509results about How to "Small and uniform particle size" patented technology

The invention discloses a method and a system for recovering high-temperature sensible heat of molten blast furnace slag. The system comprises a blast furnace slag runner, a slag hopper, a slag hopper lifting mechanism, a quenching unit, a slow cooling unit, a cold slag particle circulation unit, a cyclone dust collector, a waste heat boiler, a condensing unit, a circulating fan, and a booster fan. The method for recovering waste heat comprises the following steps of: crushing and quickly cooling the molten blast furnace slag in the quenching unit in a composite way of a rotary crushing wheel, high-pressure cold air, a slag trap, cold slag particles and cooling water, and fully exchanging heat with solidified blast furnace slag in the slow cooling unit by using cooling air; and allowing high-temperature air which comes out of the quenching unit and the slow cooling unit to enter the waste heat boiler and performing heat exchange, transforming into steam or electric power and then outputting. The subsequent utilization of blast furnace slag and the waste heat recovery efficiency are synchronously considered, condensed water is recycled, finished slag does not contain water or only contains a small amount of water, the granulation effect of the slag is better, and the contradiction between intermittent slagging and continuous heat production of blast-furnace ironmaking is resolved.

The invention relates to cosmetic active ingredient-containing lipidosome as well as a preparation method and application thereof. The cosmetic active ingredient-containing lipidosome is small and uniform in particle size, so that the wrapped active ingredients can permeate the cuticles to the deep layer of skin so as to effectively realize deep skin care. Moreover, due to the small particle size, the collision and sedimentation probability of the finished lipidosome product is decreased and the stability of the lipidosome cosmetic is improved. The cosmetic active ingredient-containing lipidosome is prepared by a host-guest chemical method, so that the lipoid molecules and the active ingredient molecules are uniformly mixed on the molecular level, so that the gathering inactivation phenomenon of the active ingredients is avoided; the preparation condition is mild, so that the active ingredients are prevented from damage.

The invention discloses an in-situ synthesis method for a nano tin dioxide / carbon nano tube composite material, which mainly uses an inorganic tin salt, a carbon nano tube and an alkali source as raw materials. The experimental process mainly comprises the steps of precursor preparation, hydrothermal reaction, precipitate washing and drying and the like. The in-situ synthesis method for the nano tin dioxide / carbon nano tube composite material has the advantages that: a hydrothermal method is adopted to realize the in-situ deposition and the growth of the nano tin dioxide on the surface of the carbon nano tube; the obtained SnO2 nano particles have small and uniform particle size (less than 10nm), are well-crystallized, are uniformly coated on the surface of the carbon nano tube, and are tightly combined with the carbon nano tube; the composite material has potential application prospect in the aspects of a gas sensor material, an anode material of a lithium ion battery and the like. The method has no addition of any surface active agent, has simple and easily-obtained materials, simple process without pollution, short preparation period, mild reaction condition and low cost, and is suitable for large-scale production, so the method is an environment-friendly synthesis method.

The invention discloses a rich-lithium ternary laminar lithium ion battery cathode material, which has a molecular formula of Li<1+alpha> MnxNiyCozO2, wherein alpha is greater than 0.05 but smaller than 0.5, x is greater than 0.5 but smaller than 0.8, y is greater than 0.05 but smaller than 0.2, z is greater than 0.05 but smaller than 0.2, and the sum of x, y and z is 1. According to a method, a sol-gel method is adopted for preparing the cathode material. The method comprises the following preparation processes that metal salts of soluble manganese sources, nickel sources, cobalt sources and lithium sources are dissolved in water, then, acid complexing agents are added, ammonia water is used for regulating the pH value to be 6 to 8, next, the stirring is carried out at 60 to 90 DEG C, in addition, the water is dried through evaporation, sol-gel precursors are obtained, blocky porous loose precursors are obtained through vacuum drying, then, the ball milling, the pre-sintering, the sintering and the ball milling are carried out, and finally, the cathode material is obtained. The obtained material has the advantages that particles are more uniform and are in the nanometer level, in addition, a battery is assembled for carrying out electrochemical test, and higher capacity and excellent circulation performance are realized.

