71results about How to "Ease of large-scale synthesis" patented technology

The invention discloses a method of preparing a zinc oxide nanometer wire array, which belongs to the field of nanometer material preparation. The method comprises the following steps: using metallic zinc as an anode and an inert electrode as a cathode in an alkalescent electrolyte for anode oxidation; carrying out high-temperature annealing treatment of a zinc salt nanometer wire array obtained on the oxidated anode to prepare the zinc oxide nanometer wire array; and preferably, cleaning and / or carrying out electrochemical polishing treatment to the metallic zinc anode before the anode oxidation or adding a surface active agent to the electrolyte. The zinc oxide nanometer wire array prepared in the invention has the advantages of low-price material, environmental protection, simple equipment and steps, short preparation period and easy mass synthesis, and nanometer wire prepared by the method is formed by assembling zinc oxide nanometer crystals and has higher slenderness ratio, specific surface area and favorable electric performance.

The invention discloses a method for preparing titanium dioxide microspheres with adjustable particle sizes under an anhydrous solvothermal condition. The method comprises the following steps of dissolving titanium alkoxide in a solvent, adding a carboxylic acid to obtain a clear solution, transferring the solution into a solvothermal device for solvothermal reaction, and performing centrifugation and drying. The particle sizes of the titanium dioxide microspheres can be adjusted by changing compositions of the solvent in which the titanium alkoxide is dissolved. The method for preparing the titanium dioxide microspheres is implemented under an anhydrous condition, and is low in cost, simple equipment is required, a template is not required, the prepared titanium dioxide microspheres are easy to synthesize in a large scale, and have good crystallinity, and the particle sizes can be adjusted within a range of 200nm to 3mu m.

The invention discloses a supported catalyst capable of deeply degrading industrial dye waste water and a preparation method thereof, which belong to the technical field of a catalyst. The supported catalyst comprises the Fe and / or Mn-supported MCM-41 mesoporous molecular sieve catalyst, the preparation method comprises the following steps: carrier powder and a supported active component are subjected to dipping pretreatment; and then a one-step solvothermal method is used for preparing the metal supported catalyst. The preparation method has the advantages of simple process, high efficiency,high repeatability, and easy large-scale synthesis; synergism between duplex metals of Fe and Mn is used, the oxidation rate of methyl orange by ozone is greatly increased, the dye waste water methylorange can be efficiently and deeply degraded, and the method has good reusability.

The invention discloses a preparing method and application of a nickel matrix / nickel hydroxide composite electrode, and belongs to the technical field of electrochemical degradation of organic wastewater. The preparing method comprises the steps of firstly, putting a nickel matrix into a drying oven to be dried after the nickel matrix is cleaned, and then putting the dried nickel matrix into a reaction kettle; then adding a hydrogen peroxide solution into the reaction kettle, putting the reaction kettle into the drying oven for heat preservation, and cooling to the room temperature to take outa solid product in the reaction kettle; putting the solid product into the drying oven to be dried after the solid product is cleaned, and obtaining a nickel matrix / nickel hydroxide composite electrode material. The nickel matrix / nickel hydroxide composite electrode is applied to electrocatalysis-oxidative degradation of organic pollutants in water, is very low in energy consumption, has great advantages in the aspect of practical application, can be popularized to the field of electrochemical degradation of organic wastewater, and has a bright application prospect. It is put forward for thefirst time that the nickel matrix / nickel hydroxide composite electrode is applied to the field of electrochemical and oxidative degradation of the organic wastewater, and the aim of efficient and pollution-free treatment on the organic wastewater is achieved; the preparing method is easy to operate, efficient, high in repeatability and easy to synthesize on a large scale.

The invention provides a synthetic peptide vaccine for a foot-and-mouth disease, and particularly relates to a polypeptide for an O-type synthetic peptide vaccine for the foot-and-mouth disease, a polypeptide polymer of the polypeptide, a vaccine containing the polypeptide or the polypeptide polymer, and preparation methods of the polypeptide or the polypeptide polymer and the vaccine. The polypeptide has an amino acid sequence shown in SEQ ID NO.3. The candidate polypeptide antigens are screened by a lot of animal tests, the antigen site of the foot and mouth disease virus is optimized according to the screening result, and T cell epitope and B cell epitope are effectively combined, so that the immune effect of the polypeptide antigen is enhanced. The O-type synthetic peptide vaccine for the foot-and-mouth disease can be used for effectively processing antigenic variation of foot-and-mouth disease viruses, is good in biosecurity and easy to synthetize at a large scale and has good application prospect.

