124results about How to "Synthesis conditions are easy to control" patented technology

The invention discloses a honeycomb-ceramic-type monolithic catalyst, and preparation method and application thereof. The monolithic catalyst takes honeycomb ceramic as a carrier, a Beta molecular sieve is coated on the surface of the honeycomb ceramic and taken as a coating layer, and then active component, namely precious metal, is loaded on the surface of Beta molecular sieve; the active component of the precious metal is one or two selected from palladium or platinum; in the honeycomb-ceramic-type monolithic catalyst, the mass ratio of the coating layer of the Beta molecular sieve to the honeycomb ceramic is 0.02-0.2:1, the mass ratio of the precious metal to the coating layer of the Beta molecular sieve is 0.02-0.2:1, the honeycomb ceramic is cordierite honeycomb ceramic; and in the invention, the high-silicon or full-silicon Beta molecular sieve is taken as the coating layer of the monolithic catalyst, and has the characteristics of good water resistance, high heat stability andthe like, and the monolithic burning catalyst taking the Beta molecular sieve as the coating layer can keep better activity and stability under high temperature, and suitable for being taken as catalytic combustion catalyst for application.

The invention discloses an acrylic-acid high-capacity primary-amino chelate resin for trapping copper ions and a preparation method thereof, belonging to the field of polyamine resin wastewater treatment. The structural unit of the primary-amino chelate resin disclosed by the invention is disclosed in the specification, wherein x represents a repetitive structure unit of different aminolysis reagents. The preparation method disclosed by the invention has the advantages of wide material sources, low cost, simple operation steps and controllable synthesis conditions; and the synthesized resin has superhigh adsorption capacity for copper ions.

The invention supplies a method to compound MWW molecular sieve. It adopts two-stage hydrothermal crystallization method that the room temperature at -119.9 degree centigrade is the first stage and 120-180 degree centigrade is the second stage. The alkali resource is one or two or three of hydroxide of Na, K and Ba. The silicon resource could be solid silica gel or liquid silica gel. And template agent could be HMI or the mixture of HMI and organic amine, quaternary ammonium salt, alcohols, and polyether. The invention has the advantages of compound method and condition is easy to control and low cost. The acid of the product could be altered by changing alkali resources.

The invention provides a lithium-sulfur battery self-supporting cathode material and an electro-spinning preparation method thereof. Polyacrylonitrile and polymethyl methacrylate serve as precursors of electrostatic spinning yarns, composite nano-fiber membranes are prepared by an electro-spinning method, pre-oxidation and carbonization heat treatment of the electrostatic spinning fiber membranesare implemented to form a self-supporting in-situ nitrogen doped porous carbon nano-fiber structure, self-supporting in-situ nitrogen doped porous carbon nano-fiber membranes are soaked in carbon disulfide solution of sulfur, drying and heat treatment in the argon atmosphere are implemented to obtain the self-supporting lithium-sulfur cathode material. According to the material, the polymethyl methacrylate serves as a template agent, self-supporting in-situ nitrogen doped carbon nano-fibers with porous structures are formed in a heat treatment and pyrolysis manner, the loading capacity of thesulfur is improved, dissolution of polysulfide is restrained, and the nano-fibers can directly serve as electrode materials.

The present invention belongs to the field of inorganic advanced material technology, in the concrete, it relates to a kind of nano crystal large-diameter mesopore oxide material and its preparation method. Said mesopore oxide material is synthesized by using inorganic precursor and organic template agent molecules through a self-assembly process including organic solvent evaporation and induction treatment in the acidic environment, its space group structure is two-dimensional hexagonal structure, three-dimensional hexagonal structure and three-dimensional cubic structure, its pore diameter range is 1-18nm, BET specific surface area is 50-800 sq.m/g and its thermal stability is higher than 400 deg.C.

The invention relates to a high-performance silicon molecular sieve membrane. It uses porous silicon dioxide ceramics as carrier, and its surface has MFI crystal structure. The average pore diameter of said silicon dioxide ceramics carrier is 0.1-2 microns, and its average porosity is 10-60%. Its preparation method uses porous silicon dioxide ceramics as carrier, uses TPABr as template agent and adopts in-situ hydration process to synthesize the invented silicon molecular sieve membrane.