The invention discloses a biological activity glass meso-porous microsphere and a preparation method thereof. The biological activity glass meso-porous microsphere comprises the following chemical compositions in percentage by weight: 16 to 36 percent of CaO, 4 percent of P2O5 and 60 to 80 percent of SiO; the average grain diameter is between 2 and 5 mu m; the grains are sphere -shaped; the specific surface area of the grains is between 30.6m<2> / g and 89.7m<2> / g; and the meso-porous diameter is between 1.9 and 4.1nm. The method adopts the organic template method, comprising the following the steps that: a catalysts is added in deionized water, the mixed solution is added with tetraethoxysilane, triethyl phosphate and calcium nitrate tetrahydrate for hydrolysis reaction, the mixed solution is added with organic template polyethylene glycol and fully stirred to obtain sol, the sols is subject to aging to form wet gel, the wet gel is immersed in and washed by absolute ethyl alcohol and dried to obtain dry gel, and the dry gel is put in a crucible for heat treatment to obtain the finished products. The biological activity glass meso-porous microsphere has the advantages of higher biological activity and degradation property and good biological compatibility.

The invention discloses a transition metal composite oxide catalytic material and a microwave preparation method thereof, can output larger working voltage under higher current density, and has simple preparation method, easily controlled preparation process and rich raw material resources. The preparation method comprises the following steps: taking the nitrates of two transition metals according to the stoichiometric ratio of two metal elements, adding distilled water to prepare a solution, adding carbon black, stirring for reaction, and centrifuging to obtain the precipitate; washing the precipitate; drying at 50-80 DEG C and pulverizing to obtain a precursor, wherein the mass ratio of the transition metal composite oxide to the carbon black is 6:4, the A transition metal is one of Co, Mn, Fe and Ni, and the B transition metal is one of Co, Mn and Fe; and calcining the precursor by microwave to obtain the transition metal composite oxide catalytic material. The microwave calcining method of the invention has simple process and high efficiency, and the prepared spinel has a nano crystal form, small particle size and even distribution.

The invention discloses a coating method for improving electrochemical properties of a high-nickel ternary nickel cobalt manganese anode material. The coating method comprises the following steps: dissolving a titanium source into a solvent so as to obtain a solution, dissolving a lithium source, and further adding citric acid so as to obtain a mixed solution; uniformly dispersing a high-nickel ternary nickel cobalt manganese anode material into a solvent, adding the mixed solution, uniformly mixing, and performing a hydrothermal reaction or a solvent thermal reaction so as to obtain a reaction solution; evaporating the reaction solution to a gel state, and drying so as to obtain an anode material mixture; calcining the anode material mixture, thereby obtaining the high-nickel ternary nickel cobalt manganese anode material with a lithium titanate coating layer. The coating method for improving the electrochemical properties of the high-nickel ternary nickel cobalt manganese anode material, which is disclosed by the invention, is simple in process, low in cost and good in repeatability, the obtained coating layer is high in crystallization degree, small in particle size and good inuniformity, and the charge and discharge specific capacity, the circulation property and the multiplying power of the high-nickel ternary nickel cobalt manganese anode material can be improved.

A preparation method of up-conversion phosphor nanometer particles belongs to the technical field of materials and comprises the following steps: (1) dissolving rare-earth inorganic acid salt powder by ethanol to obtain rare-earth inorganic acid salt ethanol solution; (2) adding long-chain fatty acid, performing the reflux reaction under the mixing condition, and preparing a long-chain fatty acid precursor of rare-earth; (3) adding one of an erbium precursor, a thulium precursor and a holmium precursor as well as a yttrium precursor and a ytterbium precursor into a water-ethanol mixing system, adding and uniformly mixing sodium fluoride and surface active agent, and heating and reacting for 2-24h under the obturating condition; (4) adding organic solvent after lowering the temperature, centrifugalizing, and drying or naturally withering after washing white precipitate. The preparation method has simpler process, easy synthesis condition, good repetitiveness, low cost and higher productive rate.

