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Metallic oxide material with mesoporous-macroporous composite structure as well as preparation method and application thereof
ActiveCN103048363ALarge specific surface areaHigh specific surface areaMaterial resistanceAlcoholNanoparticle
The invention discloses a metallic oxide material with a mesoporous-macroporous composite structure as well as a preparation method and an application thereof. The metallic oxide material is in the shape of a thin film with a thickness of 0.3-10 microns, and consists of spherical holes or semispherical holes with a hole diameter being 100-2000nm; hole walls consist of nanometer particles with grain sizes being 10-50nm; and mesopores with hole diameters being 2-50nm are formed among the nanometer particles. The preparation method comprises the following steps: firstly, reacting glucose, water and hexadecyl trimethyl ammonium bromide in a sealed state to obtain an intermediate product; secondly, centrifuging, washing and drying the intermediate product so as to obtain carbon spheres; thirdly, mixing metal salt, the carbon spheres and ethanol, then ultrasonically conducting back-flowing so as to obtain the carbon spheres and a metallic oxide precursor mixture; fourthly, coating the carbon spheres and the precursor mixture on a substrate; and finally, sequentially aging and forging the substrate so as to manufacture a target product. The metallic oxide material can be used as a gas sensitive element; and concentrations of benzene gas, ketone gas, alcohol gas and aldehyde gas can be measured by using resistance variation after gas to be detected is adsorbed.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Hollow ball micro/nano structure array with silver nano plates as basic elements and preparation method thereof
InactiveCN102464295AIncrease surface areaRich optical propertiesDecorative surface effectsVacuum evaporation coatingNano structuringPolystyrene
The invention discloses a hollow ball micro / nano structure array with a plurality of silver nano plates as basic elements and a preparation method thereof. In the array, a hollow gold ball array is arranged on a substrate, fan-shaped silver nano plates are arranged on gold ball shells in a crossing and standing way, wherein the inside diameter of the gold ball shells is 1-10mu m, the thickness of the gold ball shells is 15-25nm, the height of the fan-shaped silver nano plates is 500mn to 1mu m, the width of the fan-shaped silver nano plates is 200-500nm, the thickness of the fan-shaped silver nano plates is 20-30nm, and the gold ball shells are made of single silver crystal. In the method, polystyrene colloidal balls with the diameter being 1-10mu m are attached to the surface of the substrate at first to form a single-layer colloidal crystal template, a gold film is evaporated on the surface of the single-layer colloidal crystal template, the single-layer colloidal crystal template with the evaporated gold film on the surface is placed in silver electrolyte for electrodeposition, intermediate products are obtained after cleaning and drying and are then placed in dichloromethane solution to dissolve polystyrene colloidal balls, and thus the hollow ball micro / nano structure array with the silver nano plates as the basic elements is prepared. The hollow ball micro / nano structure array can be used as an SERS (surface enhanced Raman scattering) active substrate for rapid trace detection of a variety of organic pollutants.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Micron semisphere composed of silver nano-flakes as well as preparation method and use thereof
InactiveCN102233433AQuick checkPreparation method sciencePolycrystalline material growthSingle crystal growth detailsSingle crystalSpectrometer
The invention discloses a micron semisphere composed of silver nano-flakes as well as a preparation method and a use thereof. The micron semisphere with the diameter of 1-30mu m is formed by stacking the silver nano-flakes adhered to a conducting substrate into a sector plate, wherein, the plane of the sector plate is vertical to the center of the semisphere; and the nano-flakes forming the sector plate are of a single crystal structure of silver, the length is 0.5-15mu m, the width is 20nm-1mu m and the thickness is 20-50nm. The preparation method comprises the following steps: firstly evenly mixing a silver nitrate aqueous solution with the concentration of 2-32g / L and a citric acid aqueous solution with the concentration of 8-144g / L based on the volume ratio of (0.8-1.2): (0.8-1.2) to obtain an electrolyte; and taking the conducting substrate as a cathode and a graphite flake as an anode to be placed in the electrolyte, and carrying out electro-deposition under constant current with the density of 0.1-1mA / cm<2> for 10-180 minutes to finally obtain the micron semisphere composed of the silver nano-flakes. The obtained micron semisphere can be utilized as a surface enhanced Ramanscattering (SERS) active substrate so as to measure content of rhodamine or polychlorinated biphenyls (PCBs) or p-methyl benzenethiol adhered thereon by utilizing a confocal Raman spectrometer.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Mercapto-beta-cyclodextrin modified silver nano-rode array, its preparation method and its use
InactiveCN102776536AEfficient detectionEnhanced Raman Scattering (SERS) EffectMaterial nanotechnologySurface reaction electrolytic coatingGold filmBeta-Cyclodextrins
