18results about How to "Rich pore structure" patented technology

This invention provides a coal-based hard carbon anode material, its preparation method, and its applications. The preparation method includes the following steps: introducing industrial waste gas into raw coal, sequentially performing pre-carbonization and pore-forming, followed by high-temperature carbonization to obtain the coal-based hard carbon anode material. The preparation method provided by this invention uses extremely low-cost industrial waste gas to perform pore-forming treatment on the raw coal material, greatly reducing the preparation cost, and the resulting coal-based hard carbon anode material has high capacity and excellent performance.

This invention provides a solid acid catalyst comprising a divinylbiphenyl polymer as a backbone and a sulfonate group as an active center; wherein the divinylbiphenyl polymer comprises substituted or unsubstituted divinylbiphenyl monomer structural units and optionally substituted or unsubstituted divinylbenzene monomer structural units; in both the substituted or unsubstituted divinylbiphenyl monomer structural units and the substituted or unsubstituted divinylbenzene monomer structural units, the substituents are each independently C1-C5 alkyl groups. This invention selects suitable polymeric monomers and polymerizes them to obtain a polymer backbone with a stable backbone structure and a large specific surface area; after sulfonation, the backbone structure is maintained, and the resulting catalyst has a stable acid active center.

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

This invention discloses a lithium-ion battery separator with a porous alumina-based composite material coating and its preparation method. The lithium-ion battery separator with the porous alumina-based composite material coating includes a base film and a coating on the base film. The coating includes modified porous alumina, which comprises porous alumina and lithium element supported on the porous alumina. The method for preparing the modified porous alumina includes: immersing the porous alumina in an aqueous solution of lithium salt, simultaneously stirring and sonicating under vacuum for 4-6 hours, drying, grinding into powder, and calcining at 400-600℃ for 2-4 hours under an inert gas atmosphere to obtain the modified porous alumina. The lithium-ion battery separator of this invention has high heat resistance, high wettability, and high ionic conductivity.

The application belongs to the field of nanomaterials and electrocatalysis, and specifically designs a single-atom electrocatalyst, which is formed by carbonizing a precursor mixed with nitrogen-containing organic matter and transition metal salt in a way parallel to single-atom generation. The nitrogen-doped carbon nanosheet prepared from the metal salt has the characteristics of rich pore structure, large specific surface area and high graphitization degree, and can capture single-atom metal to form a single-atom catalyst. In the preparation process, the transition metal salt acts as a template, a metal source and a pore-forming agent, and has a catalytic effect on the formed carbon material, thereby improving the graphitization degree of the carbon material. The single-atom catalyst prepared by the application has a high specific surface area and a developed pore size structure, which improves the exposure rate of active sites, and the carbon with a high graphitization degree not only improves the conductivity but also improves the corrosion resistance of the catalyst in an alkaline environment, thereby improving the stability of the catalyst.

This invention relates to the agricultural field, specifically to a method for preparing and applying a carbon dioxide fusion element trap. It addresses the problem that polymeric film-forming agents added to foliar fertilizers easily form a continuous, dense, and impermeable physical film on the leaf surface, making it difficult for carbon dioxide to enter, interfering with normal photosynthesis and transpiration, and thus causing abnormal leaf metabolism. The method involves immersing mesoporous silica microspheres in a PEI solution to obtain PEI-loaded microspheres, then adding a solution of gelatin, chitosan, glycerol, and glutaraldehyde to deionized water to form a composite gel base solution. Finally, selenomethionine, seaweed oligopeptides, and yeast extract are mixed with the composite gel base solution in warm water to obtain the carbon dioxide fusion element trap. This invention, through careful material selection and structural design, cleverly achieves a balance between strong adhesion and high permeability, allowing it to firmly adhere to the leaf surface and eliminating the defect of clogging leaf stomata.

This invention discloses a method for preparing a Ni-electrode strontium titanate toroidal varistor, specifically including: 1) dry pressing strontium titanate powder into a strontium titanate toroidal varistor green ceramic sheet; 2) removing the binder from the green ceramic sheet and pre-firing it; 3) sintering the removed-bind green ceramic sheet in a reducing atmosphere of a mixed gas of equal volumes of nitrogen and hydrogen to form a ceramic substrate; 4) subjecting the ceramic substrate to an oxidation heat treatment to form an oxide film on the surface; 5) screen printing a first layer of nickel paste onto the ceramic sheet, drying it, then screen printing a second layer of silver paste, drying it, and then firing it in an air atmosphere. In this invention, Ni paste is used instead of ohmic silver paste, and sintering is performed in air, which significantly reduces the cost compared to ohmic silver paste, resulting in lower subsequent production costs; at the same time, the nickel paste can form a strong bond with the ceramic substrate, thus giving the nickel paste better adhesion to the ceramic substrate, good stability, and less tendency to delamination.