The invention discloses transparent nanometer zirconium dioxide liquid phase dispersoid, and a preparation method and application thereof. The dispersoid comprises liquid phase media and nanometer zirconium dioxide particles, wherein the nanometer zirconium dioxide particles are uniformly dispersed into liquid phase media; the solid content of the dispersoid is 1 weight percent to 50 weight percent; the one-dimensional dimension of the nanometer zirconium dioxide particles is 1 to 12nm; the liquid phase media are water, organic solvents, a mixture of water-soluble organic solvents and water, or a mixture of different organic solvents. The nanometer zirconium dioxide in the product has high crystallinity degree; the particle diameter is small; the distribution is uniform; any surfactant is not contained; the purity is high; the dispersion effect is good; no sedimentation occurs after the still standing for 6 months or longer. The product prepared by the method does not need any treatment, and is directly the transparent nanometer zirconium dioxide liquid phase dispersoid; any substance does not need to be added for dispersion assistance; the problems of easy agglomeration, poor dispersibility and poor optical performance of the composite material are solved; higher application performance and wider application ranges are given to the product.

A nano-class conversion fluorescent material used for biomolecular fluorescent marker is prepared through dissolving yttrium (or lanthanum or gadolinium) oxide in acid to obtain solution A, adding aminocarboxylic comple, adding it to the solution of fluoride, centrifugal treating, drying to obtain precursor, and high-temp calcining. Its advantages are 37-166 nm of granularity, low calcining temp and strong fluorescence.

The invention discloses an extruded puffed fiber food and a preparation method thereof and belongs to the technical field of food processing. The extruded puffed fiber food comprises the following components in parts by weight: 10-50 parts of wheat flour, 15-50 parts of fiber flour, 0.2-5 parts of salt, 0.2-10 parts of calcium carbonates, 0.1-30 parts of conjugated linoleic acid, 0.1-5 parts of konjac fine flour, 0-80 parts of buckwheat powder, 0-80 parts of oat meal, 0-80 parts of tartary buckwheat flour, 0-80 parts of dehydrated potato powder, 0-80 parts of corn starch, 0-80 parts of rice meal, and 0-10 parts of seasonings. The food disclosed by the invention is prepared from fiber flour through the following steps: mixing the fiber flour with other components, humidifying the obtained mixture, then carrying out extrusion puffing on the humidified mixture, seasoning the obtained product, and baking the seasoned product. The food disclosed by the invention can be used for solving theproblem that a food with a high fiber content is rough in taste and difficult to digest after being eaten; and simultaneously because an appropriate amount of the conjugated linoleic acid is added, the conjugated linoleic acid and the fiber in the invention can enable the food to achieve an effect of weight loss and fat removal and an effect of improving the extrusion puffing characteristics and taste of the fiber food.

The invention relates to a multifunctional polyethylene glycol-dual vitamin E succinate derivative and application thereof in drug delivery. An amphiphilic block copolymer utilizes polyethylene glycol as a hydrophyllic end to be combined with bimolecular hydrophobic vitamin E succinate under bridging of lysine, so that the AB2 type two-arm amphiphilic block copolymer is obtained. The polymer has potential antineoplastic activity and P-gp inhibitory action, and is capable of synergetically and effectively overcoming multidrug resistance to increase chemotherapeutic effect. Besides, the block copolymer can be self-assembled to form a micelle in aqueous medium, and can serve as a reservoir of poorly water-soluble drug, protein and gene-based drug, and the micelle is safe and high in stability and encapsulation, can be used for intravenous injection and oral ingestion, and has bright market application prospects.

