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31results about How to "Thin lamellar" patented technology

Method for preparing phosphaalkene

The invention discloses a method for preparing phosphaalkene. The method comprises the following steps: dispersing black phosphorus into a dispersion liquid, and performing ultrasonic treatment for 0.5-200 hours and then performing solid-liquid separation to obtain intercalation black phosphorus; dispersing the intercalation black phosphorus into a chemical foaming agent solution, performing ultrasonic treatment for 0.5-200 hours and then performing solid-liquid separation, and drying solids subjected to solid-liquid separation to obtain a solid mixture of black phosphorus and a chemical foaming agent; performing microwave treatment on the solid mixture of black phosphorus and the chemical foaming agent under the microwave powder of 100-1,000W, and preparing a finished product phosphaalkene after 1s-1h of microwave treatment. The phosphaalkene prepared by the method disclosed by the invention is proper and uniform in size; furthermore, the technology is simple, the cost is low, the peeling time is short, and the phosphaalkene yield is high; large-scale production is easy to realize.
Owner:延边中电阳光新能源科技有限公司

Preparation method of stratiform bimetallic oxide sorbent capable of effectively removing low-concentrated phosphate radical

The invention discloses a preparation method and application of a stratiform bimetallic oxide sorbent capable of effectively removing low-concentrated phosphate radical. According to the invention, a hydrophobic ionic liquid BmimPF6 is taken as oil phase, and N,N-dimethyl formamide (DMF) is taken as a cosolvent in a Bmim PF6 / DMF / H2O ionic liquid-in-water inverse surfactant-free microemulsion system, a small particle diameter ultrathin stratiform bimetallic hydroxide nanosheets precursor is prepared according to a double microemulsion coprecipitation method, calcination of the precursor is carried out at high temperature of 500 DEG C so as to prepare stratiform bimetallic oxides adsorbent. The obtained stratiform bimetallic oxides are 107.36-158.46 cm<2> / g in specific surface area, 8.56-11.17 nm in pore diameter, and 0.358-0.468 cm<3> / g in pore volume. The stratiform bimetallic oxides can restore and form stratiform bimetallic hydroxide nanosheets in an aqueous medium, wherein the particle diameter of nanosheets is 150-200 nm, the thickness is about 5 nm, and the distribution of particle diameters is uniform. The adsorption rate of the stratiform bimetallic oxides is far higher than that of large-grained hydrotalcite prepared from the precursor stratiform bimetallic oxides of the sorbent according to the traditional coprecipitation method.
Owner:肇庆市高要区永恒之辉金属制品有限公司

Preparation method of graphene powder

ActiveCN106744894AImprove the recovery peeling degreeHigh degree of peelingCarbon compoundsLithiumReduction treatment
The invention relates to the technical field of preparation of nanophase materials, and in particular relates to a preparation method of graphene powder. The preparation method comprises the following steps: (1) preparing a graphene oxide solution; (2) adding organic small molecules to the graphene oxide solution, stirring and drying to obtain graphite oxide containing the organic small molecules; and (3) carrying out heat reduction treatment on the dried graphite oxide containing the organic small molecules to obtain graphene powder. The graphene powder prepared by the method provided by the invention has the characteristics of high degree of peeling, thin sheets, few structural defects, good degree of order and excellent electric conductivity, and has great application prospects in the fields of lithium-ion batteries, supercapacitors and the like.
Owner:BEIJING SINEVA MATERIAL TECH CO LTD +2

Graphene electric-conduction powder coating material, preparation method and use method thereof

The invention provides an electric-conduction powder coating material, which comprises, by weight, 50-70 parts of a resin, 20-40 parts of a filler, 3.5-6.5 parts of a curing agent, 1-3 parts of an auxiliary agent, 0.05-1 part of graphene, and 0.05-0.2 part of wax powder.
Owner:THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH

Nickel metaphosphate micro-nanomaterial as well as preparation method and application thereof