The invention discloses a mercapto-beta-cyclodextrin modified silver nano-rod array, its preparation method and its use. The array is a silver nano-rod array with the surface modified by mercapto-beta-cyclodextrin, wherein the lengths of silver nano-rods are 150-600nm, the diameters of the silver nano-rods are 60-90nm, the space between each two silver nano-rods is 10-40nm, and the substrate of the array is formed by superposing one or more than two of a silver film, a gold film, a copper film and a nickel film which have the thicknesses of 20-50mum. The preparation method comprises the following steps: obtaining a through hole alumina template through using a secondary anode oxidation method, sputtering a metal conductive film on one surface of the through hole alumina template through using an ion sputtering method to obtain an alumina template with the metal conductive film, carrying out electric deposition through placing the alumina template with the metal conductive film in a silver electrolyte to obtain an alumina template with holes provided with the silver nano-rods and one surface coated with the metal conductive film, etching off the alumina template through putting the resultant alumina template in an acidic or strongly alkaline solution, and immersing the resultant material in an aqueous solution of the mercapto-beta-cyclodextrin for at least 1h to prepare the mercapto-beta-cyclodextrin modified silver nano-rod array. The mercapto-beta-cyclodextrin modified silver nano-rod array can be used for rapidly detecting trace PCB77 or PCB101.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as preparation method and application thereof
InactiveCN102649046AIncrease the areaHigh porosityOther chemical processesAlkali metal oxides/hydroxidesCongo redMesoporous silica
The invention discloses a nanometer ferroferric oxide core-carbon meso pore hollow shell complex, as well as a preparation method and application thereof. The complex is formed by ferroferric oxide particles and a carbon shell sleeved and sealed outside, wherein the carbon sheel is of a mesoporous structure with the hole diameter being 1-5nm; the grain size of the ferroferric oxide particles is 8-12nm; the external diameter of a carbon mesoporous shell is 80-100nm; the thickness of the shell is 10-20nm; and the diameter of a hollow part between the ferroferric oxide and the carbon mesoporous shell is 30-60nm. The preparation method comprises the following steps of: synthetizing ferroferric oxide nanometer nanometers through a high-temperature reflux method, using a microemulsion method to obtain a ferroferric oxide core silicon dioxide shell powder body; then depositing a layer of mesoporous silicon dioxide on the surface of a silicon dioxide shell through a chemical method to obtain a three-layer core shell structure; taking the three-layer core shell structure as a hard template, and depositing carbon in clearances of the mesoporous silicon dioxide; and finally, etching the silicon dioxide by utilizing strong alkali solution, thereby obtaining a target product. The nanometer ferroferric oxide core-carbon meso pore hollow shell complex can be used for carrying out adsorption processing in solution polluted by methylthionine chloride, congo red or phenol.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Preparation of red strontium sulphide long afterglow material
InactiveCN101328405AEasy to controlWell mixedLuminescent compositionsSolubilitySurface-active agents
The invention discloses a method for preparing a red strontium sulphide long afterglow material, comprising a hydrothermal coprecipitation method which comprises the following steps that: (a) water-solubility strontium salt, water-solubility europium salt, water-solubility dysprosium salt, carbamide and water are weight according to the mol ratio of 1: between 0.01 and 0.05: between 0.01 and 0.05: between 4 and 6: between 28 and 32 and are put inside a container to be stirred and dissolved, the mixture is insulated in a sealing state at a temperature of between 80 and 160 DEG C for 5 to 24 hours so that a precursor is obtained; (b) the precursor is subject to filtering and annealing at a temperature of between 900 and 1200 DEG C in the reaction environment for 0. 5 to 2 hours so that the red strontium sulphide long afterglow material is prepared; the water-solubility strontium salt is strontium nitrate or strontium chloride or strontium acetate, the water-solubility europium salt is europium nitrate, europium chloride or polyimide, the water-solubility dysprosium salt is dysprosium nitrate or dysprosium chloride or dysprosium acetate, and a surface active agent is added according to the mol ratio of the water-solubility strontium salt to the surface active agent of 1: between 0.0001 and 0.0003. The method is widely applied to the fields such as building decoration, traffic transportation, military facilities, fire emergency service and goods for everyday consumption.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Cobalt-modified bismuth tungstate composite photocatalyst, its preparation method and application thereof
InactiveCN102764659ALarge specific surface areaImprove stabilityWater/sewage treatment by irradiationMetal/metal-oxides/metal-hydroxide catalystsTungstateSodium tungstate
The invention discloses a cobalt-modified bismuth tungstate composite photocatalyst, its preparation method and an application thereof. Bismuth tungstate in the catalyst is granules with the particle size being 0.5-3 microns and the catalyst is composed of bismuth tungstate pieces, the length of which is 30-100 nm and the thickness of which is 5-10 nm. Cobalt oxide granules with the particle size being 10-100 nm are modified on the bismuth tungstate pieces. The specific surface area of the catalyst is 5-20m<2> / g. The preparation method comprises the following steps of: respectively adding bismuth nitrate into a nitric acid solution with stirring to obtain a bismuth nitrate solution and adding cetyl trimethyl ammonium bromide into a sodium tungstate solution with stirring to obtain a mixed solution, adding the bismuth nitrate solution into the mixed solution, placing in an enclosed state, keeping warm at 160-180 DEG C for 20-24 h, centrifuging, washing, drying to obtain a bismuth tungstate powder, adding the bismuth tungstate powder into a cobaltite solution, stirring, drying, grinding into a powder, and roasting the powder to prepare the target product. The product can be used in water polluted by organic matters or heavy metal ions to perform visible light photodegradation.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Preparation method for silver nanoparticle chain
ActiveCN103111621APreparation method scienceEfficient manufacturing methodNanotechnologyElectrolytic agentMetallic materials
