53results about How to "The preparation process is easy to implement and flexible" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.