39results about How to "Regular channel structure" patented technology

The invention belongs to the technical field of functional composite materials, and provides a graphene ribbon modified polymer-based foam material and a preparation method and application thereof in order to solve the problems that a carbon tube and carbon nanofiber as hydrophobic materials are difficultly adsorbed onto the surface of polymeric foam and the adsorption capacity is high. The water contact angle of the graphene ribbon modified polymer-based foam material is more than or equal to 130 degrees, and the foam material is made of 85-99% by weight of foam and 1-15% by weight of grapheme ribbons. The prepared modified foam has the advantages of good hydrophobicity, high oil absorption rate, good compression-resilience mechanical performance, reuse and the like, the preparation method is simple, quick and easy to operate, and the raw materials are cheap and easy to obtain. The application prospects are great on sewage treatment, oil water separation and other aspects.

The invention discloses a preparation method of a nitrogen-doped ordered mesoporous carbon material. The preparation method comprises the following steps: performing polymerization reaction on 2,4,6-trichloro-1,3,5-triazine and a polyamine compound in an organic solvent, adding an acid-binding agent to neutralize acid generated during polymerization reaction, so as to promote the polymerization reaction; filtering and drying to obtain a carbon-nitrogen material precursor, and performing high-temperature carbonization under inert atmosphere; cooling to room temperature, removing a template agent by utilizing hydrofluoric acid, to obtain the nitrogen-doped ordered mesoporous carbon material. The polymerization process of the precursor is simple and easily controlled and safe, the nitrogen-doped ordered mesoporous carbon material is good in the integration with a template, the porous structure is controllable, the cost is low, and the equipment is simple and convenient in requirement. The method is high in repeatability, and high in reaction yield; the product is good in uniformity, high in nitrogen content, and regular in structure; the whole process is simple and convenient. The prepared nitrogen-doped ordered mesoporous carbon material has porous ducts with ordered heights, large in specific surface area, the apertures are uniformly distributed, and the nitrogen-doped ordered mesoporous carbon material is high in stability, and has wide application prospects in the field of catalytic and electrode materials, and the like.

The invention relates to a preparation method of a catalytically cracked gasoline hydrodesulfurization catalyst containing a nanocrystalline multi-stage duct ZSM-5 molecular sieve. The catalytically cracked gasoline hydrodesulfurization catalyst mainly consists of the following components in percentage by weight: 5-30% of active components, 4-9% of an active component auxiliary, 1-5% of a modifying agent and 60-90% of carriers, wherein the active components comprise at least one of Mo and W metal elements; the active component auxiliary comprise at least one of Co and Ni elements; the modifying agent is one of metals La and Ce, or the compounding of the metal La and Ce; the carriers are composite carriers using aluminum oxide and an NCMZ molecular sieve as main bodies. According to the invention, through the unique framework and duct structure of the NCMZ molecular sieve, the advantages of a micropore ZSM-5 molecular sieve and the advantages of mesoporous materials are combined, so that the reaction efficiency is further improved, and increasing product quality is finally realized. The FCC gasoline hydrodesulfurization catalyst disclosed by the invention can enable a reaction to be carried out under more moderate conditions.

The invention relates to a method for electrochemical synthesis of Cu3 (BTC) 2 and belongs to the field of preparation technologies of catalytic material and nanometer material. The method comprises the following steps: preparing a mixed solution of 1-butyl-3 methylimidazole bromide, trimesic acid, methyl alcohol and ethyl alcohol, adopting a copper electrode as an anode and a platinum electrode as a cathode, and adjusting the impressed voltage through a mixed solution of EDTA and DETA for electrolysis to obtain the Cu3 (BTC) 2 material. According to the invention, the adopted raw materials are cheap and easy to obtain, the operation is simple and easy, the preparation method is simple and easy to control, the equipment requirements are low, the environmental friendliness is achieved, and the Cu3 (BTC) 2 material is of a regular octahedron structure and has a diameter of 10-20 nm and a specific area of 950 m<2>g<-1>; the test conditions of the reaction are as follows: 500 ppm of NO, 500 ppm of NH3, 5% of O2, N2 as balance gas, the total flow of exhaust gas being 100ml/min, and the denitration catalytic efficiency reaching 100% at 230-280 DEG C.

The invention discloses a method for preparing a lithium-sulfur battery diaphragm material from a fluorine-containing covalent organic framework material, and belongs to the technical field of energy materials. A novel COF material (COF-F) rich in fluorine atoms serves as a modified diaphragm material of a lithium-sulfur battery, diaphragm modification has the shuttle effect influence on the lithium-sulfur battery and the anchoring effect on polysulfide, and the novel COF material is successfully prepared in a gradual heating mode and has high crystallinity. And when being used as a modified diaphragm material of the lithium-sulfur battery, the modified diaphragm material can reinforce anchoring of polysulfide and aims at improving the electrochemical performance of the lithium-sulfur battery. And compared with the same COF structure without fluorine, the characteristics of the material are highlighted. The material has triazinyl and fluorine functional groups, so that the chemical bond action on polysulfide can be enhanced, and the cycle performance of the lithium-sulfur battery can be remarkably improved.