The invention relates to a nickel metaphosphate micro-nanomaterial as well as a preparation method and an application thereof. The micro-nanomaterial has a nano sheet array structure, and the lamellar thickness of nano sheets is less than 20nm. The nickel metaphosphate micro-nanomaterial is prepared through the preparation method comprising the following steps: dissolving a soluble nickel salt and weak base molecules in a solvent to react together with carbon cloth to obtain a nickel-containing precursor / carbon cloth complex, and then performing heat treatment on the nickel-containing precursor / carbon cloth complex and a phosphate compound in an inert atmosphere to obtain the nickel metaphosphate micro-nanomaterial. Based on a structure duplication thought, the invention adopts a two-step method to achieve preparation of a micro-nanostructure and growth of a nickel metaphosphate crystal phase, respectively, the preparation of the nickel metaphosphate micro-nanomaterial with a single crystal phase is achieved, the experiment operation is simple and safe, and scale production and application can be achieved. The prepared nickel metaphosphate micro-nanomaterial has a significant pseudocapacitance characteristic, and the specific capacitance is greater than 2000F / g when the discharge current is 1A / g, so that the nickel metaphosphate micro-nanomaterial has a good potential application prospect in the aspect of electrochemical energy storage.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY

Nickel ferrite nanosheet as well as preparation method and application thereof

The invention provides a nickel ferrite nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, adding ferric salt and nickel saltto water, uniformly mixing; S2, adding a precipitator to solution obtained in the step S1, uniformly mixing; S3, performing hydrothermal reaction on solution obtained in the step S2, purifying a product to obtain a nickel ferrite precursor; and S4, performing high temperature thermal treatment on the nickel ferrite precursor obtained in the step S3 to obtain the nickel ferrite nanosheet. The provided preparation method is safe and stable, pollution-free, easy to obtain raw materials, easy to operate, simple in equipment, and higher in yield, and the prepared nickel ferrite nanosheet is largerin dimension, a sheet layer is thinner, and the appearance is integrated, so the nickel ferrite nanosheet has an extensive application prospect in electromagnetic materials, catalysts and catalyst carriers.
Owner:SHANDONG UNIV

Preparation method of N-doped graphene/graphene nanobelt composite aerogel

The invention discloses a preparation method of N-doped graphene / graphene nanobelt composite aerogel, and belongs to the technical field of composite materials. The preparation method comprises the following steps: 1, preparing a graphene oxide dispersion liquid; 2, preparing a graphene oxide nanobelt dispersion liquid; 3, carrying out pre-reduction freezing evaporation drying treatment; and 4, carrying out high-temperature heat treatment. According to the method, by introducing the graphene oxide nanoribbons, more active sites are provided for N doping, and the N doping concentration can be increased; the three-dimensional porous structure of the aerogel can be regulated and controlled by the content of the graphene nanoribbons; and the N doping degree can adjust the electrical and thermal properties and the chemical activity of the material. The N-doped graphene / graphene nanobelt composite aerogel prepared by the method has ultralow density, high porosity and excellent thermal and electrical properties, and is expected to be applied to the fields of electromagnetic stealth, electrochemistry, catalysis, adsorption, water treatment and the like.
Owner:HARBIN INST OF TECH

Graphene oxide/manganese tungstate/polyethylene glycol nanometer hybrid material and preparation method thereof

The invention relates to a graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material and a preparation method thereof. The preparation method comprises the following concrete steps: separately preparing an alcoholic solution of a divalent manganese salt and an alcoholic solution of nanometer graphene oxide and then carrying out mixing under stirring so as to prepare a mixed solution; preparing an aqueous tungstate solution; and slowly adding the aqueous tungstate solution into the mixed solution, then adding aminocaproic acid, carrying out stirring and heating, then adding polyethylene glycol again, carrying out a continuous reaction for 3 to 5 h, then successively carrying out natural cooling to room temperature, centrifugation and washing, dispersing a solid product in deionized water and carrying out ultrasonic treatment so as to obtain the nanometer hybrid material. Compared with the prior art, the preparation method provided by the invention uses easily available raw materials and is simple in process and good in economic performance and practicality; and the prepared graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material is in a two-dimensional thin laminar shape, has excellent dispersibility and biocompatibility, outstanding photo-thermal effect and obvious imaging effect and can be used for MRI imaging, PA imaging, CT imaging or photo-thermal treatment.
Owner:SHANGHAI NORMAL UNIVERSITY

