185results about How to "Economical method of preparation" patented technology

The invention relates to a composite material of a nitrogen-doped porous carbon-wrapped carbon nano tube as well as a preparation method and an application of the composite material. The preparation method comprises the following steps: dispersing the carbon nano tube in water, adding a carbon source to obtain a reaction system, subsequently performing hydrothermal reaction, performing thermal treatment on the carbon nano tube wrapped with a carbon layer on the surface, and a nitrogen source at the high temperature so as to obtain the composite material of the nitrogen-doped porous carbon-wrapped carbon nano tube. According to the preparation method, the carbon source is polymerized under a hydrothermal reaction condition so as to obtain the carbon layer, the outer surface of the carbon nano tube is wrapped with the carbon layer, subsequently the carbon layer is carbonized and decomposed to generate a porous structure under high temperature treatment, and at the same time, the gasified nitrogen source is diffused to the carbon layer through ducts to be subjected to in-situ doping. The composite material provided by the invention can be used as a cathode oxidation reduction catalyst of a fuel battery, is excellent in catalysis, and is high in oxidation activity when being compared with other nitrogen-doped materials reported in documents. The preparation method provided by the invention is simple and economic in process, convenient to operate and easy to achieve the large-scale production.

The invention relates to a preparation method of leather, and provides a preparation method of soft leather dyed by wax, the method is capable of reducing production cost, reducing environmental pollution and reducing energy consumption, and comprises the following steps: 1) preparing blue wet leather; 2) performing machinery wet treatment; 3) tanning and dyeing; 4) drying for arrangement and 5) coating.

The invention belongs to the technical field of synthesis of inorganic porous materials and particularly relates to a preparation method of a house-of-cards-like hierarchical porous ZSM-5 molecular sieve which is low in cost, environment-friendly and fast. The preparation method comprises the following steps: adding an inorganic alkali source and an aluminum source into deionized water, and adding a proper amount of N-methyl-2-pyrrolidone (NMP); then, slowly adding a silicon source; fully and uniformly stirring; and synthesizing a house-of-cards-like hierarchical porous HCL-ZSM-5 molecular sieve by a one-step hydrothermal method. The molecular sieve has remarkable hierarchical porous structural characteristics, is large in external surface area, strong in acidity and good in stability, and has wide application prospects in the fields of catalysis, adsorption, separation and the like. In an alkaline ZSM-5 synthetic system without an organic template, by using non-toxic and cheap NMP as a structural guiding agent which is used for replacing an expensive macromolecular organic template, the method is an economic, efficient and environment-friendly synthetic method which is expected to be applied to large-scale commercial production.

The invention discloses a composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and a method for preparing the composite reaction medium. The composite reaction medium comprises, by weight, 1.0-3.0 parts of zeolite, 0.7-1.3 parts of bentonite, 0.5-1.5 parts of attapulgite and 1.0-6.0 parts of coal cinder. The zeolite, the bentonite, the attapulgite and the coal cinder are sintered to obtain the composite reaction medium. The composite reaction medium and the method have the advantages that the nitrogen and the phosphorus can be synchronously, efficiently and quickly removed by the composite reaction medium, the composite reaction medium can be used as a biological carrier, accordingly, shortcomings of instability of biological phosphorus removal, large quantity of mud due to chemical phosphorus removal and the like can be overcome, and detour flow of water at the fronts of the barriers and the like can be prevented.

The invention discloses a method for preparing a Pd catalyst with three-dimensional nano meshy structure by reduction of a nitrile rubber precursor, which comprises: mixing K3Co(CN)6 and K2PdC14 by ultrasonic according to a molar ratio of 1:2 in a temperature range of 0 to 100 DEG C, standing and obtaining nitrile rubber A, adding reducer in the same amount or an excessive amount into the nitrile rubber A, standing for 0.1 to 24 hours, reacting nitrile rubber with the reducer, obtaining a component B after reducing the Pd metal , washing the component B, and drying the component B to obtain a palladium catalyst. The catalyst prepared by the method has a three-dimensional meshy structure, has high homogeneity and dispensability, and has high electric catalytic activity and stability for formic acid oxidization. The preparation method disclosed by the invention is simple and economic and is suitable for industrial large-scale production.

