34results about How to "Increased reactive sites" patented technology

The invention relates to a preparation method of a composite material, and concretely relates to a preparation method of an MoS2/ZnIn2S4 nanosheet composite material by using sheet MoS2. The low photocatalytic activity of a single ZnIn2S4 photocatalyst at present is a problem that remains to be solved in the invention. The method comprises the following steps: 1, mixing sheet MoS2 with anhydrous ethanol; 2, adding to a mixed solution comprising an indium salt, a sulfur source, a zinc salt, a polyol and anhydrous ethanol; and 3, reacting, washing, and drying. The method realizes the controllable preparation of the MoS2/ZnIn2S4 nanosheet composite material; and the prepared MoS2/ZnIn2S4 nanosheet composite material has a very good stability. The method is used for preparing the MoS2/ZnIn2S4 nanosheet composite material.

The invention discloses a catalyst for decomposing nitrous oxide and a preparation method of the catalyst. The catalyst is prepared by the deposition precipitation method. The method comprises the processes of preparing a deposit, washing, forming a deposit, activating through the catalyst, etc.; the catalyst comprises active ingredients, a carrier which is zirconium oxide, and additives, wherein the active ingredients include one or more than two of Co, Ni, Fe and Mn; the additives include one or more of cerium oxide, lanthanum oxide and barium oxide. A catalyst activity experiment shows that nitrous oxide can be completely catalytically decomposed into nitrogen and oxygen at the temperature ranging from 450 to 700 DEG C; therefore, the activation temperature is low, and the T50 (reaction temperature under conversion rate of 50%) is about 350 DEG C. The catalyst is high in activity and outstanding in heat resistance, has a wide operation window, and enables the concentration of nitrous oxide in industrial waste gas to be greatly reduced, and therefore, the environmental pollution is decreased; the catalyst is particularly suitable for N2O removal of a nitric plant and an adipic acid plant.

The invention provides a solid oxide fuel cell. The anode layer, cathode layer and electrolyte layer of the cell contain cerium-based materials; the cerium-based materials of the anode layer and the cathode layer are cerium-based materials with a flower-shaped structure; and the anode layer and the cathode layer also carry catalysts and/or conductive additives. The invention also provides a preparation method of the cell. The solid oxide fuel cell has improved performance and service life and improves the acoustic performance of electrodes, thereby improving the overall reaction activity of the electrodes. The cell can use medium-low temperature solid oxide fuels of a plurality of fuels including hydrocarbons.

The invention provides phenolic resin with a structure shown as the formula I, wherein m ranges from 1 to 10; n ranges from 1 to 10; k ranges from 1 to 5; Q serves as a resorcinol repeating unit; and an intermediate resorcinol repeating unit and a phenol repeating unit of a molecular chain of the phenolic resin are in the weight ratio of (0.1-0.7):1. The phenolic resin provided by the invention can be solidified at low temperature. The invention also provides an oil field proppant prepared by using the phenolic resin and a preparation method of the oil field proppant shown as the formula I.

The invention discloses a titanium nitride-cladded nickel titanate composite material as well as a preparation method and application thereof. The composite material is a core-shell structural material TiN@NiTiO3 with titanium nitride uniformly cladded on the surfaces of spheral nickel titanate nano particles. The titanium nitride-cladded nickel titanate composite material can be applied as a negative electrode material with high charge-discharge specific capacity, favorable rate capability, long cycle performance and the like for a lithium ion battery and a sodium-ion battery, and the preparation method is simple, is low in cost, and has extensive industrial application prospect.

The invention discloses a tin selenide and tin oxide composite material and a preparation method and application thereof. The method comprises the following steps that a selenium-containing alkaline solution and a tin-containing acid solution are mixed according to the selenium-tin molar ratio of 1:1, heating is conducted to reach the temperature of 70-100 DEG C, stirring is conducted, reacting is conducted, precipitates obtained through reacting are washed, filtered, dried and calcined at 300-400 DEG C, and the tin selenide and tin oxide composite material is obtained. The tin selenide and tin oxide composite material serving as a sodium (lithium) ion battery cathode material has an excellent electrochemical property, the preparation method of the material is simple, the cost is low, and the material has a wide industrial application prospect.

The invention discloses a tin diselenide/polyethyleneimine composite material and a preparation method and application thereof. The preparation method comprises: dissolving selenium powder in a sodium borohydride solution with inert gas saturated to obtain a selenium-powder-containing solution, mixing the selenium-powder-containing solution with a tin sources aqueous solution according to a required ratio of selenium to tin for preparation of tin diselenide to obtain a mixed solution, adding polyethyleneimine into the mixed solution, performing full stirring, and carrying out a hydrothermal reaction; and filtering, washing and drying the obtained product to obtain the tin diselenide/polyethyleneimine composite material. In the obtained composite material, polyethyleneimine uniformly coats tin diselenide hexagonal nanosheets. The composite material can be taken as an anode material for a sodium-ion battery and has excellent electrochemical performance. The composite material is simple in preparation method and low in cost and has bright industrialized application prospects.