The invention discloses a supported bimetallic reforming catalyst and a preparation method and an application thereof. The catalyst is characterized in that active components metallic nickel and metallic cobalt are supported on an oxide carrier, wherein the mass ratio of the oxide carrier to metallic nickel to metallic cobalt is 1: 0.01-0.1: 0.01-0.1; and the oxide carrier is one of magnesium oxide, alumina, silica, cerium oxide and zirconia. The preparation method is characterized in that a deposition-precipitation method is employed, a precipitating agent is slowly added in a solution of the oxide carrier, metallic nickel and metallic cobalt, a reaction is carried out, and steps of pumping filtration, washing, drying and calcining are carried out to obtain the catalyst. The catalyst solves the problems of poor anti-carbon formation capability, complex preparation method and high catalyst cost in the prior art. The whole preparation has the advantages of simple process, convenient operation, and easy control of the synthesis condition, and the prepared catalyst has high catalytic activity and anti-carbon formation performance.

The invention discloses hydrogel applicable to cell adhesion and a preparation method of the hydrogel. The hydrogel is formed by Ac-IIISLGK-NH2 and L-Glutamine (L-Gln) under the action of an enzymatic reaction, wherein the N-terminal of the Ac-IIISLGK-NH2 is acetylated, the C-terminal of the Ac-IIISLGK-NH2 is aminated, the mole ratio of the Ac-IIISLGK-NH2 to the L-Gln is 1:1, reaction temperature is 37-40 DEG C, and reaction time is 24-48 hours. The hydrogel has the advantages that the prepared hydrogel can allow cells to be well adhered to cell surfaces, is low in toxicity and good in biocompatibility, does not cause the non-specific immunity reaction of lymphocyte, is ideal nano tissue engineering material and is significant to human life health.

The invention discloses a novel non-metal catalyst used for preparing vinyl chloride by an acetylene method, a preparation method and an application thereof. The catalyst is a SiC-based composite material, by controlling the growth condition and post-treatment condition, a thin C layer with different morphology and chemical composition is grown on SiC, acetylene and hydrogen chloride are directly catalyzed to react for generating vinyl chloride, and high activity, stability and vinyl chloride selectivity of the catalyst can be presented. The C-SiC catalyst has the advantages that the nonmetal catalysis of vinyl chloride by the acetylene method can be realized, high pollution problem of a mercuric chloride catalyst on industry can be solved, usage of precious metal even a metal catalyst can be avoided, and the C-SiC catalyst has high environment benefit and economic value.

The invention discloses a magnetic ordered mesopore composite material, as well as a preparation and application thereof. The preparation method of the material comprises the following steps: modifying the surfaces of cobalt ferrite nano particles with a cationic surfactant, namely hexadecyl trimethyl ammonium bromide (CTAB), uniformly mixing the product with a segmented copolymer, namely EO130PO70EO130 (F108) and CTAB in an alcohol water system, and adding tetraethyl orthosilicate. The composite material is of a spherical microstructure with uniform size under the observation of a transmission electron microscope, and the magnetic nano particles are coated with the inside of MCM-48 silicon dioxide balls; the magnetic ordered mesopore composite material which is synthesized by the method has excellent magnetic property, maintains large specific surface area and pore volume, and can be applied to the field of adsorption, separation, catalysis, information storage, biological medicine, and the like.

The invention relates to the technical field of environment and chemical engineering, in particular to a carboxyl modified graphene oxide-metal organic framework composite material and a preparation method and application thereof. According to the composite material, chloroacetic acid modified graphene oxide GO-COOH-X and a metal organic framework UIO-66-NH2 are compounded, X represents the mass percentage of GO-COOH in the composite material, and X is equal to 9%, 17%, 23%, 33%, 44% and 50%. The metal organic framework is used as a matrix, and carboxyl modified graphene oxide is used as an adsorption functional group to synthesize the adsorbent. The adsorbent has the advantages of simple preparation method, strong regeneration capability, good stability, very high adsorption capacity on Nd (III), wide application range and practical applicability, and the maximum adsorption capacity can reach 146mg. g <-1 >.

The invention discloses a copper iodine-based inorganic-organic hybrid semiconductor material and a preparation method and an application thereof. The structural formula of the hybrid semiconductor molecule is (Mebtz)2Cu3I5, wherein Mebtz is a methylated benzothiazole cation with a positive charge, and the Cu3I5 anion in the material is a one-dimensional anion chain formed by alternately connecting binuclear (Cu2I6) units and planar triangles (CuI3). By selecting cuprous iodide, benzothiazole, potassium iodide, methanol, acetonitrile and hydroiodic acid as reaction raw materials, a single crystal of the compound (Mebtz)2Cu3I5 is obtained under a solvothermal condition, which is used in the fields of photoelectric detection and solar cell materials.