The invention discloses a high-length-to-diameter-ratio solid-walled hollow gold / gold-silver nanotube and a controllable synthesis manufacturing method of the nanotube. According to the method, a high-length-to-diameter-ratio silver nanowire serves as a template; as Au (I) salt is adopted as a gold source in an optimized mode for replacement reaction, the adjustability of the replacement reaction rate and the precise controllability of experiments can be improved; in this way, the wall thickness of the nanotube and the flatness of the surface of the nanotube can be controlled more accurately, and the situation that a porous wall and a uneven surface are produced, or the nanotube collapses or fractures is avoided. The high-length-to-diameter-ratio solid-walled hollow gold / gold-silver nanotube has better conductivity, oxidation resistance, strength, bending resistance, light transmittance and abrasion resistance.

The invention discloses a porous NiO / CeO2 hybrid nanosheet array, and a preparation method and application thereof. The method comprises the following steps: putting foam nickel cleaned by hydrochloric acid into a mixed solution containing cerium nitrate, ammonium fluoride and urea, and carrying out hydrothermal reaction at different temperatures to obtain a NiO / CeO2 hybrid nanosheet array precursor; and calcining the precursor in air to prepare the porous NiO / CeO2 hybrid nanosheet array, wherein the thickness of the porous NiO / CeO2 hybrid nanosheets is 10-25nm or so, and the diameter of pores in the nanosheets is 5-40nm. The hybrid nanosheet array has favorable electrochemical properties, and can be used as a base material of a biosensor.

The invention provides a phase change energy storage temperature-adjusting internal wall coating and a preparing method thereof. The phase change energy storage temperature-adjusting internal wall coating comprises, by mass, 30%-50% of emulsion, 0.5%-1.5% of dispersing agents, 0.5%-2% of antifreezing agents, 1%-3% of coalescing agents, 1%-2% of thickening agents, 0.5%-1% of defoaming agents, 5%-15% of titanium dioxide, 5%-10% of functional padding, 15%-30% of composite phase change materials and the balance water. According to the phase change energy storage temperature-adjusting internal wall coating and the preparing method, the attapulgite-based paraffin composite phase change materials serve as temperature-control base materials, the obtained phase change coating has good energy storage performance, cheap in price and excellent in weather resistance, energy consumption is saved, the indoor comfort is improved, the phase change coating is not limited by the territory and weather in use due to the adjustable phase change temperature, the application field of the phase change coating is broadened, and the coating has the good economic benefits and environment benefits and wide application prospects.

The invention discloses a poly-allylamine oriented platinum nano cube preparation method. A hydrothermal reduction method is used for reducing K2PtCl4 into cubic platinum nano particles regular in shape and uniform in size by taking PAH (poly-allylamine hydrochloride) as complexing agent, stabilizing agent and morphological guide agent and taking HCHO as reducing agent. The platinum nano particles are in a cubic structure consisting of six {100} crystal faces and have excellent dispersibility and stability in aqueous solution and is high in catalytic activity and stability to electrochemical oxygen reduction reaction (ORR). The preparation method is simple, economical and suitable for industrial massive production.

The invention relates to a method for preparing 1-(1-naphtaline) ethylamine possessing optical activity, which mainly solves problems of current process of expensive original raw material, long synthesizing process, low yield coefficient, and over-high cost and the like; the invention has chiral aspartic acid as chiral resolving agent, water or solution of water and dioxane as solvent; under a heating condition, racemate 1-(1-naphtaline) ethylamine is reacted with chiral aspartic acid to form enantiomeric salt. Then, according to different solubility of 1-(1-naphtaline) ethylamine to enantiomeric salt, splitting is carried out, and two configurations (S configuration and R configuration) of 1-(1-naphtaline) ethylamine are separated and prepared; chiral e.e. value for one time of splittingcan reach over 98 percent, with yield coefficient over 30 percent. The method is mainly used for preparing S configuration 1-(1-naphtaline) ethylamine and R configuration 1-(1-naphtaline) ethylamine drug intermediate possessing optical activity and template compound researched and developed by innovative small molecule drugs.

