267results about How to "Suitable for large-scale preparation" patented technology

The invention relates to a preparation method of grapheme transparent conducting films, comprising the following steps: taking natural graphite powder as raw materials; ultrasonically stripping in 0.5-1.0% by volume of AMP, 0.4% by volume of water and DMF solution to prepare high-concentration grapheme dispersion liquid; taking the prepared grapheme dispersion liquid as electrolyte; preparing grapheme conducting films by electrophoretic deposition, transferring the grapheme conducting films onto a glass substrate; controlling the electrophoretic deposition voltage and the electrophoretic deposition time to prepare the grapheme conducting films with different thicknesses and improving light transmission and conductivity of the grapheme conducting films through the heat treatment and acid processing technology. The grapheme transparent conducting films prepared by the method has flat surface and less defect; the prepared grapheme transparent conducting films has the light transmittance of 82.1% and the film resistance of 1.0 microhm/sq. Compared with the other preparation method, the method has the advantages of simple operation, easy control and lower coat and is suitable for large-scale preparation.

The invention discloses a transfer print method with the shape memory effect, and belongs to the technical field of engineering materials, flexible electronic preparing and mechanical experimental equipment. According to the method, a shape memory polymer with magnetic nanometer particles, functional units and a mold with a concave microstructure on the surface are utilized, the steps that equal pressure and a radio frequency electric field are exerted on the shape memory polymer are carried out, transfer printing of the functional units to a flexible base body can be selectively carried out, and the transfer print method is particularly suitable for preparing automatically-controlled large-scale inorganic flexible expandable electronic devices.

The invention relates to a method for synthesizing a NaA molecular sieve membrane. A seed crystal coating mode of combining the coating and the dipping of seed crystal is used for the synthesis of the molecular sieve membrane. Firstly, a supporting body is polished by sand paper and is dried; a seed crystal paste is coated on the surface of the supporting body to remove the possible defects on the surface of the supporting body; secondly, the seed crystal is precoated by a lifting and dipping method; and finally the NaA molecular sieve membrane is synthesized by a hydrothermal synthesis method. The NaA molecular sieve membrane synthesized by the method has continuous and compact surface, excellent separation performance and good repeatability and is suitable for scale preparation.

The invention provides a preparation method of a boron nitride fiber three-dimensional structure material and the product of the boron nitride fiber three-dimensional structure material. According tothe preparation method, melamine and boric acid are taken as raw materials, water is taken as a reaction medium, and M.2B (with an English name of Melamine diborate) fibrils can be prepared by means of simple and convenient water bath synthesis; furthermore, the prepared fibrils are taken as a raw material, and a fibril-based three-dimensional net structure is obtained by adopting a freeze-moldingtechnology; the fibril-based three-dimensional net structure is converted into a boron nitride fiber three-dimensional structure by means of the conventional heat treatment process. The technical method provided by the invention is simple and convenient in technology, low in raw material cost and environmentally-friendly; the material provided by the invention has the three-dimensional net structure taking boron nitride fibers as structural units and has the characteristics of being light in weight, high in strength and hydrophobic, thus having wide application prospect in the fields of pollutant treatment, catalyst carriers and enhanced functional composite materials.

The invention discloses a hydrothermal synthesis method of carbon quantum dots from cotton. The method comprises the following steps: weighing certain amounts of cotton and acidic catalyst, adding into a right amount of water, carrying out hydrothermal reaction for some time, filtering the reaction product, and dialyzing to obtain the carbon quantum dots. The method has the advantages of wide carbon sources and simple preparation process, can implement mass production, and is a green method for synthesizing carbon quantum dots.

The invention provides a preparation method of a ZnO/zinc-indium-sulfur nanoheterojunction. An atomic layer deposition and hydrothermal method is taken into consideration, the in-situ growth of a ZnIn2S4 nanosheet array structure on a fluorine-doped tin oxide (FTO) substrate is achieved, a certain thickness of ZnO thin film is deposited by the ALD technology, and a ZnO/ZnIn2S4 nano-heterojunctionstucture is constructed, and the heterojunction of the ZnIn2S4 nanosheet array thin film with efficient visible-light photocatalytic activity is obtained. The visible-light absorptivity is improved, photon-generated carriers can be effectively separated at an interface, and the photocurrent density is greatly improved. The whole preparation process is simple, controllable, green, high in repeatability and suitable for large-scale preparation, and has great application prospects in the engineering fields such as photocatalysis.