This invention discloses a carbon aerogel nanosuspension with emulsifying function, its preparation method, and its application. The preparation method of the carbon aerogel nanosuspension includes: adding an alkaline solution to an aqueous solution of a phenolic organic compound and stirring and mixing, then adding an aldehyde solution to carry out an addition reaction to obtain a benzene-based multi-component mixture; then stirring and mixing with an acid solution to carry out a condensation reaction, and then aging the resulting reaction product to obtain a wet gel; the wet gel is freeze-dried and carbonized to obtain a block carbon aerogel; finally, the block carbon aerogel is pulverized into nanoparticles and ultrasonically dispersed in water to obtain the carbon aerogel nanosuspension. The carbon aerogel nanosuspension prepared by this invention has good emulsifying function, can effectively reduce the viscosity of waste tire pyrolysis oil, and capture fly ash in waste tire pyrolysis oil.

This invention discloses a waste polyethylene terephthalate (PET)-based MOF (Metal-O-Factory) functional material, its preparation method, and its applications, belonging to the field of plastic chemical recycling technology. The method includes the following steps: heating a FeCl3 / NaCl / KCl molten salt system to its lowest eutectic temperature, adding PET to react, dissolving the reaction product in deionized water, ultrasonically treating, centrifuging, and drying to obtain the waste PET-based MOF functional material. This strategy uses waste PET and inexpensive iron salts as precursors, not only opening up a new direction for the high-value utilization of waste plastics but also providing a renewable technological approach for the low-cost, large-scale, and sustainable production of MOF materials.

The present application relates to the technical field of photocatalytic treatment of antibiotics in wastewater, and particularly relates to a composite photocatalytic material, a preparation method and application thereof. Melamine, palygorskite and water are mixed to obtain a mixed solution; the mixed solution is mixed with melamine foam, and after the melamine foam absorbs the mixed solution, drying is performed to obtain a precursor; the precursor is calcined to obtain the composite photocatalytic material. The composite photocatalytic material prepared by the present application can effectively improve the performance of the material in adsorbing antibiotics in water, enhance the photocatalytic degradation activity, and is easy to recycle, thus having a broad development prospect.

This invention discloses a method for the synergistic treatment of hexavalent chromium and sulfadiazine complex wastewater. The method utilizes a bimetallic node coupled with a metal-organic framework derivative electrode for the synergistic treatment of hexavalent chromium and sulfadiazine complex wastewater. The electrode includes a conductive substrate coupled with ZrO2 and ZnO. In this invention, the bimetallic node coupled with a metal-organic framework derivative electrode is used as the working electrode. The resulting photoelectrocatalytic system has advantages such as strong light utilization, fast electron transfer efficiency, and strong conversion effect between complex free radical chemistry and different active substances. It can not only achieve the synergistic degradation of hexavalent chromium and sulfadiazine in wastewater, but also simultaneously and efficiently remove both hexavalent chromium and sulfadiazine from the wastewater. It has advantages such as good recyclability, high removal efficiency, good cycle performance, and strong practical application, making it a widely applicable photoelectrocatalytic method with high practical value and application prospects.

This invention belongs to the field of electrocatalyst technology, and specifically relates to a graphene-based sheet-like porous catalyst, its preparation method, and its application. The preparation method includes: separately preparing an aqueous dispersion of graphene oxide and an aqueous dispersion of nano-melamine-formaldehyde resin, mixing them, and stirring to obtain a mixed dispersion; mixing the mixed dispersion with a hydroxyl-containing compound, adjusting the pH to weakly alkaline, stirring, concentrating, and drying to obtain a dried product; and subjecting the dried product to high-temperature pyrolysis. This method can prepare a sheet-like nitrogen-doped carbon-based non-noble metal electrocatalyst with stable mechanical properties, abundant pore structure, and high nitrogen content. It exhibits excellent electrochemical catalytic performance, has a simple preparation method, mild reaction conditions, and can achieve uniform nitrogen doping.