The invention discloses a preparation method and application of a rhenium disulfide nanoflake. A single-layer and / or few-layer disulfide nanoflake is prepared by mixing a rhenium source with xanthateand carrying out hydrothermal reaction. The method is characterized in that the large-scale commercially-produced xanthate is selected as a sulfur source; the method has good repeatability and low cost, and can be used for preparing the single-layer and / or few-layer disulfide nanoflake. The nanoflake can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectronic devices and the like.

The invention belongs to the technical field of a catalyst, and discloses a nitrogen-doped carbon aerogel catalyst used for a metal-air battery, and a preparation method. The preparation method comprises the following steps of (1) adding pyrrole, polyvinylpyrrolidone and sodium chloride into ethyl alcohol, heating and stirring until the ethyl alcohol is fully volatilized to obtain an intermediate product A; (2) adding a ferric salt solution to the intermediate product A obtained in the step (1), and heating and stirring to obtain a polypyrrole nanosheet; and (3) heating the polypyrrole nanosheet obtained in the step (2) to obtain the nitrogen-doped carbon aerogel catalyst. The preparation method is simple without involving the conventional complicated and time-consuming template pore-forming step; instead, a precursor is carbonized directly to obtain the required porous carbon material; the catalytic performance of the material is maintained to the maximum degree; the obtained nitrogen-doped carbon aerogel catalyst is large in specific surface area, high in catalytic property and high in stability; and in addition, the nitrogen-doped carbon aerogel catalyst, used as the negative electrode material of a zinc air battery, has excellent oxygen reduction catalytic activity, so that the nitrogen-doped carbon aerogel catalyst can be applied to the fields of fuel cells.

The invention relates to a preparation method of an inorganic mesoporous membrane, which comprises the following steps: fully mixing metallic oxide presoma, water, a catalyzer and a pore-forming agent to obtain mixed sol solution; pouring the mixed sol solution, curing and forming to prepare a metallic oxide gel; washing the pore-forming agent in the metallic oxide gel; and drying the washed metallic oxide gel to obtain the inorganic mesoporous membrane based a metallic oxide. In the invention, acid is used as the pore-forming agent, the accurate control to the aperture of the inorganic mesoporous membrane is realized by changing the content of the pore-forming agent, and the prepared metallic oxide mesoporous membrane has a high-through three-dimensional connected through hole structure.The preparation method disclosed by the invention is economic, simple and effective, and can remarkably reduce the preparation difficulty and cost of the inorganic mesoporous membrane, and greatly promotes the wide application of a inorganic mesoporous material in filter, catalyzing, sensors and other fields.

The invention relates to a superfine polyester fluorescent fiber with a high adsorption function and a preparation method thereof, in particular to a superfine polyester fluorescent fiber with the high adsorption function based on sulfonic acid functionalized polystyrene microspheres and a preparation method of the superfine polyester fluorescent fiber with the high adsorption function. The preparation method comprises the steps of blending with polyester by using polyester master batches of mixed and blended sulfonic acid group modified polystyrene microspheres when the polyester fiber is prepared, and carrying out melt spinning to obtain the polyester fiber in the shape of a Chinese character 'mi' (the part in the shape of the Chinese Character 'mi' is polyester nylon, and the rest partis polyester blended with microspheres) which radially penetrates through the cross section. The specific surface area of the fiber is large, and the sulfonic acid functionalized polystyrene fluorescent microspheres are uniformly dispersed in a polyester matrix, so that the fiber is carried with sulfonic acid groups. The difficulty of low loading rate of sodium sulfonate in polyester in the priorart is overcome, the microspheres with high loading rate are mixed and doped into the polyester, the loading rate of the polyester sodium sulfonate is improved, and the superfine fiber has a large specific surface area, so that the obtained polyester fiber has high adsorption energy.

The invention discloses a molybdenum disulfide nanosheet preparation method which comprises the steps: mixing a molybdenum source with xanthic acid and performing hydrothermal reaction to prepare single-layer and / or few-layer molybdenum disulfide nanosheet. According to the method, xanthate which is industrially produced in a large scale is utilized as a sulfur source, so that cost is low, repeatability is good, and the single-layer and / or few-layer molybdenum disulfide nanosheet can be prepared out. The nanosheet can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectric devices and the like.