The invention discloses a preparation method for a silver nanoparticle chain. At first, an aluminum sheet is processed through an anodic oxidation method so that a through-hole alumina template is obtained; a gold film is plated on one side of the through-hole alumina template in an evaporated mode and then the through-hole alumina template is used as a negative pole and placed in silver electrolyte and bismuth electrolyte respectively for multiple times of alternative electrolytic depositions, so that the alumina template is obtained, wherein the through holes of the through-hole alumina template are placed with the silver cylinders and the bismuth cylinders, the silver cylinders and the bismuth cylinders are connected alternatively and one side of the alumina template is plated with the gold film; then the alumina template is soaked in aqueous alkali, so that a nanowire array which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is obtained; and then the nanowire array is placed in ethylalcohol for ultrasonic dispersion, so that a nanowire which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is obtained; and the nanowire which is formed by the alternative connection of the silver cylinders and the bismuth cylinders is placed in an environment with a vacuum degree<=10 Pa to 3 Pa and a temperature 450 DEG C to 500 DEG C to be annealed for 2 hours to 6 hours, so that a target product is obtained. The preparation method for the silver nanoparticle chain has the advantages of being simple in process, low in cost, high in practical value, and capable of being widely used in the preparation of one-dimensional nanoparticle chains of various metal materials.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Lithium lanthanum bismuthate-based solid electrolyte material and preparation method thereof
InactiveCN102044700AIncreased overall conductivity at room temperatureReduce the temperatureFinal product manufactureElectrolyte accumulators manufactureWater soluble polymersWater soluble
The present invention discloses Lithium lanthanum bismuthate-based solid electrolyte material and preparation method thereof. The chemical formula of the material of Lithium lanthanum bismuthate-based solid electrolyte after the doping of lanthanum and the doping of lithium are conducted is La(3-x)AxLi(5+delta)Bi(2-y)ByO12. In the formula, A is the lanthanum position dopant, X is a value from 0 to 1.25, B is the bismuth position dopant, and Y is a value from 0 to 1.25. The preparation method of the material is as follows: according to the formula, weighing nitrates or carbonates or chlorides or acetates or alkoxides or oxides soluble in acids of lithium, lanthanum, bismuth, the lanthanum-position dopant and / or the bismuth-position dopant, preparing a solution by using the above chemicals,adding a lanthanum salt solution, a bismuth solution, a solution of lanthanum-position dopant and / or a solution of bismuth-position dopant dropwisely, adding citric acid and nitric acid successively to obtain a sol, adding a water-soluble polymer into the sol to form a gel, drying the gel, performing heat treatment to obtain nanocrystal powder, moulding the powder into a green body, and calciningto obtain the Lithium lanthanum bismuthate-based solid electrolyte material. The prepared material can be used as a solid electrolyte material and can be applied to all-solid-lithium ion battery.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nano composite ethylene-propylene rubber cable material and its preparation method
ActiveCN102344610AGood dispersionImproved and stabilized flame retardancyPlastic/resin/waxes insulatorsInsulated cablesActive agentMining industry
The invention discloses a nano composite ethylene-propylene rubber cable material and its preparation method. The material is composed of ethylene-propylene-diene rubber, a nano compound, an organic modifier, inorganic metal hydroxide, an aging resister, a curing active agent and a peroxide according to 100:1-20:0.5-10:50-200:0.5-10:10-20:0.1-10, wherein, the nano compound is nano montmorillonite and nano calcium carbonate according to the weight ratio of 1:0.5-2, the organic modifier is a silane coupling agent or a titanic acid coupling agent or methacrylic acid or acrylic acid, the curing active agent is zinc oxide and stearic acid, the peroxide is dicumyl peroxide. The preparation method comprises the following steps: proportioning the raw materials according to the weight, successively adding the raw materials with the corresponding weight into an open mill or an internal mixer for mixing, placing on a plate vulcanizing machine for vulcanizing, producing the products with zero-halogen flame-retardant, age resistance and excellent mechanical property. The products is suitable for the occasions with requirement of zero-halogen flame-retardant, age resistance and frequent movement in the nuclear power plants, warships, mining industry and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Micro-nano structure zinc oxide-carbon composite pellet and preparation method thereof
InactiveCN103145113ALarge specific surface areaTightly boundMaterial nanotechnologyZinc oxides/hydroxidesCarbon compositesMicro nano
The invention discloses a micro-nano structure zinc oxide-carbon composite pellet and a preparation method thereof. The micro-nano structure zinc oxide-carbon composite pellet is obtained by hybridization compounding of zinc oxide and carbon to obtain a solid pellet having the diameter of 6-12 micrometers, wherein vertical nanosheets having the length of 700-900 nanometers, the height of 700-900 nanometers and the thickness of 15 to 25 nanometers are formed on surfaces of the solid pellet and are connected with each other into a nest; a mole ratio of zinc oxide to carbon is (60-70%): (30-40%); zinc oxide has a hexagonal structure; and carbon comprises amorphous carbon and graphitized carbon and a weight ratio of the amorphous carbon to the graphitized carbon is (85-95%): (5-15%). The preparation method comprises the following steps of dissolving zinc acetate dihydrate, urea, sodium citrate dihydrate and glucose in water to obtain a mixed solution, carrying out hydrothermal treatment on the mixed solution to obtain a reaction solution, orderly carrying out solid-liquid separation, washing and drying to obtain an intermediate product, putting the intermediate product in an inert gas atmosphere, and carrying out annealing to obtain the micro-nano structure zinc oxide-carbon composite pellet. The micro-nano structure zinc oxide-carbon composite pellet can be widely used for fields of catalysis, adsorption and photoelectricity.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