The invention belongs to the technical field of medicine, and designs and synthesizes a series of disulfide bond-containing micromolecular prodrugs in which carbon chains in different lengths are linked (sulfur atoms in the disulfide bond are respectively located alpha, beta and gamma sites of an ester bond). PTX (Paclitaxel)-CIT (Citronellol) is used as a sample, and a synthesis method is simpleand easy. On the basis, a micromolecular prodrug self-assembly nano-drug delivery system is prepared. The preparation method is simple and convenient, the stability is high, and efficient encapsulation and delivery of drugs are realized. The invention discovers that the disulfide bond has redox dual sensitivity, can be fractured under the action of high-expression ROS (Reactive Oxygen Species) andGSH (Glutathione) of tumor cells, and PTX can be released; particularly, redox dual hypersensitivity is shown by PTX-CIT prodrugs (alpha-PTX-SS-CIT), which are located in the alpha site of a carbonylgroup, of the disulfide bond, the alpha-PTX-SS-CIT prodrugs can be quickly fractured to release the PTX and take effects, an anti-tumor effect of the PTX is remarkably improved, and a wide development prospect is obtained.

The invention relates to a stratified flow simulation test water channel system which includes a reservoir, a submersible pump, a flowmeter, a valve switch, a water channel, a hydraulic jack, a position regulator in the water channel, a position-adjustable water inlet, a grid net, a pulling gate, a digital temperature chain and a sampling tube, a backwater sand punching pipe, a multi-channel recorder outside the water channel, a pump-absorption water sample acquisition case, a drain aperture elevation adjusting device and a position-adjustable water outlet. The water channel system has a simple structure and is easy to operate. The system can simulate a moving process of a stratified flow at the beginning of an inflow stage, and can also simulate the moving process of a stratified flow under the release of a valve flow, a stratified flow having the water inlets at different depths, a stratified flow having different bottom slop coarse degrees, and a stratified flow caused by different shapes and different factors. The system, through addressing the problem of singularity in stratified flow simulation types in traditional stratified flow tests, successfully achieves tests of different stratified flow simulation types, and increases reliability and accuracy of density flow analysis and research.

The invention discloses a heavy metal biological adsorbent using an eggshell membrane as a matrix and a preparation method thereof. The heavy metal biological adsorbent adopts chitosan as an immobilized carrier and eggshell membrane powder as a basis material, and comprises the following components in part by weight: 10 to 13 parts of the eggshell membrane powder, 20 to 30 parts of the chitosan of which the deacetylation degree is 86.9 percent, and a minute amount of gelatinous substance of a complex which contains sodium and potassium and is formed in the preparation process. The particle size of the biological adsorbent is 2 to 3 millimeters. The method comprises the steps of performing vacuum freeze drying and mechanical disintegration on a fresh eggshell membrane (a fibrous membrane between an eggshell and egg white), and then embedding the eggshell membrane with chitosan glue solution to obtain the biological adsorbent for adsorbing heavy metals. The biological adsorbent can be used for treating waste water containing the heavy metals of nickel, cobalt, cadmium, copper, lead and the like of which the concentration is lower than 100 mg / L, and the adsorption rate achieves 42 to 98 percent.

The invention discloses a high-voltage lithium ion battery cathode material of copper-doped lithium manganate. The high-voltage lithium ion battery cathode material is characterized in that the general formula is LiMn2-xCuxO4, wherein x is more than or equal to 0.1 and less than or equal to 0.5. The modified cathode material is prepared by adopting a sol-gel method, and the preparation method comprises the following steps of: dissolving a soluble lithium salt, a soluble manganese salt and a soluble copper salt in deionized water to prepare a mixed solution; mixing with an acidic complexing agent solution to react, controlling the reaction temperature to be between 60 and 90 DEG C, and adjusting the pH value to be 6 to 8 by using ammonia water; continuously stirring and drying by evaporation; after drying, pre-burning the obtained gel precursor for 1 to 10 hours at 400 to 500 DEG C; and calcining the gel precursor for 8 to 16 hours at 600 to 900 DEG C to obtain a final product. The high-voltage lithium ion battery cathode material of copper-doped lithium manganate is uniform in grain diameter and stable in structure, the technical process is simple, the production cost is low, and a prepared lithium ion secondary battery has high charge-discharge cycle performance.