The invention discloses a silicon dioxide-modified heavy metal waste water adsorbent, and a preparation method thereof. The silicon dioxide-modified heavy metal waste water adsorbent is composed of, by weight, 19 to 32 parts of silicon dioxide, 13 to 26 parts of tetraethyl orthosilicate, 13 to 28 parts of 3-aminopropyltriethoxysilane, 12 to 25 parts of salicylaldehyde, 8 to 17 parts of dichloromethane, 8 to 19 parts of absolute ethyl alcohol, 9 to 17 parts of sodium bicarbonate, 7 to 19 parts of copper nitrate, 13 to 22 parts of maleic anhydride, and 12 to 25 parts of glutaraldehyde. The silicon dioxide-modified heavy metal waste water adsorbent possesses following advantages: 1, the silicon dioxide-modified heavy metal waste water adsorbent contains mesoporous silica with chelating effect and a highly ordered structure, the specific surface area is large, the channel structure is uniform, the aperture is large and adjustable, and adsorption capacity is large; 2, the silicon dioxide-modified heavy metal waste water adsorbent possesses high selectivity on heavy meal ion adsorption, and is capable of improving the effectiveness of adsorption on heavy metal at low concentration pollution.

The invention provides a preparation method of a magnetic molecular sieve catalyst of which a skeleton is doped with transition metal. According to the catalyst, transition element metal is used as amain catalyst, magnetic iron species are used as a magnetic source, a mesoporous molecular sieve material is used as a carrier, and the catalyst is synthesized by a hydrothermal one-pot method. The prepared catalyst has a neat porous structure of the mesoporous molecular sieve material, and large adsorption active sites are provided; high reaction activity and stability are achieved owing to the transition metal doped in the skeleton; and the wrapped magnetic iron species have good reusablility. The catalyst has the characteristics of high crystallinity, large specific surface area, good dispersibility, high stability, good reusability and the like. The effect of removing organic matters such as Orange II is excellent, and the economic benefit and social benefit are good.

The invention discloses a three-dimensional ordered macroporous graphene carbon material embedded with MoSx nanosheets, and preparation and application thereof, and belongs to the field of functional nano composite materials. The target material provided by the invention is mainly prepared by a template-hydrothermal combined method: (1) a first step: fully dipping a polymethyl methacrylate microsphere template in a nickel nitrate precursor solution, carrying out suction filtration, drying, roasting in an inert atmosphere, and cooling to room temperature to obtain three-dimensional ordered macroporous graphene carbon as a matrix; and (2) a second step: immersing the obtained three-dimensional carbon matrix into an ammonium molybdate precursor solution, and then carrying out hydrothermal treatment at 200 DEG C to obtain the MoSx nanosheet embedded three-dimensional ordered macroporous carbon material after the reaction is finished. The composite material has the advantages of being high in specific surface area, good in conductivity, uniform in MoSx nanosheet dispersion, free of agglomeration, stable in structure and the like, and shows excellent reversible specific capacity and good cycling stability when being used for a negative electrode of a lithium ion battery.

The invention relates to a preparation method of a sludge conditioner, which belongs to the technical field of sewage treatment. The sulfonated lignin grafted sodium acrylate copolymer is used as a raw material, a magnesium oxide modified zeolite molecular sieve is used as a carrier, and the sulfonated lignin grafted sodium acrylate copolymer is fixed on the carrier to prepare the sludge conditioner. The sulfonated lignin grafted sodium acrylate copolymer has the intermolecular force and reactivity of a polysaccharide compound; the mechanical and biological action stability and the linear chain expansion capability of synthetic macromolecules are also realized; sulfonated lignin contains a large number of -SO3H groups and has strong anionic property and strong hydrophilicity, a sodium acrylate copolymer is used as a graft comonomer, the spatial configuration of lignin is changed, the relative molecular mass is increased, functional groups with flocculation performance are introduced, and the flocculation performance of lignin is further improved.

The invention discloses a preparation method of a porous carbon material with high thermal-oxidative stability and a regular pore structure. Aiming at the defects of poor thermal-oxidative stability and disordered pore structures of traditional porous carbon materials, the hetero-element-doped porous carbon material with excellent thermal-oxidative stability and the regular pore structure is prepared by a high-temperature calcination method, so that the application range of the traditional carbon-based materials in a high-temperature environment can be further expanded.