The invention provides a preparation method of modified paraffin. The modified paraffin is obtained by crosslinking paraffin in a molten state at appropriate temperature by taking organic peroxide as a crosslinking agent; and the obtained modified paraffin has the characteristics of high phase change enthalpy value, good energy storage property, good heat stability, high chemical stability, and the like. The preparation method provided by the invention is economic, simple, convenient, practical and easy to popularize and apply; the paraffin is a byproduct during petroleum extraction and is rich in source; and the preparation method provided by the invention also provides an effective way for the comprehensive utilization of the industrial by-product and has application prospect in multiple technical fields of solar energy storage, energy utilization and transformation, waste coolness and waste heat utilization, and the like.

Provided is a method of manufacturing high-purity, high-quality manganese sulfate which can be immediately used for manufacturing a lithium ion secondary battery from manganese sulfate waste liquid of a wasted battery. Since impurities are removed from the manganese sulfate waste liquid by using sulfides causing no secondary contamination in the manganese sulfate waste liquid and the manganese sulfate is manufactured by performing evaporation concentration through heating, the manufacturing method is very environment-friendly and economical. Since the manganese recovering process improving the manufacturing yield of the manganese sulfate and the waste water treatment process capable of recycling the source materials and discharging waste water are integrated, the manufacturing method is very efficient and environment-friendly. The manufacturing method is applied to the recycling industry, and thus, it is possible to obtain effects of preventing environmental pollution and facilitating recycling the resources.

The invention relates to a method for preparing a nitrogen and sulfur synchronous doped nanometer titanium dioxide photocatalyst. One method adopting a doping source and simultaneously preparing the N and S modified TiO2 photocatalyst has not been reported. The method comprises the following steps of: preparing a titanium source solution and a doping source solution, weighting 80 parts by volume of anhydrous alcohol, adding 20 parts of tetrabutyl titanate into the anhydrous alcohol, and stirring to obtain the titanium source solution; adding 20 parts by volume of anhydrous alcohol, 20 parts of deionized water and 4 parts of 65%-68% nitric acid into a drop funnel to form a mixing solution, adding cystine accounting for 13% of the weight of the mixing solution into the mixing solution, and uniformly shaking to obtain the doping source solution; mixing the titanium source solution with the doping source solution to form wet gel, drying in a baking oven, and placing in a muffle furnace to roast to obtain the anatase type nanometer titanium dioxide photocatalyst with different spherical particle sizes. The preparation method is used for preparing a titanium dioxide photocatalyst.

The invention belongs to the technical field of fan-shaped sealing block preparation, and particularly relates to a preparation method of a fan-shaped sealing block of a dot matrix cooling structure. A laser selective melting quick molding technology is adopted for preparing the fan-shaped sealing block of the dot matrix structure, the dot matrix structure is composed of dot matrix units, each dot matrix unit is in a shape of a tetrahedron or pyramid or kagome construction, and a back plate of the fan-shaped sealing block is completely covered with the dot matrix structure. According to the preparation method, lasers serve as an energy source, powder bed selective quick molding equipment is used, appropriate fan-shaped sealing block molding direction and technological parameters are set, preparation of the fan-shaped sealing block of the dot matrix structure is further completed through a CAD model directly, a die is not needed, the alloy material using rate is high, the radiating performance of the obtained fan-shaped sealing block is excellent, the molding accuracy is good, and the heat insulation and cooling performance of the fan-shaped sealing block can be greatly improved.

The invention discloses a preparation method of milnacipran hydrochloride, which comprises the following steps: reducing a compound V disclosed as the formula in the specification in an inert solvent by using a reducer, and salifying. The existing compound I is subjected to five-step reaction to generate the compound V, and the compound V is reduced and salified to obtain the milnacipran hydrochloride. Every reaction step is simple to operate and mild in conditions; the obtained intermediate and end product have high yield and high purity; and thus, the invention provides an economical efficient preparation method of milnacipran hydrochloride, which is suitable for industrial production.