The invention relates to a composite copper-based molecular sieve catalyst which is characterized in that a hygrometric-state catalyst comprises the following components in parts by mass: 17-22 parts of a metal Cu main active component, 1.5-3.7 parts of a metal Cu active component assistant, 18-29 parts of deionized water, 12-15 parts of an active component guiding agent, 33-45 parts of a molecular sieve carrier and 0.9-1.9 parts of a dispersing agent. The catalyst is high in active component load rate, so that the reaction activity of SCR is obviously improved, the relatively high practical application value is realized, the catalysts preparation flow is simplified, synthesis conditions are easy to control and the industrialized application is easily realized.

The invention provides a synthesis method of rare earth doped hexagonal-phase cerium sodium fluoride nanocrystalline. The synthesis method comprises the following steps of: using oleic acid and octadecene as solvents, mixing the cerium chloride and rare-earth chloride under the atmosphere of nitrogen, maintaining the temperature at 120-160 DEG C, stirring for a certain peroid of time, cooling the mixture to the room temperature, adding a methanol solution containing sodium hydroxide and ammonium fluoride to the cooled mixture, stirring for a certain peroid of time, heating the stirred mixture under the atmosphere of nitrogen so as to remove methanol, heating to 250-320 DEG C under the atmosphere of nitrogen to react for a certain peroid of time, cooling to room temperature, carrying out centrifugal separation to obtain a reactant, and washing and drying the reactant to obtain the rare earth doped hexagonal-phase cerium sodium fluoride nanocrystalline. The rare earth doped hexagonal-phase cerium sodium fluoride nanocrystalline prepared by using the synthesis method is better in uniform dispersity and excellent in down-conversion and up-conversion luminescence properties.

The invention discloses a preparation method of a cuprous oxide nano material and hydrogen evolution performance of the cuprous oxide nano material, and belongs to the technical field of nanometer materials. According to the preparation method, ethylene glycol and diethylene glycol are used as reducing agents, copper hydroxide and basic copper carbonate with specific morphology are used as coppersources, and the copper hydroxide and the basic copper carbonate copper are reduced to form cuprous oxide nano material with maintained morphology under the protection of inert gas through a gas phasereduction method. The reaction steps are simple and are environmentally friendly, the obtained product does not need to be washed, and a pure cuprous oxide product can be obtained. According to the preparation method provided by the invention, the simple and rapid method is adopted for synthesizing the cuprous oxide nano material with the maintained morphology, and the prepared cuprous oxide nanomaterial has the performance of electro-catalytic hydrogen evolution.

The invention relates to a preparation method for a monodisperse functionalized polymer microsphere with the surface chain transfer activity. An RAFT (Reversible Addition-Fragmentation Chain-Transfer) distillation-precipitation polymerization method is adopted, and polyene monomers or polyene and monoene mixed monomers are used, as a result, the monodisperse polymer microsphere of which the crosslinking degree is greater than 30 percent, particle diameter is within a range of 50 nanometers-8 micrometers, particle dispersion index is 1.038-1.164, surface chain transfer functional group content is 0.75-1.88 mmol/g, and surface can be further modified, is prepared. The preparation method has the characteristics that a particle diameter and surface functional group content are controllable; surface functional groups are stable; chain transfer activity is high; metal impurities difficult to treat are not introduced; synthesis conditions are easy to be controlled; the price of the raw material is low, and the like. The prepared monodisperse surface functionalized polymer microsphere can be applied to a chromatogram stationary phase, medicine slow release, catalysts, active bio-molecule carries and the like.

The invention discloses composite elemental phosphorus with favorable crystallinity and a preparation method and application thereof. The composite elemental phosphorus comprises red phosphorus and black phosphorus and is a brownish black block-shaped particle. The preparation method comprises the steps of 1) performing solvothermal reaction on amorphous red phosphorus and a nitrogen-containing compound in a closed condition; and 2) performing post-treatment on a system solution to obtain the composite elemental phosphorus. The invention further provides the application of the composite elemental phosphorus with favorable crystallinity in a lithium ion battery. The composite elemental phosphorus has excellent crystallinity, specific capacity, structural stability and cycle performance; and moreover, the preparation method has the advantages of simple process, available raw material, low cost, good repeatability and controllable synthesis condition.