Porous aluminum oxide film light filter with bifurcate holes and preparation method thereof
InactiveCN101520525AImplement filteringAvoid aging problemsAnodisationOptical filtersOptoelectronicsLight filter
The invention discloses a porous aluminum oxide film light filter with branching holes and a preparation method thereof. A light filter is provided with the holes of a porous aluminum oxide film, which are linear through-holes with the aperture of 40-60nm; the hole wall thereof is provided with more than two layers of branching holes, the aperture of each of which is 20 nm to 40nm, and the angles between the branching holes and the linear through-holes are 50 degrees to 70 degrees; a trunk layer consisting of the linear through-holes among the branching holes and a branching layer consisting of the branching holes change periodically; and the thickness of the film is 60 Mum to 180 Mum. The light filter is used for filtering light with the wave band of 500nm to 1500nm. The method comprises the following steps of placing an aluminum sheet in acid solution with the concentration of 0.2M to 0.4M and carrying out anodic oxidation for at least 5 minutes under the curved tooth wave voltage, wherein the wave amplitude of the curved tooth wave voltage is 22V to 50V, the wave front is of 45 degrees, and the wave period is 2.5 minutes to 3.5 minutes; then a porous aluminum oxide film light filter with bifurcate holes is prepared; the purity of the aluminium sheet is no less than 99.9 percent; and the anodic oxidation is carried out for 14 hours to 20 hours under the curved tooth wave voltage. The porous aluminum oxide film light filter can carry out selective filtering to the light with the wave band of 500nm to1500nm.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nano cable composed of semimetal bismuth and metallic copper and method for synthesizing the same
InactiveCN101497424ADifficulties to overcomeHigh surface contactAnodisationNon-insulated conductorsSynthesis methodsEvaporation
The invention discloses a nano cable consisting of semimetallic bismuth and metallic copper and a synthesis method thereof. The nano cable consists of the semimetallic bismuth and the metallic copper, wherein the semimetallic bismuth or the metallic copper is a nano core thread of which the diameter is between 20 and 170 nanometers; and a shell which is formed by the semimetallic bismuth or the metallic copper is coated on the outside of the nano core thread, and the thickness of the shell is between 10 and 80 nanometers. The method comprises the following steps: firstly, using a secondary anode oxidation method to obtain a through hole alumina template; secondly, using an electronic beam evaporation method and an electrodeposition method successively to synthesize a nano cable which consists of a bismuth core thread and a copper shell or the nano cable which consists of a copper core thread and a bismuth shell respectively; and finally, placing the through hole alumina template of which a through hole is provided with the bismuth core thread and the copper shell or the copper core thread and the bismuth shell inside into a strong alkaline solution, eroding the alumina template, and preparing the nano cable which consists of the semimetallic bismuth and the metallic copper of the bismuth core thread and the copper shell or the copper core thread and the bismuth shell. The cable has potential application prospect; and the method can manually control the outside diameter of the nano cable, the diameter of the thread core and the thickness of the shell, and can be widely used to synthesize the nano cable by using two different materials.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Zinc oxide micro/nano composite structure array film and preparation method thereof
InactiveCN102167278AHigh surface areaHigh activityDecorative surface effectsIndividual molecule manipulationZinc oxide nanorodIon sputtering
The invention discloses a zinc oxide micro / nano composite structure array film and a preparation method thereof. In the film, an ordered hexagonal single-layer sphere array is arranged on a substrate; each sphere consists of a dielectric sphere, and a gold film and a zinc oxide nano-stick / cone coated in sequence on the outer surface of the dielectric sphere; the outer diameter of the dielectric sphere is 1-30 mum; the thickness of the gold film is 5-50 mum; the stick / cone axis of the zinc oxide nano-stick / cone is vertical to a sphere center; the length of the stick / cone is 200-800 nanometers; the diameter of the stick / cone is 80-160 nanometers; and the taper of the cone is 3-30 degrees. The method comprises the following steps of: performing ion sputtering and gold film deposition on the substrate with a single-layer crystal template at the pressure of 5-10 Pa to obtain a gold film sphere array; putting the gold film sphere array in zinc oxide electrolyte with the temperature of 60-80 DEG C; and performing electrolytic deposition at the deposition current density of between -0.3 mA / cm<2> and -2.0 mA / cm<2> by adopting a three-electrode method for 30 minutes to 4 hours to obtain the zinc oxide micro / nano composite structure array film. The film can be widely applied to the fields of photoelectronic devices, surface microfluids, sensors and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Preparation method of halogen-free flame retardant polyurethane-cage type silsesquioxane nanocomposite