The invention provides a method of preparing a carbon nano pipe load hydrous ruthenium oxide composite material. First, an electric deposition solution is prepared, and then the carbon nano pipes are spread in the main solution; the ruthenium hydroxide is deposited and loaded on the carbon nano pipes through the electric deposition method, to form the precursor of the carbon nano pipe load hydrous ruthenium oxide composite material; the carbon nano pipes / ruthenium hydroxide settling after the electric deposition are put into a drying box to receive heat treatment, and after natural cooling, the carbon nano pipe load hydrous ruthenium oxide nano powder composite material is obtained. The invention has simple preparing conditions, easy to realize, does not include the complicated technology of re-oxidation treatment after traditional deposition of ruthenium trichloride and alkalinesubstance, so as to prevent introduction of impurity ion, make sure of high purity of products, prevent deficiencies of low output and difficulty in realizng industrialization, can prepare a large amount of carbon nano pipe / hydrous ruthenium oxide compound powder, and helps in industrial large-scale production.

The invention discloses a nano zinc oxide-doped powder and a preparation method thereof. Silicon-aluminum co-doped nano zinc oxide powder is synthesized by using a co-precipitation and calcining one-step method; and the mol ratio of aluminum as a doping element to zinc oxide and the mol ratio of silicon as a doping element to the zinc oxide are (0.03:1)-(0.18:1) respectively. The nano zinc oxide-doped powder disclosed by the invention has the advantages that the whiteness of nano zinc oxide and the light transmittance in a visible light band are improved; the photocatalytic activity of the nano zinc oxide, the dissolving of zinc ions and the particle size increase of the zinc oxide particles in the roasting process are inhibited; and the dispersibility of the nano zinc oxide in water is improved; and the preparation method has the advantages of convenience in operation, simple requirement on equipment, short process flow, low cost and suitability for large-scale industrial production.

The invention relates to a sulfur tolerant catalyst suitable for slurry bed methanation. The catalyst adopts the main metal W as an active component, and on the basis the assistant metal W1 is added as an auxiliary agent, and the catalyst carrier is M. The catalyst is composed of, by mass: 2-40% of W, 0.5-35% of W1, and 50-97.5% of the carrier M. The sulfur tolerant catalyst provided in the invention has the advantages of high catalytic activity, long service life and high selectivity.

The invention belongs to the technical fields of chemical organic synthetic materials and chemical process, and relates to an expoxy resin polyamine curing agent and a waterborne epoxy curing agent emulsion. The expoxy resin polyamine curing agent with hydrophilic epoxy resin is obtained by modifying polyamine; the expoxy resin polyamine curing agent is prepared into the curing agent emulsion through a reverse inversion method, wherein. According to the invention, an expoxy resin chain segment is introduced to the curing agent emulsion, so that the curing agent emulsion has good compatibility with an expoxy emulsion, thus the solidification uniformity curing is promoted, a solidifying cured membrane is uniform and compact, and the comprehensive mechanical property of the solidifying cured membrane is improved.

The invention discloses a process for preparing nano titanium dioxide with homogeneous grain sizes, which comprises using titanium tetrachloride, hydrogen and air as raw materials, premixing by a predetermined volumetric ratio, loading into various rings of the premixing combustion reactor for hydrolyzing reaction, growing in flocculator with hot water jacket, finally gathering with a bag filter and carrying out deacidification.

The invention provides an organic silicon acrylic acid modified waterborne epoxy emulsion and a preparation method thereof. The core layer consists of low-grade bisphenol A epoxy resin, reactive diluent, epoxy silane, a reactive emulsifier, an initiator, an assistant and an acrylic acid monomer; the shell consists of vinyl siliane, an acrylic acid monomer, a reactive emulsifier, an assistant, an initiator and de-ionized water. The obtained organic silicon acrylic acid modified waterborne epoxy emulsion is small and even in particle size and excellent in stability, is excellent in mechanical strength, environment-friendly and energy-saving after being formed to be films. The dry film matched with modified amine curing agent via the modified waterborne epoxy emulsion can reach the level of close to the film property of solvent-type epoxy resin.