Method for catalytic preparation of high-purity black phosphorus by adopting fixed bed

The invention discloses a method for catalytic preparation of high-purity black phosphorus by adopting a fixed bed. According to the invention, gaseous phosphorus enters a fixed-bed reactor from the bottom part of the fixed-bed reactor; a solid-state catalyst fills the fixed-bed reactor; under the action of the solid-state catalyst, gaseous phosphorus molecules are converted into gaseous black phosphorus molecules; the gaseous black phosphorus molecules enter black phosphorus crystallizers from the top part of the fixed-bed reactor; the fixed-bed reactor is connected with two black phosphoruscrystallizers; when one of the black phosphorus crystallizers is full, the pipeline valve of the black phosphorus crystallizer is closed, while the pipeline valve of the other black phosphorus crystallizer is opened for collection via the other black phosphorus crystallizer; the gaseous black phosphorus molecules are continuously collected by two black phosphorus crystallizers in turn; gaseous black phosphorus in the black phosphorus crystallizers is condensed into black phosphorus crystals; and catalytically-unreacted gaseous phosphorus returns to the fixed-bed reactor. The method provided bythe invention can prepare high-purity block-shaped black phosphorus, can prepare high-purity nanometer black phosphorus by adjustment and control of the temperature and time of crystallization, and has the advantages of small catalyst loss, low preparation cost and simple operation.
Owner:KUNMING UNIV OF SCI & TECH

Ultrathin graphene and preparation method thereof

The invention relates to graphene, in particular to graphene and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a solid organic matter composed ofglucose, citric acid and fructose, with a molten salt composed of sodium chloride, potassium chloride and calcium chloride according to a weight part ratio of 1: 5-100 to obtain a mixture; and heating to 1000-1400 DEG C at a heating rate of 1-10 DEG C / min in an inert gas environment with a flow rate of 100-800 mL / min, carrying out heat preservation for 3-10 h, and carrying out high-temperature thermal polymerization reaction to generate the ultrathin graphene. According to the method, solid organic matters are used as raw materials for synthesizing the graphene, the mixed metal chloride at the molten state at high temperature is used as a solvent, stacking of carbon sheet layers is inhibited, and finally volatilization is performed to generate the ultrathin and ultralight graphene material.
Owner:FUQING BRANCH OF FUJIAN NORMAL UNIV

Preparation method of stanene powder

The invention provides a preparation method of stanene powder. The preparation method comprises the following steps: cooling a tin ingot with a content of 99.9 percent to minus 20 degrees, so that the tin ingot can be automatically converted into powder, preparing the tin powder into intercalation tin powder, then preparing the intercalation tin powder into a solid mixture of tin powder and a chemical foaming agent, increasing a gap among the intercalation tin powder by virtue of the two steps, so that the intercalation tin powder can easily form stanene; and then microwave processing the solid mixture of the tin powder and the chemical foaming agent to prepare a single-layer to 30-layer finished product stanene, wherein the thickness of a flake layer is 0.5 to 15 nm, and the size is between 50nm and 4000nm. Therefore, the prepared stanene is moderate and uniform in size; and moreover, the process is simple, the cost is low, the stripping time is short, the yield of the stanene is high, and the mass production is easy to realize.
Owner:XIAMEN HOLY ISLAND OF METAL TECH CO LTD

High-quality graphene, heat-conducting and electric-conducting epoxy resin composite material thereof and preparation method thereof

The invention discloses high-quality graphene, a heat-conducting and electric-conducting epoxy resin composite material thereof and a preparation method of the composite material. The preparation method sequentially comprises the following steps: S1, preparing graphene oxide through an improved Hummers method; S2, performing thermal expansion stripping on the graphene oxide powder obtained in thestep S1 through a muffle furnace to obtain reduced graphene oxide with few lamellas; S3, putting the reduced graphene oxide powder obtained in the step S2 into a high-temperature graphitization furnace for thermal repair; and S4, mixing an epoxy monomer, a curing agent and a curing accelerator, adding the graphene powder obtained in the step S3, performing uniform mixing through a planetary defoaming machine, and performing one-step curing to obtain the composite material. The method has the advantages of being simple in process, high in efficiency, large in yield and capable of achieving macroscopic preparation.
Owner:HAIAN INST OF HIGH TECH RES NANJING UNIV