The invention discloses a preparation method of a halogen-free flame retardant polyurethane-cage type silsesquioxane nanocomposite. The method comprises the following steps: first adding Diphenyl-methane-diisocyanate into a nano cage type silsesquioxane N,N-diphenyl methane diisocyanate solution, and stirring to obtain a modified cage type silsesquioxane solution; then drying the solution and grinding to obtain a modified cage type silsesquioxane powder; then mixing and stirring polyoxytertramethylene glycol, the modified silsesquioxane powder and N, N-diphenyl methane diisocyanate to obtain a mixed solution; and then dropwise adding Diphenyl-methane-diisocyanate into the mixed solution to obtain a modified mixed solution; then adding 1, 4-butanediol into the modified mixed solution for reaction to obtain a reaction liquid; and then placing the reaction liquid in a container, drying and curing at 50-60 DEG C for 10-20 h to prepare the halogen-free flame retardant polyurethane-cage type silsesquioxane nanocomposite. The composite material has excellent halogen-free flame retardant performance, and can be widely used in the fields of artificial leather and cable sheath.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Polyvinyl alcohol/inorganic nanometer oxide particle composite material and preparation method thereof
The invention discloses a polyvinyl alcohol / inorganic nanometer oxide particle composite material and a preparation method thereof. The material has a core-shell structure taking inorganic nanometer oxide particles as a core and polyvinyl alcohol as a shell, the core and the shell are connected by a chemical bond of M-O-C bond and a hydrogen bond, and the M in the M-O-C bond is Si or Al or Ti or Zn; and the method comprises that: firstly, the inorganic nanometer oxide particles are dispersed in low molecular alcohol or by a sol-gel method to prepare dispersoid or low molecular alcosol of the inorganic nanometer oxide particles; the dispersoid or low molecular alcosol is added with an initiator and vinyl acetate monomer for even mixing, and the mixture is subjected to polymerization reaction at a temperature of between 60 and 70 DEG C to prepare a polyvinyl acetate / inorganic nanometer oxide particle complex; and finally, the complex is added to alcoholic solution of alkali with the concentration between 0.1 and 1M for alcoholysis reaction at a temperature of between 25 and 45DEG C for 1 to 2 hours to prepare the polyvinyl alcohol / inorganic nanometer oxide particle composite material. The polyvinyl alcohol / inorganic nanometer oxide particle composite material can be used in the fields such as fibers, package materials, paper processing agents, binding agents, carrier materials, optical materials, film materials and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Wolfram-copper composite powder preparation method
InactiveCN103128310APreparation method scienceEfficient manufacturing methodNuclear fusionAmmonium paratungstate
The invention discloses a wolfram-copper composite powder preparation method. Water, copper nitrate, tartaric acid, ammonium paratungstate and citric acid are mixed according to the molar ratio of 440-460: 0.9-1.1: 2: 0.067-0.26: 1.620-6.264 and are stirred for at least five hours under the condition of 50 DEG C-60 DEG C, and mixed liquor is obtained. Polyethylene glycol is added into the mixed liquor. The polyethylene glycol and the mixed liquor are stirred to form gel under the condition of 60 DEG C-70 DEG C, wherein the molar ratio between the polyethylene glycol and the mixed liquor is 0.0022-0.0026: 0.9-1.1. After that, the gel is put under 100 DEG C-200 DEG C and is dried for at least twelve hours, and xerogel is obtained. The xerogel is put under 290 DEG C-310 DEG C for 3.5h-4.5 h, 540 DEG C-560 DEG C for 4.5h-5.5 h and intermediate products are obtained. Then, the intermediate products are put in reducing gas atmosphere and are reduced at least 3h, granular wolfram-copper composite powders are obtained, wherein the weight percentage of the wolfram and the copper is 70-90 wt% : 10-30 wt%. Grain sizes of the wolfram and the copper are 100nm-1Mum. The wolfram-copper composite powders can be used as nuclear fusion plasma facing materials.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Method for preparing tungsten trioxide nano material
InactiveCN102211789AGood dispersionEffective control of morphologyNanostructure manufactureTungsten oxides/hydroxidesDistilled waterTungsten trioxide
The invention discloses a method for preparing a tungsten trioxide nano material. The method comprises the following steps of: placing a metal tungsten plate in deionized water or distilled water with stirring, irradiating the metal tungsten plate by using laser with wavelength of 532nm or 1,064 nm, the pulse width of between 5 and 15ns, repetition frequency of 1 to 20Hz and single pulse energy of 50 to 120mJ for at least 10 minutes to obtain tungstic acid colloidal solution and then performing aging treatment on the tungstic acid colloidal solution for at least 24 hours or adding acid into the tungstic acid colloidal solution to adjust the pH value of the tungstic acid colloidal solution to be -0.6 to 3.0 to obtain yellow precipitates, or placing the metal tungsten plate in the acid solution with the pH value of -0.6 to 3.0 with stirring, and irradiating the metal tungsten plate by using the laser with the wavelength of 532nm or 1,064 nm, the pulse width of between 5 and 15ns, repetition frequency of 1 to 20Hz and single pulse energy of 50 to 120mJ to obtain the yellow precipitates, then centrifuging and washing the yellow precipitates to obtain the tungstic acid; and placing thetungstic acid at the temperature of 480 to 520 DEG C, and annealing for at least one hour to obtain the tungsten trioxide nano material. The appearance and the size of the product can be effectively adjusted and controlled in a large range.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nano chain composed by metallic nickel particles connected by copper oxide fimls and preparation method thereof
ActiveCN103111615AHigh specific surface areaExpand the field and scopeMaterial nanotechnologyMechanical sensorAnodic oxidation