The invention relates to a grain deep-processing product, in particular to quinoa powder, and belongs to the technical field of grain processing.The quinoa powder is reasonable in nutrient composition, good in solubility, high in digestion and absorption rate and wide in applicable people.The preparation method of the quinoa powder comprises the steps of raw material selecting, cleaning, slurrying, enzymolysis, partial fermentation, blending and mixing and spray drying; the enzymolysis process adopts cellulase, alpha-amylase, beta-amylase and alpha-1,4-glucose hydrolase for composite enzymolysis, multiple modes of combining ultrasonic cleaning, microwave assisted ultrasonic extraction and hot water extraction are adopted, the raw material utilization ratio and nutrient content are effectively increased, and the quality is effectively improved; the food safety of the product is effectively guaranteed.The quinoa powder obtained through the method is good in instant solubility, the quinoa powder is a milk white emulsion which is uniform and stable in appearance after being dissolved, has the wheat fragrance peculiar to cereals and is smooth and refreshing in mouthfeel and free of sticky feeling, fragrance is left in lips and teeth after the quinoa powder is swallowed, sour regurgitation does not occur in oral cavities, the quality is good, and the quinoa powder is clean, sanitary, convenient to carry and wide in application.

A process for preparing TiO2 nanoparticles by solid-solid transform method includes such steps as adding the hydrochloric acid solution of Ti source to the aqueous solution of alkaline substance, regulating pH=7-8 to generate white Ti(OH)4 deposit, filtering, washing, adding organic acid, stirring to obtain precursor, and calcining in air at 550-650 deg.C for 0.5-1.5 hr to obtain anatase-type TiO2 nanoparticles or at 750-850 deg.C for 0.5-2.5 hr to obtain rutile-type TiO2 nanoparticles.

The invention belongs to the field of new auxiliary materials and new dosage forms of medicine preparations and relates to a chemotherapeutic drug-photosensitizer co-assembled nanoparticles and construction thereof. A chemotherapeutic drug is an anthracycline chemotherapeutic drug selected from mitoxantrone, doxorubicin or epirubicin; a photosensitizer is a porphyrin photosensitizer selected fromchlorine e6, hematoporphyrin monomethyl ether or a chlorophyll derivative, wherein the molar ratio of the chemotherapeutic drug to the photosensitizer is 3:1-1:3. A certain quantity of the chemotherapeutic drug and the photosensitizer or a mixture of the chemotherapeutic drug, the photosensitizer and PEG is dissolved in a proper quantity of organic solvent, and the solution is slowly dropwise added to water while stirring to form uniform nanoparticles spontaneously. The preparation process is simple, enlarged production is easy, particle size is small and uniform, and the nanoparticles can beenriched at tumor parts through a reinforced permeation retention effect; the nanoparticles have ultrahigh drug loading capacity and can reduce related toxicity of auxiliary materials; and surface modification is easy, and the circulation time of the nanoparticles in blood can be prolonged by PEG modification.