A kind of nickel metaphosphate micro-nano material and its preparation method and application

The invention relates to a nickel metaphosphate micro-nanomaterial as well as a preparation method and an application thereof. The micro-nanomaterial has a nano sheet array structure, and the lamellar thickness of nano sheets is less than 20nm. The nickel metaphosphate micro-nanomaterial is prepared through the preparation method comprising the following steps: dissolving a soluble nickel salt and weak base molecules in a solvent to react together with carbon cloth to obtain a nickel-containing precursor / carbon cloth complex, and then performing heat treatment on the nickel-containing precursor / carbon cloth complex and a phosphate compound in an inert atmosphere to obtain the nickel metaphosphate micro-nanomaterial. Based on a structure duplication thought, the invention adopts a two-step method to achieve preparation of a micro-nanostructure and growth of a nickel metaphosphate crystal phase, respectively, the preparation of the nickel metaphosphate micro-nanomaterial with a single crystal phase is achieved, the experiment operation is simple and safe, and scale production and application can be achieved. The prepared nickel metaphosphate micro-nanomaterial has a significant pseudocapacitance characteristic, and the specific capacitance is greater than 2000F / g when the discharge current is 1A / g, so that the nickel metaphosphate micro-nanomaterial has a good potential application prospect in the aspect of electrochemical energy storage.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY

A kind of method that heat reduction prepares graphene

InactiveCN103011147BGood flame retardation propertiesLow oxygenCarbon compoundsCapacitanceAlkaline earth metal
The invention discloses a method for preparing graphene through thermal reduction. The method comprises the following steps in sequence: processing dispersed graphene oxide colloid through a solution containing alkali metal ion or alkaline earth metal ion, wherein the dispersed graphene oxide colloid is prepared by a Hummers method; drying in vacuum to obtain the graphene oxide containing the alkali metal ion or alkaline earth metal ion; heating and igniting the obtained graphene oxide in order to realize the reduction reaction; washing and filtering the reaction product; and drying to obtain the graphene. The graphene prepared by the method is thin in lamella, dilated and loosen in structure, and few in oxygen-containing functional groups on the surface; and a super capacitor electrode adopting the graphene can generate ideal electrical double-layer resistance in a water electrolyte and reaches the specific capacity of 78F / g; and the graphene has a certain retardant characteristic respect to the combustion flam, so that the graphene can be used as the material of the fire retardant; and the method is simple in process, low in cost, short in production period, and easy for massive production.
Owner:CENT SOUTH UNIV +1

Non-wrinkle graphene and preparation method thereof

The invention belongs to the technical field of graphene preparation methods, and particularly relates to non-wrinkle graphene and a preparation method thereof. The preparation method comprises the following steps: dispersing graphite and a metal salt catalyst into a reaction solvent containing carbonyl, putting the reaction solvent into a reaction kettle, carrying out heating for a reaction to prepare a graphene dispersion liquid, standing the graphene dispersion liquid until layering, removing the supernatant, pickling the residual parts, and dispersing the residual parts in an organic solvent, carrying out ultrasonic treatment and centrifuging, collecting the supernatant turbid liquid, and carrying out drying to obtain the wrinkle-free graphene. Compared with ''rough'' wrinkled graphene, the graphene obtained by the method is flat and is free of wrinkles, and has a good application prospect in the aspects of oxidation resistance and electrical conductivity.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

A preparation method of layered double metal oxide adsorbent for effectively removing low-concentration phosphate