The invention discloses a nano chain composed by metallic nickel particles connected by copper oxide films and a preparation method thereof. The nano chain is formed by the alternative connection of the metallic nickel particles and the copper oxide fims, wherein the diameter of each metallic nickel particle is 6 nm to 130 nm, the film length of each copper oxide film is 15 nm to 50 nm, the film width of each copper oxide is 30 nm to 50 nm and the film thickness of each copper oxide is 1 nm to 10 nm. The preparation method of the nano chain composed by the metallic nickel particles connected by the copper oxide films comprises the following steps: firstly, an aluminum sheet is processed through an anodic oxidation method so that a through-hole alumina template is obtained; a gold film is plated on one side of the through-hole alumina template in an evaporated mode and then the through-hole alumina template is used as a negative pole and placed in copper electrolyte and nickel electrolyte respectively for multiple alternative electrolytic depositions, so that the alumina template is obtained, wherein the through holes of the through-hole alumina template are placed with the copper cylinders and the nickel cylinders, the copper cylinders and the nickel cylinders are connected alternatively and one side of the alumina template is plated with the gold film; then the alumina template is soaked in aqueous alkali, so that a nano chain array which is formed by the alternative connection of copper oxide films and nickel particles is obtained; and finally the nano chain array is placed in ethylalcohol for ultrasonic dispersion, so that target production is obtained. The nano chain composed by the metallic nickel particles connected by the copper oxides and the preparation method thereof can be widely applied to magnetic recording, micro-mechanical sensors and biological medicine filed, such as the deliver of medicine, hyperthermia and magnetic separation.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Cobalt doped iron bismuth titanate multiferroic thin film material and preparation method thereof
InactiveCN103664161APreparation method scienceBroad application prospectsBismuth titanateSpintronics
The invention discloses a cobalt doped iron bismuth titanate multiferroic thin film material and a preparation method thereof. The material is a multiferroic thin film with a chemical formula of Bi6Fe2- xCoxTi3O18, the thickness of the thin film is not smaller than 400 nm, and the thin film is composed of densely arranged particles with particle sizes of 20-100 nm. The preparation method comprises the following steps: sequentially adding bismuth nitrate, ferric nitrate, cobalt acetate and n-butyl titanium in a mixed solution of acetic acid and acetylacetone to completely dissolve the components, stirring for at least 5 hours at room temperature to obtain a precursor solution, then, coating the precursor solution on a substrate, heating the substrate to obtain a substrate coated with a gel film, pyrolyzing the substrate coated with the gel film to obtain a substrate coated with a thin film, repeating the coating, after heating and pyrolyzing for multiple times, annealing the substrate coated with multiple layers of thin films, and separating the multiple layers of thin films with the substrate to obtain a target product. The cobalt doped iron bismuth titanate multiferroic thin film material has excellent residual magnetization intensity and polarization strength, thereby having a wide application prospect and great potential in spintronics and other fields.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Two-dimensional noble metal nanometer material and preparation method thereof
InactiveCN101565840BNo pollution in the processSimple processJewelleryPlatinumVolumetric Mass Density
The invention discloses a two-dimensional noble metal nanometer material and a preparation method thereof. The material comprises a substrate and a noble metal on the substrate; particularly, a gold film is covered on the substrate, vertical noble metal nanometer sheets are arranged on the substrate covered by the gold film and have the height of 0.5 microns to 1.5 microns, the width of 0.5 microns to 2.5 microns and the thickness of 15 nm to 25 nm, and the noble metal is metal gold, metal silver or metal platinum. The method comprises an electrodeposition method which comprises the followingsteps: firstly, depositing the gold film on the surface of the substrate; putting the substrate as a cathode into an electrolyte to electrolytically deposit for 3 hours to 7 hours under a current of 1to 50 microampere / cm<2>, wherein the electrolyte is prepared by an acid solution of the noble metal and polythene pyrrolidone according to the density of 1g / L:3 to 7g / L; and then, washing and dryingto prepare the two-dimensional noble metal nanometer material. The product can be widely applied to the fields of biomedicine, diagnosis, and the like. The preparation method needs raw materials having fewer types and low cost and being easy to get, has simple technological process and no environmental pollution and is easy to realize the industrialized production.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Electrostatic condenser based on nano electrodes and preparation method of electrostatic condenser
ActiveCN103219152AHigh specific capacitanceImprove breakdown voltageAnodisationMultiple fixed capacitorsCopper chlorideCarbon nanotube
The invention discloses an electrostatic condenser based on nano electrodes and a preparation method of the electrostatic condenser. The condenser comprises two groups of pore arrays which are inserted into each other in parallel, are not communicated with each other, are provided with openings towards different surfaces and are arranged in an anode aluminum oxide template, wherein carbon nano tubes electrically connected with conductive films covering the surfaces of the pore arrays are deposited in pores. The method comprises the following steps of: preparing a secondary aluminum oxide template in a secondary anode oxidation method, wherein one surface of the template is provided with a first pore array, and the back of the template is provided with gaps which are parallel to pores of the first pore array and formed in the circumference of an arc barrier layer formed by the pores of the first pore array; corroding the back of the secondary aluminum oxide template in an acidic copper chloride solution to obtain the anode aluminum oxide template on one surface of which the first pore array is arranged and on the back of which a second pore array is arranged; and depositing the carbon nano tubes in the pores of the first pore array and the second pore array by a chemical vapor deposition technology, and performing evaporation on the conductive films on the two surfaces of the anode aluminum oxide template, thus obtaining the target product. The electrostatic condenser can be widely applied to the field of energy storage and utilization.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Polyvinyl alcohol/inorganic nanometer oxide particle composite material and preparation method thereof