The invention relates to a preparation method and application of ternary layered transition metal chalcogenide. The ternary layered transition metal chalcogenide has uniform needles and granules on the surface, and the needle diameter and the granular size are 50-150 nm. The ternary layered transition metal chalcogenide is prepared from ammonium tetrathiomolybdate synthesized at room temperature as a precursor in combination with a transition metal compound according to the steps of stirring at room temperature, standing, separating, washing and drying. The prepared ternary layered transitionmetal chalcogenide has high-efficiency, stable and excellent recyclable practical performance in dye adsorption due to characteristics of granule dispersion and multiple gaps, and the maximum saturated adsorption capacity is 679.86 mg / g; and compared with other adsorbents, the ternary layered transition metal chalcogenide has great advantages; and secondly, the ternary layered transition metal chalcogenide has considerable prospects in electrocatalytic hydrogen production, photoelectric conversion, pollutant degradation and the like.

The invention relates to Pd / SnO2 nanospheres as well as a preparation method and an application thereof. The nanospheres have uniform sizes and good dispersity. The nanospheres are prepared with a one-step thermostatic water bath evaporation method, a clear solution is obtained by adding anhydrous SnCl2 to an HCl solution, then, chloropalladic acid solutions in different proportions are added, the nucleation and growth speeds of Sn and Pd are regulated by adjusting the water bath temperature, Pd / SnO2 nanosphere precipitates are prepared, then, products are subjected to centrifugal separation, washing and drying, and the Pd / SnO2 nanospheres in uniform size can be obtained. The preparation process has the advantages as follows: (1) no templates or dispersants are used in the reaction process, and the experiment process is simple and low in cost; (2) no precious metal reductants are used, posttreatment is not required, and no pollution is caused to the environment; (3) the reaction condition is mild, no high-temperature and high-pressure conditions are used, and mass synthesis is easy to realize; (4) the products have uniform forms and good dispersity. The obtained Pd / SnO2 nanospheres have good application prospects in catalysis, air-sensitivity, lithium batteries and other fields.

The invention relates to a preparation method of manganese cobalt oxide with a porous spherical hollow structure and an application thereof. The method is characterized in that manganese acetate and cobalt acetate are used as a manganese source and a cobalt source, ethylene glycol and methanol are used as organic solvents, the porous spherical hollow structure manganese cobalt oxide material having a uniform size is prepared in one step by an organic solvent combustion method, and Mn3O4 with a porous spherical core-shell structure, CoMn2O4 with a porous spherical shell structure, MnCo2O4 witha porous spherical hollow structure and Co3O4 with a uniform solid spherical structure are obtained by adjusting the ratio of manganese to cobalt. The method is advantaged in that the porous materialmanganese cobalt oxide has good catalytic performance for ORR OER, and the method has the characteristics of simple operation, low process cost and regular shape rules and has important significance for large-scale industrial production and practical application of the manganese cobalt oxide with the porous spherical structure.

The invention discloses a method of producing nickel microspheres. The method includes: dissolving nickel acetate in solvent, adding formic acid to obtain transparent solution, transferring the transparent solution to a solvent heater to allow for solvent thermal action, centrifuging obtained material, and drying to obtain nickel microspheres. The method has the advantages that the process is simple, the cost is low and post-treatment is not required; the method is easy for large-scale synthesis; the nickel microspheres produced by the method are well crystalline.

The invention provides a bird flu synthetic peptide vaccine and a preparation method thereof, in particular to polypeptide used for the bird flu synthetic peptide vaccine or a polymer thereof, as well as a vaccine containing the polypeptide or the polymer thereof and both preparation methods thereof, wherein an amino acid sequence of the polypeptide is an amino acid sequence showed as SEQ ID NO.1 or SEQ ID NO.2. The vaccine made from the polypeptide or the polymer thereof can effectively deal to antigenic variation of bird flu virus, has no biological safety problem, can be synthesized easily in large scale and has favorable application prospects.

The invention provides a synthetic peptide vaccine for a foot-and-mouth disease, and particularly relates to a polypeptide for an O-type synthetic peptide vaccine for a foot-and-mouth disease and a polypeptide polymer thereof, a vaccine containing the polypeptide or the polypeptide polymer thereof, and preparation methods thereof. The polypeptide comprises an amino acid sequence shown in SEQ ID NO.1, SEQ ID NO.2 or SEQ ID NO.3. The candidate polypeptide antigens are screened by a lot of animal tests, the antigen site of a foot and mouth disease virus is optimized according to the screening result, T cell epitope and B cell epitope are effectively combined, and the immune effect of the polypeptide antigen is enhanced. The antigenic variation of the foot-and-mouth virus can be effectively coped with by the O-type synthetic peptide vaccine for the foot-and-mouth disease, and the synthetic peptide vaccine is good in biosecurity, and easy to synthetize at a large scale, and has good application prospect.