The invention belongs to the technical field of guide vane preparation, and particularly relates to a preparation method of a guide vane of a dot matrix cooling structure. A laser selective melting quick molding technology is adopted for preparing the guide vane of the dot matrix structure, the dot matrix structure is composed of dot matrix units, each dot matrix unit is composed of a rod piece, each dot matrix unit is in a shape of a tetrahedron or pyramid or kagome construction, and an inner cavity of a vane body of the guide vane is filled with the dot matrix structure. According to the preparation method, lasers serve as an energy source, powder bed selective quick molding equipment is used, appropriate guide vane molding direction and technological parameters are set, preparation of the guide device vane of the dot matrix structure is further completed through a CAD model directly, a die is not needed, the alloy material using rate is high, the radiating performance of the obtained guide device vane is excellent, the molding accuracy is good, the radiating performance of the guide vane can be greatly improved, and the cooling efficiency is improved.

The invention discloses a preparation method of a heterojunction CoO / CoS porous nanorod, an obtained material and application of the heterojunction CoO / CoS porous nanorod. The method comprises steps: synthesizing cobalt-citrulline nanorods by taking a cobalt salt as a metal source and L-citrulline as a coordination agent through hydrothermal reaction; calcining and oxidizing the nanorods; and finally, vulcanizing through a vapor deposition method to obtain the loose and porous heterojunction CoO / CoS porous nanorod with a rough surface. The heterojunction CoO / CoS porous nanorod catalyst prepared by the invention shows relatively high catalytic activity and stability on electrochemical reaction (OER) of oxygen, is a high-stability anode oxygen evolution catalyst which can be well applied to water electrolysis, and has a wide application prospect in the future energy industry.

The invention discloses a preparation method of N,P-codoped three-dimensional Co nanoflower, an obtained material and application of the material as oxygen to separate out an anode catalyst by electrolysis of water. The method comprises the step of carrying out reduction by taking alkaline metal inorganic salt as a template, taking inorganic cobalt salt as a cobalt source and taking hypophosphiteas a phosphorus source to obtain a N,P-codoped three-dimensional Co nanoflower catalyst. The N,P-codoped three-dimensional Co nanoflower prepared by the method has the advantages of ordered morphology, large surface area, high electrocatalytic activity and the like, is taken as the oxygen to separate out the anode catalyst, and has high catalytic activity and stability. The preparation method is simple and effective, and is universal.

The invention discloses a preparation method for hierarchical pore low-silicate zeolite. The preparation method comprises the following steps: carrying out silanization onto the surface of MCM-41 by utilizing an organic silane coupling agent, and synthesizing A type or X type zeolite with a hierarchical pore structure by one step in a hydrothermal system in a hydrothermal system by taking the MCM-41 as a silicon source, wherein the hierarchical pore A type zeolite morphology is micro-level microspheres, and the X type zeolite is presented as aggregate of nano zeolite crystalline grains. The preparation method disclosed by the invention can be used for preparing the hierarchical pore low-silicate zeolite with large outer surface area and mesoporous pore volume, and porosity and pore diameter of mesopores are easy to regulate and change. Due to existence of hierarchical pores in zeolite, a diffusion path of guest molecules in zeolite crystals can be effectively shortened, diffusion resistance can be lowered, and surface adsorption or availability of catalytic active sites is improved, so that scope of application of the A type and X type zeolite is expanded.

The invention discloses a method for preparing lead halide perovskite, and belongs to the field of lead halide perovskite. According to the method, a self-assembly behavior of hydroxy halide lead oresare regulated and controlled through regulation and control of the composition of ligands, so that hydroxy halide lead ore structures with different micron-sized microscopic shapes can be obtained; and then, Cs<+>, CH3NH3<+> or HC(NH2)2<+> ions are introduced by taking the structures as lead sources and templates, and lead halide perovskite materials with different structures can be obtained. Themethod is economical, simple and reliable, and the prepared lead halide perovskite materials have various three-dimensional structures and adjustable components.