The invention discloses a polyvinyl alcohol / inorganic nanometer oxide particle composite material and a preparation method thereof. The material has a core-shell structure taking inorganic nanometer oxide particles as a core and polyvinyl alcohol as a shell, the core and the shell are connected by a chemical bond of M-O-C bond and a hydrogen bond, and the M in the M-O-C bond is Si or Al or Ti or Zn; and the method comprises that: firstly, the inorganic nanometer oxide particles are dispersed in low molecular alcohol or by a sol-gel method to prepare dispersoid or low molecular alcosol of the inorganic nanometer oxide particles; the dispersoid or low molecular alcosol is added with an initiator and vinyl acetate monomer for even mixing, and the mixture is subjected to polymerization reaction at a temperature of between 60 and 70 DEG C to prepare a polyvinyl acetate / inorganic nanometer oxide particle complex; and finally, the complex is added to alcoholic solution of alkali with the concentration between 0.1 and 1M for alcoholysis reaction at a temperature of between 25 and 45DEG C for 1 to 2 hours to prepare the polyvinyl alcohol / inorganic nanometer oxide particle composite material. The polyvinyl alcohol / inorganic nanometer oxide particle composite material can be used in the fields such as fibers, package materials, paper processing agents, binding agents, carrier materials, optical materials, film materials and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nano chain composed by metallic nickel particles connected by copper oxide fimls and preparation method thereof
ActiveCN103111615BLarge specific surface areaEasy to detectMaterial nanotechnologyElectrolytic agentCopper oxide
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Organic semiconductor thin film solar cell preparation method based on nickel oxide anode interface layer
InactiveCN103117361AIncreasing the thicknessQuality improvementFinal product manufactureSolid-state devicesChlorobenzeneElectrical battery
The invention discloses an organic semiconductor thin film solar cell preparation method based on a nickel oxide anode interface layer. The organic semiconductor thin film solar cell preparation method includes: placing nickel oxide block target materials and a transparent conductive substrate into a radio frequency magnetron sputtering device; sputtering in an argon atmosphere or an argon and oxygen mix atmosphere so as to obtain a transparent conductive substrate covered with nickel oxide film; then, mixing poly (3-hexylthiophene), [6,6]- phenyl-C61-methyl butyrate and chlorobenzene in an inert atmosphere, and stirring to obtain photosensitive coatings; coating the transparent conductive substrate covered with the nickel oxide film with the photosensitive coatings under the inert atmosphere; performing annealing treatment on the transparent conductive substrate so as to obtain a transparent conductive substrate covered with the nickel oxide film and photosensitive film in sequence; furthermore, using an electron beam evaporation method for lithium fluoride film and aluminum film evaporation on the surface of the transparent conductive substrate covered with the nickel oxide film and the photosensitive film in sequence; and finally, placing the transparent conductive substrate in the inert atmosphere to complete encapsulating and accordingly obtaining a target product. According to the organic semiconductor thin film solar cell preparation method based on the nickel oxide anode interface layer, production cost is low, and the nickel oxide film is large in area and good in quality.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Chitosan-finishing iron nanowire, method for producing same and application thereof
InactiveCN102650077AStop reunionPreparation method scienceIon-exchange process apparatusPolycrystalline material growthAnodic oxidationHexavalent chromium
The invention discloses a chitosan-finishing iron nanowire, a method for producing the same and an application thereof. The iron nanowire is externally finished with chitosan, is positioned in a pore of a porous alumina mouldboard, keeps a clearance of 1-5nm with a pore wall, grows along the (110) direction, and has the wire diameter of 50-55nm and the length of 380-420nm, and the porous alumina mouldboard has the pore diameter of 55-60nm, the pore length of 380-420nm and the pore density of 3.5 multiplied by 1014 / m<2>. The method comprises the steps that an anodic oxidation method is firstly used to obtain the porous alumina mouldboard; an electrolytic deposition method is used to treat the porous alumina mouldboard to obtain the porous alumina mouldboard with a pore in which an iron nanowire is arranged; then, the porous alumina mouldboard is firstly put into strong alkali solution to be etched for 2-5 minutes, so the porous alumina mouldboard in the state that the iron nanowire in the pore keeps the clearance with the pore wall is obtained; and the porous alumina mouldboard is then put in chitosan solution with the concentration of 0.05-0.15wt% to be soaked for 10-20 seconds, and then taken out and dried, so the chitosan-finishing iron nanowire is produced. The chitosan-finishing iron nanowire can be used as adsorbent, and is used in the solution which is polluted by hexavalent chromium for adsorption treatment.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Nano composite ethylene-propylene rubber cable material and its preparation method
ActiveCN102344610BGood dispersionImproved and stabilized flame retardancyPlastic/resin/waxes insulatorsInsulated cablesActive agentMining industry
