@Ag3VO4 and a preparation method thereof. The Ag@Ag3VO4 photocatalysis material is of a near-spherical composite structure of depositing silver nano granules on the surfaces of silver vanadate granules, wherein the silver vanadate granules have the diameter of 6.5-7.5 mu m, and the surface deposited nano granules have the particle size of 5-25 nm. The invention also provides a preparation method of Ag@Ag3VO4. According to the invention, silver is deposited and loaded on the surface of Ag3VO4, thus the photocatalysis performance of Ag3VO4 is farther improved; and the method has the advantages of simple method, mild reaction conditions, convenience for operation, low energy consumption and the like.

The invention provides a composite sodium ion battery positive electrode material and a preparation method thereof. The material has a shell-core structure; the interior of the material is of a layered structure; and the surface of the material is of a tunnel-shaped structure. By adopting a simple secondary sintering method, raw materials are dispersed on the surface of a layered material througha wet mixing or dry mixing method; a layer of the stable tunnel-shaped structure is generated on the surface of the layered material in situ; and the sodium ion composite positive electrode material with the layered and tunnel-shaped core-shell structure is obtained. The composite sodium ion battery positive electrode material has the advantages of high capacity of the layered material and high stability of the tunnel-shaped structure, and can be stably stored in air, and the cycling stability and the high-power performance are both superior to those of the single layered material or tunnel-shaped structure material. Moreover, the preparation method is simple and low in cost, is capable of effectively reducing the production and storage costs of the layered material, and has relatively high commercial application prospects.

The invention relates to a photocatalyst for degrading organic pollutants and a preparation method thereof. The photocatalyst is vanadium-yttrium composite oxide, a general formula of chemical composition is VxY1O(2.5x+1.5), and x is vanadium-yttrium mol ratio, and is more than or equal to 0.3 and is less than or equal to 3.5. The preparation method for the photocatalyst comprises the following steps that: a yttrium nitrate solution and an ammonium metavanadate solution are mixed to generate a precipitate under the condition of stirring according to the vanadium-yttrium mol ratio; and the precipitate is aged through the stirring and then is evaporated to remove moisture, an obtained solid is dried and finally is baked at a temperature of between 400 and 600 DEG C, and a finished photocatalyst product is obtained after the cooling. The invention also relates to a catalyst for precious metal Pt supported by V1.5Y1O5.25 composite oxide and a preparation method thereof. The photocatalyst has the advantages of simple preparation method and low cost, good visible light degradation property to the organic pollutants, and higher commercial application prospect.

The invention relates to a preparation method of a carbon-based flexible lithium-sulfur battery cathode, belonging to the technical field of preparation of lithium-sulfur battery materials for electrochemical energy storage. The method comprises the following steps of: preparing a three-dimensional conductive carbon network by annealing carbon fibers in an oxidizing atmosphere, taking the three-dimensional conductive carbon fiber network as a current collector, immersing the three-dimensional conductive carbon fiber network into carbon disulfide of sulfur, soaking a carbon fiber hole structurewith a sulfur solution by ultrasonic waves or mechanical oscillation under vacuum, performing evaporating to dryness, and further diffusing the sulfur into finer gaps of the carbon fibers by high-temperature gas phase diffusion to form a carbon-based flexible lithium-sulfur battery cathode with the sulfur uniformly distributed in the three-dimensional conductive carbon fiber network. The flexiblebattery assembled by the self-supporting electrodes can keep high and stable charge and discharge capacity under different folding angles. The preparation method of the self-supporting flexible electrode is simple to operate and easy for large-scale production, is capable of being widely applied to energy storage and flexible wearable equipment, and is good in practical value.

The invention discloses a preparation method of halogen bismuth oxide nitrogen fixation photocatalysts with a three-dimensional structure. The preparation method comprises following steps: 1, a glucose aqueous solution is prepared; 2, hydro-thermal reaction, washing, centrifugation, and drying are carried out; 3, an obtained product is added into an acetic acid aqueous solution, and magnetic stirring is carried out; 4, Bi(NO3)3 5H2O is added, after complete dissolving, a halogeno salt of the same molar amount is added so as to obtain a brown precipitate; and 5, drying and sintering are carriedout so as to obtain the halogen bismuth oxide nitrogen fixation photocatalyst with a three-dimensional structure. According to the preparation method, template method is adopted to prepare a plurality of nitrogen fixation photocatalysts, preparation technology is simple, energy consumption is low, different halogeno salts can be adopted to prepare samples of a three-dimensional structure respectively, product purity is high, the morphology is uniform, the dispersibility is excellent, the performance is stable, and the circulation performance is excellent.

The invention discloses a preparation method of a Fe2O3 thin film electrode and application of the Fe2O3 thin film electrode to a photoelectric chemical glucose sensor. The preparation method comprises the steps that ferric nitrate is dissolved in ethanol to obtain an iron source liquid precursor; the surface of a conductive substrate is rotatably coated with the iron source liquid precursor to obtain a thin film precursor; and in the rotatably coating process, the number of layers of rotatably coating is at least one layer, the layers are firstly heated to 145-155 DEG C after each layer of rotatably coating, and then are heated to 345-355 DEG C to treat, and the thin film precursor is sintered to obtain the Fe2O3 thin film electrode. The Fe2O3 thin film electrode prepared by the preparation method is directly assembled into the photoelectric chemical sensor for detecting glucose, and has the advantages of good selectivity and quick response. In addition, the preparation method is simple and has no pollution, the preparation process of the glucose photoelectric chemical sensor is simple, and a high commercial application prospect is achieved.

The invention discloses a vanadium phosphate nano material with a porous network structure and a preparation method thereof, and the vanadium phosphate nano material is used for a lithium ion batterycathode material. The preparation method comprises the following steps: firstly, growing self-supporting graphene foam by a chemical vapor deposition method, and loading a vanadium phosphate (VPO4) nano material on a graphene foam substrate by a hydrothermal method to improve the conductivity and ionic conductivity of the graphene foam substrate. The vanadium phosphate nano material with the porous network structure can be used as negative electrode materials of lithium ion batteries and has good lithium ion energy storage behavior, and the charging capacity can reach 424.4 mAh g<-1> at a current density of 0.2A g<-1>; after 3,000 cycles of charging and discharging, the capacity maintenance rate still reaches above 50.3%. The preparation method of the vanadium phosphate nano material is simple, avoids the tedious process of preparing electrode sheets by the traditional process, greatly reduces the cost problem of battery assembly, and can realize green mass production.

The invention discloses a preparation method and application of double noble metal loaded nano titanium dioxide, a substrate material of a catalyst is nano TiO2, and double noble metal particles Au-Pt, Ag-Pt and Ag-Au are loaded on the surface of the substrate material. The preparation method comprises the following steps: firstly, synthesizing nano TiO2 as a carrier by using a thermal decomposition method, and then obtaining products Au-Pt/TiO2, Ag-Pt/TiO2 and Ag-Au/TiO2 in a photo-reduction loading manner. The preparation method is simple and easy to operate, and the synthesized A-B/TiO2 (A, B = Au, Ag and Pt) nanoparticles have high photocatalytic activity and stability and have excellent performance in the aspect of photocatalytic degradation of formaldehyde.