The invention discloses a preparation method and application of a stratiform bimetallic oxide sorbent capable of effectively removing low-concentrated phosphate radical. According to the invention, a hydrophobic ionic liquid BmimPF6 is taken as oil phase, and N,N-dimethyl formamide (DMF) is taken as a cosolvent in a Bmim PF6 / DMF / H2O ionic liquid-in-water inverse surfactant-free microemulsion system, a small particle diameter ultrathin stratiform bimetallic hydroxide nanosheets precursor is prepared according to a double microemulsion coprecipitation method, calcination of the precursor is carried out at high temperature of 500 DEG C so as to prepare stratiform bimetallic oxides adsorbent. The obtained stratiform bimetallic oxides are 107.36-158.46 cm<2> / g in specific surface area, 8.56-11.17 nm in pore diameter, and 0.358-0.468 cm<3> / g in pore volume. The stratiform bimetallic oxides can restore and form stratiform bimetallic hydroxide nanosheets in an aqueous medium, wherein the particle diameter of nanosheets is 150-200 nm, the thickness is about 5 nm, and the distribution of particle diameters is uniform. The adsorption rate of the stratiform bimetallic oxides is far higher than that of large-grained hydrotalcite prepared from the precursor stratiform bimetallic oxides of the sorbent according to the traditional coprecipitation method.
Owner:肇庆市高要区永恒之辉金属制品有限公司

H-type MCM-22 molecular sieve, preparation method and application thereof

ActiveCN112429745AHigh acid center contentA large number of acid centersMolecular sieve catalystsHydrocarbonsMolecular sieveOrganic chemistry
The invention discloses an H-type MCM-22 molecular sieve, a preparation method and application thereof. According to the H-type MCM-22 molecular sieve, diffraction peaks appear when 2 theta is 7.2+ / -0.09 degrees, 8.0+ / -0.10 degrees, 9.6+ / -0.07 degrees, 12.7+ / -0.10 degrees, 14.4+ / -0.07 degrees, 15.8+ / -0.08 degrees, 20.0+ / -0.11 degrees, 22.7+ / -0.15 degrees, 25.1+ / -0.15 degrees, 26.1+ / -0.12 degrees and 26.9+ / -0.13 degrees; the outer surface area is 270-500m<2> / g; and the lamella thickness is 2.5-20nm. The H-type MCM-22 molecular sieve provided by the invention has the advantages that the outer surface area is large, and the lamellar thickness does not exceed 20nm.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method of preparing graphene by using supercritical CO2 assisted liquid phase stripping

The invention relates to a method of preparing graphene by using supercritical CO2 assisted liquid phase stripping. The method comprises the steps that graphite powder and an organic solvent are evenly mixed and then added into a preheated reaction still, CO2 is introduced into the reaction still, continuous stirring is conducted, and a reaction starts to be conducted after the preset supercritical pressure is reached; and after the reaction is completed, the reaction still is cooled to be the CO2 critical point or below, the CO2 is discharged, a solution is taken out to be subjected to ultrasonic treatment and then centrifuged, then supernate is taken, and thus a graphene solution is obtained. The method is easy to operate, mild in condition and high in product quality, the CO2 is environmentally friendly and low in cost, and the using amount of the organic solvent is small; and therefore, the method is a technology, with actual application prospects, for producing the graphene in industrial and environmentally friendly modes.
Owner:霖和气候科技(北京)有限公司

Graphene oxide/manganese tungstate/polyethylene glycol nano-hybrid material and its preparation

The invention relates to a graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material and a preparation method thereof. The preparation method comprises the following concrete steps: separately preparing an alcoholic solution of a divalent manganese salt and an alcoholic solution of nanometer graphene oxide and then carrying out mixing under stirring so as to prepare a mixed solution; preparing an aqueous tungstate solution; and slowly adding the aqueous tungstate solution into the mixed solution, then adding aminocaproic acid, carrying out stirring and heating, then adding polyethylene glycol again, carrying out a continuous reaction for 3 to 5 h, then successively carrying out natural cooling to room temperature, centrifugation and washing, dispersing a solid product in deionized water and carrying out ultrasonic treatment so as to obtain the nanometer hybrid material. Compared with the prior art, the preparation method provided by the invention uses easily available raw materials and is simple in process and good in economic performance and practicality; and the prepared graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material is in a two-dimensional thin laminar shape, has excellent dispersibility and biocompatibility, outstanding photo-thermal effect and obvious imaging effect and can be used for MRI imaging, PA imaging, CT imaging or photo-thermal treatment.
Owner:SHANGHAI NORMAL UNIVERSITY