The invention provides a bird flu synthetic peptide vaccine and a preparation method thereof, in particular to polypeptide used for the bird flu synthetic peptide vaccine or a polymer thereof, as well as a vaccine containing the polypeptide or the polymer thereof and both preparation methods thereof, wherein an amino acid sequence of the polypeptide is an amino acid sequence showed as SEQ ID NO.1or SEQ ID NO.2. The vaccine made from the polypeptide or the polymer thereof can effectively deal to antigenic variation of bird flu virus, has no biological safety problem, can be synthesized easilyin large scale and has favorable application prospects.

The invention discloses a hydroxyl nickel chloride nano material and a preparation method thereof, and belongs to the field of preparation of VIII group hydroxyl chloride nano materials. The hydroxyl nickel chloride nano material is a compound NiOHCl formed by nickel, hydroxyl and chlorine according to the stoichiometric number ratio of 1: 1: 1, the hydroxyl nickel chloride nano material has a nanosheet shape, and the nanosheet has a straight and regular surface. The preparation method comprises the following steps: taking nickel chloride hexahydrate crystalline powder and nickel hydroxide powder as raw materials, firstly, fully mixing and grinding the two raw materials for 30-60 minutes, then sealing and heating for 5-7 hours at the temperature of 130-170 DEG C, cooling to room temperature after the reaction is finished, and continuously grinding the product for 10-30 minutes to obtain the hydroxyl nickel chloride nano material. The method overcomes the defects in the previous preparation process, and is simple, low in cost and easy to control.

The invention discloses a porous carbon-loaded cobalt-based Fischer-Tropsch synthesis catalyst containing a silicon dioxide auxiliary agent and a preparation method thereof. The catalyst uses cobalt as an active component, silicon dioxide as the auxiliary agent and porous carbon as a carrier, and the mass percentages of cobalt and silicon dioxide are 25.8 to 30.6% and 6.2 to 21.0% respectively, with the balance being the porous carbon carrier. Metallic cobalt particles are uniformly distributed on the catalyst and densely arrayed; the diameters of the particles are in a range of 6 to 9 nm; and the silicon dioxide auxiliary agent exists on the surfaces of the particles. According to the invention, a CO-MOF-71 metal-organic framework is used as a sacrificial template, a silicon source is doped by using an impregnation method, and then the silicon dioxide-supported porous carbon-loaded cobalt-based catalyst is prepared on a fixed bed through one-step in-situ pyrolysis method. The catalyst prepared in the invention has high specific active site density; and when applied to Fischer-Tropsch synthesis, the catalyst has good C<5+> selectivity, especially high C<5+> space-time yield, on the basis of high activity.

The invention belongs to the technical field of lithium-sulfur batteries, and discloses a positive electrode material and a positive electrode with long cycle life for a lithium-sulfur battery as wellas preparation and application of the positive electrode. The positive electrode material for the lithium-sulfur battery is prepared by the following steps: (1) reacting thiourea with formaldehyde under the action of a catalyst by taking water as a reaction medium, and performing subsequent treatment to obtain a thiourea formaldehyde resin; (2) uniformly mixing ordinary sulfur powder with the thiourea formaldehyde resin, stirring at the temperature of 140 to 160 DEG C, continually raising the temperature to 170 to 190 DEG C, preserving heat for reacting, and performing subsequent treatment. The positive electrode is prepared by the following steps: uniformly mixing the positive electrode material, a conductive agent, a binder and an organic solvent to obtain slurry; coating a current collector with the slurry, drying and rolling to obtain the positive electrode. The positive electrode material and the positive electrode disclosed by the invention have long cycle life, higher specificcapacity and higher rate characteristic. The positive electrode is used for preparing the lithium-sulfur battery.

The invention discloses a preparation method and application of a nickel matrix / nickel hydroxide composite electrode, and belongs to the technical field of electrochemical degradation of organic wastewater. The preparation method firstly cleans the nickel substrate and puts it in an oven for drying, then puts it into a reaction kettle; then adds the hydrogen peroxide solution into the reaction kettle, puts it in the oven to keep warm, cools to room temperature, and takes out the solid product in the reaction kettle ; The solid product is cleaned and placed in an oven to dry to obtain a nickel matrix / nickel hydroxide composite electrode material; it is applied to the electrocatalytic oxidation degradation of organic pollutants in water, and the energy consumption is very low, which has great advantages in practical applications. And it can be extended to the field of electrochemical degradation of organic wastewater, and has a strong application prospect. The invention proposes for the first time that the nickel matrix / nickel hydroxide composite electrode is applied to the field of electrochemical oxidation degradation of organic wastewater to achieve the goal of efficient and pollution-free treatment of organic wastewater; the preparation method is simple, efficient, highly repeatable and easy to synthesize on a large scale.