The invention discloses a nano drug-loading system based on poly-salicylic acid, and a preparation method and application thereof. Salicylic acid serving as a monomer is rapidly and conveniently prepared into poly-salicylic acid macromolecules according to a one-step polycondensation method; the poly-salicylic acid macromolecules cover hydrophobic antitumor drugs through self-assembly to form thenano drug-loading system. The drug-loading system has high biocompatibility, moderate size and uniform particle diameter, drug aggregation in tumors can be maintained by the enhanced permeability andretention effect (EPR) of tumor tissues, the bioavailability and the curative effect of the drugs are improved, and a new approach for effective treatment of cancers and other diseases is provided; the nano drug-loading system has the advantages of simple reaction process, few reaction steps, short reaction period, high repeatability and the like, thereby having a good application prospect and a broad development space in the medical field.

The invention discloses a metal oxide / graphitic carbon nitride composite material having a three-dimensional structure, and a preparation method and application thereof. The composite material is prepared by compounding g-C3N4 nanosheets and metal oxides, wherein the mass percent of the g-C3N4 nanosheets is 1-25%.The composite material obtained by the invention is prepared by taking a carbon nitride material having a graphene-like two-dimensional structure after peeling as a template, adding metal oxide precursor and stabilizer, and reacting in a high-pressure reaction kettle under the condition of stirring. Compared with a pure metal oxide, the specific surface area of the composite material is obviously increased; and the defect of the metal oxide such as high agglomeration possibility is overcome, so that the adsorption capacity is greatly improved. Thus, the composite material has favorable application prospects in the aspects of removing sulfides in diesel and the like.

The inventions aims at solving the problem of a supported Co3O4 catalyst for treating nitrobenzene wastewater, provides a Co3O4 / three-dimensional nitrogen-doped graphene hydrogel catalyst for activating persulfate as well as preparation and use methods of the catalyst, and belongs to the technical field of nitrobenzene wastewater treatment. The catalyst is high in catalytic activity, long in service life and easy to separate and recover, and can permanently and efficiently activate the persulfate. According a preparation method of the catalyst, the catalyst is prepared with a hydrothermal method by taking cobalt nitrate as a precursor, natural graphite powder as a main raw material and acrylamide as a nitrogen source. The method is simple, convenient and efficient. By means of polyacrylamide formed by the polymerization of the acrylamide, the nitrogen doping of three-dimensional graphene and the formation and uniform loading of fine-grained Co3O4 by one-step reaction are realized synchronously, so that not only is the catalytic synergy of pyridine nitrogen enhanced carriers fully utilized, but also the catalytic action of Co3O4 is enhanced, and the catalytic performance of the overall catalyst is significantly improved.

The invention belongs to the technical field of organic synthesis route design and medicine and chemical engineering, particularly relates to a synthesis method of a sodium-glucose cotransporter 2(SGLT2) inhibitor, and more particularly relates to a preparation method of empagliflozin. The empagliflozin is synthesized by taking (3S)-3-[4-[(2-chloro-5-iodophenyl) methyl] phenoxy] tetrahydrofuran and glucono delta-lactone as initial raw materials through a series of substep reactions such as protection, addition, substitution, deprotection and reduction. In the synthesis steps disclosed by the invention, a staged target product does not need to be separated and purified after each step of reaction, and the target product is finally obtained by directly subjecting a high-purity reaction intermediate to subsequent steps. The preparation method is simple in process, simple and convenient to operate and good in industrial prospect.

The invention relates to a method for preparing a polymer fluorescent nano particle, which belongs to the field of materials. The invention solves the problems that the traditional polymer fluorescent particle preparation process is complicated and the traditional polymer fluorescent sphere is micron or submicron grade in size and limited in application. The method comprises the following steps of: 1. refluxing by heating for preparing a seleno-sodium sulfate solution; 2. after mixing a seleno-sodium sulfate solution, a cadmium acetate solution, a sodium hydroxide solution, oleic acid and ethanol according to a certain proportion, carrying out heat reaction for preparing a cadmium selenide quantum dot; 3. extracting the quantum dot through styrene and preparing styrene even suspension; 4. carrying out emulsifying polymerization on the styrene suspension and reacting for preparing polystyrene nano fluorescent particle emulsion; and 5. adding salt into the styrene nano fluorescent particle emulsion, centrifuging, dispersing and storing to obtain the polystyrene fluorescent nano particle. The prepared polystyrene fluorescent nano particle can be applied to the fields of biomarkers, optical materials, cell imaging, and the like.