Epoxy resin/montmorillonite nano composite coating for metal surfaces

The invention relates to epoxy resin / montmorillonite nano composite coating for metal surfaces, and a method for preparing a composite film by using the nano composite coating. Lithium chloride is used to peel montmorillonite lamellas, and cetylamine is used to organically modify the montmorillonite after peeling, so that the hydrophilic montmorillonite is converted to lipophilic montmorillonite,the distance between montmorillonite layers is extended, and interlayer force is weakened so that the montmorillonite more uniformly dispersed in a polymer. The preparation method of the coating us simple, and does not need complex equipment, and sodium-based montmorillonite reserves are huge, so that the method is suitable for industrial production.
Owner:ZHEJIANG UNIV OF TECH

A kind of preparation method and application of large-area graphene

The invention discloses a preparation method and application of large-area graphene. The method comprises the steps of mixing an oxygen-containing organic polymer and a nickel salt, placing the mixture in an inertia atmosphere for calcination, washing the calcinated product with an acid liquid, and drying the product to obtain the large-area graphene. The method is simple and convenient to operate, and is short in period and high in yield, and industrial production is facilitated; and the obtained large-area graphene can be used as a sodium ion battery electrode material and has excellent electrochemical performance.
Owner:CENT SOUTH UNIV

A kind of wrinkle-free graphene and preparation method thereof

The invention belongs to the technical field of graphene preparation methods, and particularly relates to non-wrinkle graphene and a preparation method thereof. The preparation method comprises the following steps: dispersing graphite and a metal salt catalyst into a reaction solvent containing carbonyl, putting the reaction solvent into a reaction kettle, carrying out heating for a reaction to prepare a graphene dispersion liquid, standing the graphene dispersion liquid until layering, removing the supernatant, pickling the residual parts, and dispersing the residual parts in an organic solvent, carrying out ultrasonic treatment and centrifuging, collecting the supernatant turbid liquid, and carrying out drying to obtain the wrinkle-free graphene. Compared with ''rough'' wrinkled graphene, the graphene obtained by the method is flat and is free of wrinkles, and has a good application prospect in the aspects of oxidation resistance and electrical conductivity.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

a supercritical co 2 Method for preparing graphene with assisted liquid phase exfoliation

The invention relates to a method utilizing supercritical CO 2 A method for preparing graphene by assisted liquid phase exfoliation, mixing graphite powder and organic solvent evenly, adding it to a preheated reaction kettle, feeding it into the reaction kettle and continuously stirring, and starting the reaction after reaching the preset supercritical pressure; the reaction After the end, the reactor was cooled to CO 2 Below the critical point, CO is emitted 2 , the solution is taken out for ultrasonic treatment, and the supernatant is taken after centrifugation to obtain a graphene solution; the method of the present invention is simple to operate, mild in condition, high in product quality, and CO 2 Environmental protection, low cost, and less organic solvent consumption; therefore, this method is a technology for industrialized green production of graphene with practical application prospects.
Owner:霖和气候科技(北京)有限公司

Homogeneous C and N co-doped phosphate material as well as preparation method and application thereof

The invention discloses a homogeneous C and N co-doped phosphate material as well as a preparation method and application thereof, and belongs to the technical field of electrochemical catalysts. The invention provides a method for preparing a heteroatom-doped material with universality under a low-temperature environment-friendly condition by utilizing a host-guest template method, which specifically comprises the following steps: inserting organic amine serving as a template in the middle of an inorganic layer to quickly prepare a 2D phosphate material on a large scale, and then conducting annealing to obtain a homogeneous C and N co-doped phosphate material. The homogeneous C and N co-doped phosphate material disclosed by the invention has excellent electro-catalytic performance and supercapacitor performance, and can be applied to new energy conversion materials such as electrode materials in metal-air batteries, fuel-cell water-system batteries and the like, and electrochemical energy storage devices such as supercapacitors and the like.
Owner:JIANGNAN UNIV
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