The invention belongs to the technical field of organic chemistry, and particularly relates to a method for preparing a 3-sulfonyl coumarin compound. According to the method, arenediazonium salt, phenyl ester phenylpropiolate and DABCO.(SO2)2 react in an organic solvent to prepare the 3-sulfonyl coumarin compound. The structure of the compound is represented through the 1 H NMR, 13 C NMR, HRMS and single crystal x-ray diffraction analysis methods and determined. According to the method, under very mild and simple conditions, DABCO.(SO2)2 serves as a sulfur dioxide source, sulfur acylation reaction is achieved directly, and the 3-sulfonyl coumarin compound is built. Raw materials in the reaction are easy to obtain, cost is low, use of a sulfonyl chloride intermediate in a traditional synthesis method is avoided, and the method can be suitable for large-scale preparation and has very good application prospects.

The invention relates to a preparation method for a WO3/CuWO4/NiFe LDH ternary composite photoelectrode film, and belongs to the technical field of photoelectrocatalysis. According to the composite photoelectrode, key problems of low WO3 stability, weak product selectivity and the like can be overcome; long-term stable operation in a photochemical water decomposition process is realized successfully; the composite photoelectrode has an extremely high application value. The preparation method for the ternary composite photoelectrode film mainly comprises the following steps: taking sodium tungstate and ammonium oxalate as raw materials; carrying out a hydrothermal reaction for 6 hours at 140 DEG C to synthesize a WO3 film electrode; adding an acetic acid solution of copper nitrate on the surface of the WO3 film electrode dropwise in an impregnating manner; performing high-temperature calcining at 500 DEG C, wherein part WO3 reacts with CuO to generate copper tungstate to obtain a WO3/CuWO4 film electrode; then, preparing an electrolyte solution of ferric nitrate and nickel nitrate, and loading a NiFe layered compound onto the surface of the WO3/CuWO4 film electrode according to an electrodepositing method to finally obtain the WO3/CuWO4/NiFe LDH ternary composite photoelectrode film.

The invention provides a phosphate lithium fast ion conductor material and a preparation method thereof. Specifically, the invention provides a method for preparing a Li1+x+y+zAlxGe2-xSiyP3-yO12+z/2 fast ion conductor material. The method comprises the steps of: providing a powder of glass powder or amorphous powder with the above-described ratio of elements; molding the powder to obtain a molded glass body; annealing the molded glass body to obtain the fast ion conductor material, wherein x, y and z satisfy the relations of 0<x<=2,0<=y<=0.4,0<=z<=0.5. The preparation method of the invention has the characteristics of convenience, high yield, and suitability for industrialized preparation; and the prepared material has very good electrical properties.

The invention relates to the technical field of batteries, and in particular relates to a coated lithium ion battery high-nickel positive electrode material and a preparation method thereof. Accordingto the coated lithium ion battery high-nickel positive electrode material and the preparation method thereof provided by the invention, a high-nickel positive electrode material is subjected to mechanical fine grinding and dissociation to form primary particles, and then the particles are added into an aluminum-containing organic solution, a titanium-containing organic solution or a zirconium-containing organic solution; after the mixture is uniformly mixed, closed-type circulating spray drying is adopted, and the dried mixture is sintered to obtain the high-nickel positive electrode material, wherein the surfaces of the primary particles and the secondary particles are both coated with a lithium ion conductor compound. According to the method, the effect of remarkably reducing the content of the residual alkali substance is achieved, and the cycle and storage performance of the material are obviously improved. The preparation method disclosed by the invention is simple in process andsuitable for large-scale preparation and has a relatively high application prospect.

The invention relates to a hexagonal column type WO3/Bi2WO6 composite photoelectrode film preparation method, and belongs to the technical field of material preparation, wherein the prepared compositephotoelectrode has characteristics of novel morphology, regular structure, high photon-generated carrier separation efficiency and excellent photoelectrocatalytic water decomposition performance, andcan achieve the continuous and stable hydrogen production under visible light. The preparation method mainly comprises: carrying out a hydrothermal reaction for a certain time by using sodium tungstate and ammonium oxalate as precursors and using an FTO electric-conduction glass as a substrate to grow a nano-plate-shaped WO3 film on the FTO substrate in in-situ; and adding a certain volume of theacetic acid aqueous solution of bismuth nitrate to the surface of the film as a template in a dropwise manner, carrying out high-temperature calcination, and self-assembling the nano-plate WO3 film into the hexagonal column type WO3/Bi2WO6 composite film. According to the present invention, the composite photoelectrode has characteristics of simple preparation process, controllable condition andlow cost, and has wide application prospect in the field of future energy.