The ferroferric oxide nano magnetic fluid prepared with the method has the particle size of 8-17 nm. The ferroferric oxide particles modified by trisodium citrate have negative electricity on the surfaces, and the Zeta potential measurement shows that the potential on the surfaces of the ferroferric oxide particles is -8.6 mV to -23.9 mV. The ferroferric oxide particles modified by nitric acid have positive electricity on the surface, and the Zeta potential measurement shows that the potential on the surfaces of the ferroferric oxide particles is +6.7 mV to +18.5 mV. Compared with the prior art, because the invention adopts lower synthesis temperature, and the nitrogen protection prevent the oxidation of divalent iron salt, the prepared magnetic particles have small and even size and electricity on surfaces, can disperse stably for a long time without agglomerating and are super paramagnetic particles which can move directionally under the condition that the magnetic field exists. The method for preparing the improved ferroferric oxide magnetic fluid comprises the following steps: adjusting the pH value of solution containing trivalent iron salt and bivalent iron salt solution to 9-10 with aqueous ammonia under the nitrogen protection, stirring the aqueous ammonia to the solution to make the aqueous ammonia react with the solution at 70-100 DEG C for 1-4h, washing the product of reaction with ethanol and deionized water repeatedly until the pH value of the product of reaction being neutral, dispersing the prepared nano magnetic ferroferric oxide in the trisodium citrate solution or the nitric acid solution, and washing the product of reaction with acetone and deionized water repeatedly to obtain the ferroferric oxide nano magnetic fluid with negative electricity or positive electricity.

The invention discloses a preparation method for a catalyst for producing methyl methacrylate. The preparation method comprises the following steps: fully mixing a gold precursor with a reducing agentand deionized water under stirring by adopting a a macromolecular protection method, so as to obtain stable and uniformly single gold sol in a higher dispersion state; sequentially adding a lanthanide metal and a transition metal in the presence of a macromolecular protection agent, then adding a carrier, continuously stirring for 2 to 20 hours, slowly heating the mixture to 65 to 85 DEG C, cooling the product to room temperature after the stirring is ended, leaving to stand for filtration, washing the product with the deionized water till no chloride ions are detected, drying the product, and calcining the product in air to obtain the catalyst. The catalyst has outstanding performance in the reaction for producing the methyl methacrylate. According to the preparation method, the gold carrying amount is low; the preparation process is simple and easy to operate; the catalyst is excellent in activity, extremely high in stability and low in cost; the methylacrolein conversion rate and the MMA (methyl methacrylate) selectivity are high; the preparation method is suitable for industrial production.

The invention discloses a method for preparing nano nickel oxide from nickeliferous waste materials, and belongs to the technical field of nickeliferous waste material recycling. The method comprises the steps that powder nickeliferous waste materials are leached through sulfuric acid, a tartaric acid solution is added to a nickeliferous sulfuric acid solution to serve as a screening agent, ammonia water is added, the solution is always kept clear, acetic acid is slowly added to enable pH of the solution to be controlled to range from 3 to 6, and the solution is heated to 50-65 DEG C; a dimethylglyoxime ethanol solution is added, an enough amount of ammonia water is added to make pH of the solution be 10, filtering and washing are conducted after standing is conducted, nickel dimethylglyoxime is obtained and calcined through a muffle furnace, and the nano nickel oxide is obtained. The nano nickel oxide prepared through the method has the advantages of being small and uniform in particle size and the like, the heat preservation time in the calcining process is short, and the advantages of being complete in particle and high in crystallinity are guaranteed.

The invention relates to a preparation method of nano-graphite carbon powder. The method comprises the steps of: (1) preparing expansible graphite by a chemical oxidation intercalation process; (2) preparing expanded graphite by a microwave process; (3) pressing the expanded graphite into a expanded graphite sheet, putting it into a microporous filter membrane sieving assembly, conducting pressing and sealing, then placing the assembly at the anode and cathode of an electrolytic bath, taking a chlorate solution as an electrolyte solution, carrying out ultrasonic electrolysis at a temperature below 60DEG C, controlling the electrolytic current at 5-18A / cm<2>, the voltage at 6-20V, the ultrasonic oscillation power at 200-600W, and the frequency at 20-40kHz, inverting the anode and the cathode at an interval of 8-15min, completing electrolysis when the concentration of sol in the electrolytic bath is 2-5%, thus obtaining nano-graphite carbon sol; and (4) adding ammonium sulphate into the nano-graphite carbon sol till the mass concentration of ammonium sulfate reaches 5-8%, stirring them uniformly, then performing freeze drying, thus obtaining the nano-graphite carbon powder. The method has the advantages of mild reaction condition and high speed, thus being suitable for industrialized mass production.