The invention belongs to the technical field of porous materials and specifically relates to an asymmetric composite film based on ordered mesoporous carbon, a super-assembly preparation method and application thereof. The preparation method comprises the following steps of: preparing a mesoporous carbon precursor solution from a template agent and resol; using an anodic aluminum oxide film with blocked holes as a substrate; then spin-coating the prepared mesoporous carbon precursor solution on the anodic aluminum film with the blocked holes to coat a mesoporous carbon film on the anodic aluminum oxide film to obtain a composite film with a two-layer structure, and growing the mesoporous carbon film on the surface of an AAO substrate by using an interface super-assembly method through evaporation induced self-assembly (EISA), thermal polymerization and calcination in an inert atmosphere to obtain the asymmetric composite film based on ordered mesoporous carbon. The composite film has aregular channel structure, provides rich channels for ion transport, has good cation selectivity and permeability, and can capture osmotic energy and convert the osmotic energy into electric energy.The method is simple, raw materials are easily available, and the method is suitable for large-scale production.

The invention discloses a preparation method of sphere-like porous silicon dioxide powder, and belongs to the field of porous materials. The method comprises the following steps: (1) mixing raw materials (the ratio of water to ethanol to a template agent to sodium hydroxide to a silicon source is (14.5-17.4): (3.5-4.2): (1.2-1.5): (0.005-0.012): 1; (2) carrying out aging or reflux treatment for 12-360 hours at the temperature of 75-95 DEG C, crystallizing for 0-360 hours at the temperature of 75-85 DEG C, filtering, and washing with deionized water; and (3) transferring into a muffle furnace for roasting, heating to 400-550 DEG C at a heating rate of 0.1-3 DEG C/min, and preserving heat for 3-6 hours to obtain a target powder material. The preparation method has the characteristics of cheap and easily available raw materials, simple preparation process, no use of a high-temperature and high-pressure device, easy control of preparation conditions, less emission in the preparation process and the like, and the obtained porous adsorption material has better adsorption performance.

The invention relates to a denitration catalyst and a preparation method thereof and a flue gas denitration method. The preparation method of the denitration catalyst comprises the following steps: (1) preparing a UiO-66-NH2 solution by taking UiO-66-NH2 powder as a raw material; and (2) adding a vanadium-containing precursor solution into the UiO-66-NH2 solution to ensure that the molar ratio of vanadium in the vanadium-containing precursor to UiO-66-NH2 is (1-10):1, reacting for 12-48 hours under the water bath condition of 60-100 DEG C, and separating and drying the reacted solution to obtain the UiO-66-NH2-V catalyst. According to the UiO-66-NH2-V catalyst prepared by the preparation method disclosed by the invention, UiO-66-NH2 is used as a metal organic framework material, and the structure of the UiO-66-NH2-V catalyst is stable; vanadium sites in the catalyst are uniformly distributed, so that the catalytic activity of the catalyst is improved; and the UiO-66-NH2-V catalyst prepared by the method disclosed by the invention can be used for flue gas denitration, and still has relatively high catalytic activity at a low temperature.

The invention provides a preparation method and application of a heterogeneous catalyst for olefin oxidation carboxylation, and relates to the technical field of heterogeneous catalysts for olefin oxidation carboxylation. According to the prepared catalyst, a mesoporous silica molecular sieve is used as a carrier, amino-functionalized imidazole ionic liquid is used as an active component, and the ionic liquid is quantitatively and uniformly loaded on the carrier mesoporous silica through mechanical ball milling under a solvent-free condition. The ionic liquid immobilized heterogeneous catalyst provided by the invention has the advantages of regular mesoporous structure, stable physical and chemical properties, good catalytic activity on olefin oxidation carboxylation reaction (the yield of cyclic carbonate synthesized by olefin oxidation and CO2 cascade reaction can reach 85%), recyclability and the like, and is suitable for catalyzing the reaction of CO2 and olefin to prepare cyclic carbonate by a one-step method.

The invention provides saRNA for activating PTPRO gene expression. The saRNA comprises a sequence which is complementary with a region from -3000 site to -200 site of a PTPRO gene promoter region. The saRNA disclosed by the invention can activate the PTPRO gene expression, through improving the expression or the activity of PTPRO genes namely drug sensitive genes, the drug sensitivity is improved, and the growth of tumor cells is restrained, so that the purpose of killing the tumor cells is realized, and tumors are treated. The invention further provides a transport carrier loaded with the saRNA. Functional modification is performed on the surface of the transport carrier through a modifier, and the transport carrier which can recognize the tumor cells and has good biocompatibility is constructed, so that the saRNA can safely and efficiently penetrate through cell membranes and/or cell nucleuses of the tumor cells.