The invention discloses a purifying method of ularitide, appropriate column separation conditions can be obtained by optimization of conditions, and the appropriate column separation conditions are further enlarged onto a dynamic axial compression industrial preparative chromatography system for separation for obtaining of high purity ularitide. The advantages of the method are that, good effect of separation and purification can be achieved by direct use of the dynamic axial compression industrial preparative chromatography for separation of an extracted crude product, the method has the advantages of simple operation, short period and high efficiency, and the purity can reach more than 98%.

The invention discloses a carbon-nitrogen catalyst for photosynthesizing hydrogen peroxide and a preparation method thereof. The preparation method comprises the following steps of: roasting organic matter powder containing carbon and nitrogen in air or inert atmosphere to obtain C3N4 solid powder; then grinding the C3N4 to mix with sugar liquid, and carrying out carbonation reaction in a hydrothermal reactor to obtain C3N4 modified by amorphous carbon; and then roasting in the inert atmosphere to obtain the carbon-nitrogen catalyst (CxNy). The adopted materials are rich in source, is non-toxic, has the characteristics of being environmentally friendly and sustainable and being low in cost, and is suitable for large-scale production. The carbon-nitrogen catalyst is used for producing H2O2 by using water, oxygen and a little amount of alcohol and utilizing sunlight as an energy donor, the whole process does not use any toxic reagent and toxic solvent, has no emission of wastes and waste water, is mild in reaction condition and is environmentally friendly and free of pollution.

The invention relates to a method for simultaneously extracting and separating glycyrrhizic acid and glycyrrhiza flavonoids of glycyrrhiza based on continuous chromatography and belongs to the field of natural medicine extraction. Radix glycyrrhizae is smashed and then undergoes extraction by ammonia and alcohol, continuous chromatographic adsorption, ethanol eluting 1, combined spin, polyamide adsorption, ethanol eluting 2 and rotary drying to obtain glycyrrhiza flavonoids; NaOH aqueous solution elution, pH adjustment, spin drying, filtering drying and recrystallization are performed to obtain glycyrrhizic acid. A production device adopted for the method is a continuous chromatographic separation system which is controlled under a logic control valve and is composed of 12 chromatographic columns, and the chromatographic column in the system is divided into four areas which are an adsorption area, a flavonoid analysis area, a glycyrrhizic acid analysis area and a resin regeneration area. The production process is simple to operate, the glycyrrhizic acid and glycyrrhiza flavonoids can be extracted simultaneously, waste of the glycyrrhiza flavonoids in conventional industrial production is reduced, the acid liquor pollution is avoided, so that the yield and purity of the obtained glycyrrhizic acid and glycyrrhiza flavonoids are high, and the method can be suitable for large-scale production.

The invention discloses a method for purifying alpha1-antitrypsin from a Cohn component IV precipitate. The method comprises the following steps of sequentially carrying out dissolution and concentration, PEG precipitation, primary viral inactivation, primary ultrafiltration and concentration, thrice chromatography refining, freeze-drying, and secondary viral inactivation on the Cohn component IV precipitate, thus finally obtaining the alpha1-antitrypsin. According to the method provided by the invention, the Cohn component IV precipitate which is a waste of albumin produced by a low-temperature alcohol method is adopted as a starting material for preparing AAT, so that the comprehensive utilization ratio of raw blood plasma is favorably improved. During the whole process of the method, PEG precipitation is combined with anion exchange chromatography and twice blue dyestuff affinity chromatography, so that the impurity protein can be effectively removed, an AAT preparation with the purity being larger than 95 percent is finally obtained, and the specific activity is larger than 3,900U/mg.

The invention relates to a barium strontium titanate ferroelectric nano single crystal particle and a preparation method thereof. Pure Sr(NO3)2, Ba(OH)2.8H2O and TiCl4 serve as raw materials, de-ionized water and 1,4-butanediol serve as reaction medium and oleic acid serves as surfactant; at the absence of mineralizer, the nucleation-growth process is controlled by alcohol heat action in an autoclave to synthesize and obtain barium strontium titanate ferroelectric nano single crystal particles. The barium strontium titanate ferroelectric nano single crystal particle prepared by the invention has the characteristics of accurate chemical composition, regular cubic appearance, near single dimension, favourable dispersion stability and the like. The ferroelectric nano single crystal material can be used for self-assembly aiming to the nanometer ordered array structure of super high density ferroelectric memory, and the microstructural characteristics of the invention have not been reported publicly so far.