The invention discloses a nano composite ethylene-propylene rubber cable material and its preparation method. The material is composed of ethylene-propylene-diene rubber, a nano compound, an organic modifier, inorganic metal hydroxide, an aging resister, a curing active agent and a peroxide according to 100:1-20:0.5-10:50-200:0.5-10:10-20:0.1-10, wherein, the nano compound is nano montmorillonite and nano calcium carbonate according to the weight ratio of 1:0.5-2, the organic modifier is a silane coupling agent or a titanic acid coupling agent or methacrylic acid or acrylic acid, the curing active agent is zinc oxide and stearic acid, the peroxide is dicumyl peroxide. The preparation method comprises the following steps: proportioning the raw materials according to the weight, successively adding the raw materials with the corresponding weight into an open mill or an internal mixer for mixing, placing on a plate vulcanizing machine for vulcanizing, producing the products with zero-halogen flame-retardant, age resistance and excellent mechanical property. The products is suitable for the occasions with requirement of zero-halogen flame-retardant, age resistance and frequent movement in the nuclear power plants, warships, mining industry and the like.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Micron semisphere composed of silver nano-flakes as well as preparation method and use thereof
InactiveCN102233433BQuick checkPreparation method sciencePolycrystalline material growthSingle crystal growth detailsSingle crystalSpectrometer
The invention discloses a micron semisphere composed of silver nano-flakes as well as a preparation method and a use thereof. The micron semisphere with the diameter of 1-30mu m is formed by stacking the silver nano-flakes adhered to a conducting substrate into a sector plate, wherein, the plane of the sector plate is vertical to the center of the semisphere; and the nano-flakes forming the sector plate are of a single crystal structure of silver, the length is 0.5-15mu m, the width is 20nm-1mu m and the thickness is 20-50nm. The preparation method comprises the following steps: firstly evenly mixing a silver nitrate aqueous solution with the concentration of 2-32g / L and a citric acid aqueous solution with the concentration of 8-144g / L based on the volume ratio of (0.8-1.2): (0.8-1.2) to obtain an electrolyte; and taking the conducting substrate as a cathode and a graphite flake as an anode to be placed in the electrolyte, and carrying out electro-deposition under constant current with the density of 0.1-1mA / cm<2> for 10-180 minutes to finally obtain the micron semisphere composed of the silver nano-flakes. The obtained micron semisphere can be utilized as a surface enhanced Ramanscattering (SERS) active substrate so as to measure content of rhodamine or polychlorinated biphenyls (PCBs) or p-methyl benzenethiol adhered thereon by utilizing a confocal Raman spectrometer.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Electrostatic capacitor based on nano-electrode and preparation method thereof
ActiveCN103219152BHigh specific capacitanceImprove breakdown voltageAnodisationMultiple fixed capacitorsElectricityCopper chloride
The invention discloses an electrostatic condenser based on nano electrodes and a preparation method of the electrostatic condenser. The condenser comprises two groups of pore arrays which are inserted into each other in parallel, are not communicated with each other, are provided with openings towards different surfaces and are arranged in an anode aluminum oxide template, wherein carbon nano tubes electrically connected with conductive films covering the surfaces of the pore arrays are deposited in pores. The method comprises the following steps of: preparing a secondary aluminum oxide template in a secondary anode oxidation method, wherein one surface of the template is provided with a first pore array, and the back of the template is provided with gaps which are parallel to pores of the first pore array and formed in the circumference of an arc barrier layer formed by the pores of the first pore array; corroding the back of the secondary aluminum oxide template in an acidic copper chloride solution to obtain the anode aluminum oxide template on one surface of which the first pore array is arranged and on the back of which a second pore array is arranged; and depositing the carbon nano tubes in the pores of the first pore array and the second pore array by a chemical vapor deposition technology, and performing evaporation on the conductive films on the two surfaces of the anode aluminum oxide template, thus obtaining the target product. The electrostatic condenser can be widely applied to the field of energy storage and utilization.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Preparation method of conductive polyethylene glycol terephthalate composite material
The invention discloses a preparation method of a conductive polyethylene glycol terephthalate composite material, comprising the following steps of: firstly sequentially mixing carbon nano tubes and phenylamine, stirring and ultrasonically homogenizing, then adding a co-stablizer to obtain a mixture, and then adding the mixture to an aqueous emulsifier solution, sequentially stirring and ultrasonically homogenizing to obtain a miniemulsion; then firstly adding an aqueous protonic acid solution to the miniemulsion, and then stirring to obtain a doped solution, then dripping an aqueous oxidant solution to the doped solution and reacting for at least 4 hours to obtain an intermediate product; then firstly carrying out centrifugalizing, washing and drying treatment on the intermediate product to obtain modified conductive carbon nano tube powder, and then melting and mixing the modified conductive carbon nano tube powder and polyethylene glycol terephthalate to prepare the conductive polyethylene glycol terephthalate composite material containing the polyethylene glycol terephthalate, polyaniline and the carbon nano tubes. The target product prepared by the method has good dispersity of the carbon nano tubes, high compatibility with a base body and wide conductivity regulating range.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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