This invention belongs to the field of sodium-ion battery anode material preparation technology, specifically relating to a method for preparing and applying an inorganic salt-assisted hard carbon anode material. This invention uses inexpensive biomass powder as raw material, mixing the biomass powder with inorganic salts in a solid phase, and then performing a two-step heat treatment in a tube furnace under an inert atmosphere to finally obtain the sodium-ion battery hard carbon anode material. The preparation method of the hard carbon anode material provided by this invention is low-cost, simple, and suitable for large-scale production. The obtained hard carbon anode material exhibits good electrochemical performance, excellent cycle stability, and high specific capacity when used in sodium-ion batteries.

The application discloses a carbon-based composite material and a preparation method and application thereof. The carbon-based composite material is prepared by using biochar as a matrix, and loading manganese oxide and magnesium oxide on the surface of the biochar. The preparation method comprises the following steps: uniformly stirring and mixing dry and crushed biomass, a low-valence manganese salt solution and a permanganate solution according to a ratio of 200-500 g:1.5-2.5 mol:1-1.5 mol, washing, filtering and freeze-drying to obtain biomass loaded with manganese; and mixing and grinding the biomass loaded with manganese and inorganic magnesium salt according to a mass ratio of 1:1-1.6, and then pyrolyzing at high temperature to obtain a carbon-based composite material loaded with manganese and magnesium. The raw material is easy to obtain, and the preparation process is simple. The material has a large specific surface area and rich pore structure, can provide rich adhesion reaction sites for microorganisms and sludge, has strong oxidation performance of generating hydroxyl radicals on the surface through advanced oxidation, can improve the degradation efficiency of nitrogen and phosphorus in water in cooperation with microorganisms and / or oxidants, has good removal effect, is highly reusable, green and environment-friendly, and has high application value.

This invention discloses a Pd / WO x -C electrode and its preparation method and application, step one, WO x -C support synthesis steps: WCl6 and C6H 12 O6 is dispersed and dissolved in C6H 14 In O4, a mixed solution is formed; the mixed solution undergoes a hydrothermal reaction to obtain WO4. x -C composite carrier; Step 2, WO x Preparation steps of -C supported palladium: The WO3 obtained in step one is used to prepare palladium. x The -C composite carrier was dispersed in water to obtain solution A; Na₂PdCl₄ was dispersed and dissolved in water to obtain solution B; solution B was added dropwise to solution A while continuously stirring; then the resulting mixed solution was placed in a water bath, heated to a certain temperature and kept at that temperature; after the reaction, Pd / WO₄ was obtained. x -C catalyst; Step 3, Pd / WO x -C electrode preparation steps: The Pd / WO3 obtained in step two... x -C catalyst was dispersed in a mixture, ultrasonicated, coated onto carbon paper, and dried to obtain Pd / WO4. x Electrode. Preparation of WO3 via hydrothermal method. x A C-C composite carrier was developed, and the Pd loading strategy was optimized to achieve high dechlorination efficiency while reducing the amount of precious metals used.

The present application relates to a kind of tellurium / carbon nitride p-n heterojunction photocatalyst and its preparation method and application, preparation method includes the following steps: S1, tellurium compound and carbon-nitrogen compound are dispersed in deionized water, after ultrasonic mixing sufficiently, precursor homogeneous solution is obtained;S2, precursor homogeneous solution obtained in step S1 is carried out hydrothermal reaction, cooling, centrifugal, washing, drying after obtaining supramolecular intermediate;S3, supramolecular intermediate obtained in step S2 is calcined with gas, and after grinding, tellurium / carbon nitride p-n heterojunction composite photocatalyst powder is obtained.Compared with prior art, the tellurium / carbon nitride p-n heterojunction photocatalyst prepared in the present application realizes the accelerated migration of tellurium conduction band photo-generated electrons to carbon nitride conduction band, and the accelerated migration of carbon nitride valence band photo-generated holes to tellurium valence band, inhibits the recombination of carrier, improves charge separation and migration efficiency, so as to enhance photocatalytic activity.

The application provides a preparation method of a zinc ion battery positive electrode material. The method uses self-made porous Mn-MOF as a sacrifice template to introduce a vanadium source, and in a protective atmosphere, in-situ constructs a MnO-MnV2O4-V2O3 ternary heterostructure through high-temperature carbonization treatment. The prepared Mn-MOF has porous nanometer characteristics, a large specific surface area and rich pore structures, can realize efficient loading and uniform dispersion of the vanadium source, and further forms a ternary composite material with synergistic action of double active sites. In the continuous charge and discharge cycle process, the double active sites can significantly increase the number of electrochemical active sites, and the ternary hetero-interface can strengthen the interface orbital hybridization effect, effectively improve the electronic conductivity of the material, and thus significantly improve the discharge specific capacity and cycle stability of the zinc ion battery.