The invention belongs to the organic battery technology in the field of electrochemical energy storage, and relates to a method for modifying a graphite felt electrode by manganese dioxide which can achieve the large-scale production, in particular to a method for modifying the graphite felt electrode for an organic flow battery. The method comprises the following steps: firstly, processing graphite felt through supersonic-acid mixing, so that the surface area of graphite fibers is increased and the reaction sites of a graphite electrode are increased, and the surface of the graphite fiber isnot obviously broken; growing manganese dioxide on the surfaces of the graphite fibers, so that the electrochemical reaction catalytic activity of the graphite fibers is enhanced, and the battery capacity and the energy efficiency are improved. The method is simple and easy to operate, can realize large-scale production, is low in application cost, and provides an electrode material treatment approach with greatly improved performance for preparation of the organic flow battery.

The invention discloses a preparation method of a high-strength high-barrier TPU composite material, and belongs to the technical field of polymer composite material synthesis. According to the method, carrying out a reaction between polytetramethylene ether glycol and 4, 4 '-methylenediphenyl diisocyanate to obtain an isocyanate-terminated TPU prepolymer, adding modified graphene oxide into the TPU prepolymer, and taking the modified graphene oxide and 1, 4-butanediol as a compound chain extender to participate in an in-situ polymerization process, so as to complete a chain extension reaction, thereby obtaining the high-strength and high-barrier TPU composite material. The modified graphene oxide enables reaction sites of a reaction system to be increased; the crosslinking degree of the composite material is improved, and a large number of covalent bonds and hydrogen bonds exist in the prepared TPU composite material, so that the dispersity of the modified graphene oxide in a TPU matrix is good, the interface bonding force with the TPU matrix is enhanced, and the barrier property and the mechanical property of the TPU composite material are improved.

The invention relates to a bio-based nanometer material and a preparation method thereof. The preparation method of the bio-based nanometer material comprises the following steps that an organism rawmaterial, including green plants, shells of shellfish, organs of molluscs and/or cell walls of fungi, is dispersed in an aqueous solution prepared from a peroxydisulfate activating system and an advanced oxidation technology system for hydrolysis reaction after being crushed to obtain hydrolysate; the hydrolysate is subjected to post-treatment to obtain the bio-based nanometer material; the peroxydisulfate activating system is prepared from a peroxydisulfate-containing agent and a peroxydisulfate activating agent; the advanced oxidation technology system is prepared from hydrogen peroxide andan agent for making the hydrogen peroxide generate hydroxyl radicals. The preparation method of the bio-based nanometer material is high in preparation efficiency, high in reaction speed and low in preparation cost. The invention further provides the bio-based nanometer material prepared through the method.

The invention relates to a porous silicon/carbon composite negative electrode material in-situ synthesized by taking porous polymer microspheres as a template, a preparation method and a lithium ion battery. The preparation process comprises the following steps of: adding porous polymer microspheres into water, heating and stirring to obtain a suspension solution; adding a silicon source into the suspension solution to obtain a mixed solution; filtering the mixed solution, washing the mixed solution with deionized water and drying the mixed solution in sequence, then adding a reducing agent, and conducting grinding and mixing to obtain an intermediate product A; treating the intermediate product A through a thermal reduction process to obtain an intermediate product B; and carrying out acid pickling on the intermediate product B, washing with deionized water, filtering, and drying to obtain a final product. Compared with the prior art, a carbon layer obtained through in-situ compounding can better improve the electrical conductivity, the cycling stability, the charge-discharge efficiency, the rate capability and other electrochemical properties of a silicon negative electrode, and the unique micro-nano pores reserve a lithium-intercalation expansion space for silicon and reduces the absolute volume change of the composite material in the charge-discharge process.

The invention discloses a solid oxide electrolytic cell oxygen electrode and a preparation method thereof.The oxygen electrode is composed of an oxygen ion-electron mixed conductor framework and a nano-composite catalyst evenly covering the surface of the oxygen ion-electron mixed conductor framework, the particle size of the oxygen ion-electron mixed conductor framework is 200-2000 nm, the porosity of the framework is 40-70%, the particle size of the nano-composite catalyst is 1-100 nm, and the particle size of the nano-composite catalyst is 1-100 nm. The electrode with the structure has abundant oxygen evolution active sites, and shows excellent electrochemical performance and good stability.

The invention belongs to the technical field of adhesives, and particularly relates to a double-component adhesive and application in artificial boards. The double-component adhesive provided by the invention comprises a component 1 and a component 2 which are independently packaged, wherein the component 1 comprises formaldehyde-based resin, the component 2 is degraded tannin modified by a cross-linking agent, the degraded tannin is prepared by degrading tannin through a degrading agent, the cross-linking agent modified degraded tannin is obtained by modifying and degrading tannin with a cross-linking agent, a mass ratio of the tannin to the cross-linking agent is (100-80):(15-40), and a mass ratio of the component 1 to the component 2 is 1:(0.01-0.5). According to the invention, the steric hindrance of tannin is reduced by degrading tannin, and the reaction active sites of tannin are increased; and in the curing process, the degraded tannin modified by the cross-linking agent is polymerized with the formaldehyde-based resin, so that the cohesiveness of the two-component adhesive is improved, the decomposition of the formaldehyde-based resin is reduced, and the two-component adhesive has relatively low formaldehyde release amount.