263 results about "Sodium molybdate" patented technology

The invention discloses a carbon-doped titanium dioxide nanotube-molybdenum disulfide energy-storage antibacterial material and a preparation method thereof. The preparation method comprises the following steps: carrying out primary anodic oxidation on a clean titanium foil in a mixed electrolyte of ethylene glycol, water and ammonium fluoride; after ultrasonic treatment is carried out in a hydrochloric acid solution for set time, secondary anodic oxidation is carried out, and the mixed electrolyte of the secondary anodic oxidation is the same as that of the primary anodic oxidation; annealing the titanium foil subjected to anodic oxidation twice in an argon atmosphere, putting an annealed sample into a mixed solution of sodium molybdate, a sulfur source and glucose, and carrying out hydrothermal treatment; and the titanium foil subjected to hydro-thermal treatment is cleaned and dried, and the carbon-doped titanium dioxide titanium foil with the surface covered with molybdenum disulfide is obtained. The MoS2-coated carbon-doped titanium dioxide nanotube (TNT-C-atMoS2) with high biocompatibility developed by the invention has a synergistic effect of charge antibiosis and chemical sterilization, so that the problem of intractable biological fouling of a titanium-based metal material in ocean engineering equipment is effectively solved.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention discloses a fermentation medium for regulating and controlling a clostridium aerovorans target product and a fermentation method of the clostridium aerovorans target product. The medium comprises a basic component and a regulating component, the basic components comprise ammonium chloride, potassium chloride, magnesium sulfate heptahydrate, sodium chloride, monopotassium phosphate, yeast powder, calcium chloride dihydrate, sodium selenite, nickel chloride hexahydrate, biotin, folic acid, pyridoxine hydrochloride, thiamine, riboflavin, nicotinic acid, D-calcium pantothenate, cobalamin, para aminobenzoic acid and lipoic acid; the adjusting component comprises sodium tungstate, ferrous sulfate and sodium molybdate, sodium tungstate and ferrous sulfate have a forward adjusting effect on increasing the yield of acetic acid, ethanol and butanol in the target product, and sodium molybdate has a reverse adjusting effect on the target product. By optimizing the proportion of trace elements in the culture medium, the clostridium metabolism efficiency is improved, synthesis of a target product is regulated and controlled, and the method is particularly suitable for industrial production of acetic acid, ethanol, butanol and the like.

The invention discloses an application of a molybdenum disulfide-based piezoelectric catalytic material in a seawater uranium extraction material, and relates to the technical field of seawater uranium extraction, thiourea and sodium molybdate are used as precursors, and a MoS2 nanoflower with a specific 1T / 2H composite crystal structure is constructed through a hydrothermal synthesis technology. The method is placed in a uranyl nitrate solution, ultrasonic treatment is combined, efficient extraction of uranium can be achieved, and the method has potential application to extraction of uranium from seawater. The method is simple in process and environment-friendly, almost does not generate harmful waste in the synthesis process, does not need complex operation, and has good amplification preparation potential.

The invention discloses a high-dispersion graphene conductive adhesive solution for a battery and a preparation method of the high-dispersion graphene conductive adhesive solution, and belongs to the technical field of conductive adhesive solutions. The high-dispersion graphene conductive adhesive solution for the battery prepared by the invention is prepared from the following raw material components in parts by mass: 6 to 8 parts of high-dispersion graphene, 4.5 to 13.5 parts of an adhesive and 60 to 90 parts of a solvent, the preparation method comprises the following steps: ultrasonically dispersing graphene in a mixed solution of hexadecyl triyl ammonium bromide and deionized water, sequentially adding hexadecyl triyl ammonium bromide, sodium molybdate dehydrate, bismuth nitrate pentahydrate and cerium nitrate hexahydrate, uniformly stirring and dispersing, performing hydrothermal reaction, washing, drying, grinding and sieving to obtain the high-dispersion graphene. The adhesive is prepared from an amphiphilic polyethylene glycol-polycaprolactone block copolymer and amphiphilic polyacrylate.

The invention discloses a three-dimensional multi-interface heterostructure lithium-sulfur battery interlayer, a preparation method thereof and a lithium-sulfur battery, and the preparation method comprises the following steps: placing acidified carbon cloth in a mixed solution of cobalt nitrate, nickel nitrate and hexamethylenetetramine for primary hydrothermal reaction to prepare NiCo2O4 (at) CC; the NiCo2O4 (at) CC is placed in a mixed solution of nickel chloride and sodium molybdate, a secondary hydrothermal reaction is carried out, and NiMoO4 (at) NiCo2O4 (at) CC is obtained; according to the preparation method, NiMoO4-coated NiCo2O4-coated CC is subjected to thermal reduction annealing in a mixed atmosphere of hydrogen and argon, the three-dimensional multi-interface heterostructure lithium-sulfur battery interlayer is prepared, active sites of the three-dimensional heterostructure are increased, the oxidation-reduction reaction efficiency under high sulfur loading capacity is improved, the nano-particle anchored amorphous nanosheets form the multi-interface heterostructure, and the performance of the lithium-sulfur battery is improved. Good chemical adsorptivity and catalytic conversion on polysulfide in the battery are realized, and the cycle life of the battery is prolonged.

The invention discloses an anti-sulfate-attack preparation method of solid waste concrete, and relates to the technical field of building materials and civil engineering, the anti-sulfate-attack solid waste concrete is prepared from the following materials in parts by weight: 100 parts of cement, 30-50 parts of composite solid waste cementing material, fly ash, steel slag micro powder and coal gangue according to a given mass ratio, 60-80 parts of modified recycled aggregate; 0.05-0.1 wt% of sodium molybdate as an erosion inhibitor. According to the invention, solid waste activation-interface reconstruction-ion competition-structure self-healing is taken as a core, synchronous spanning of solid waste concrete in the dimensions of sulfate erosion resistance, resource consumption, construction convenience and the like is realized through multi-process collaboration, and the gelation potential of solid wastes such as fly ash and steel slag is accurately excited through microwave targeted activation, so that the construction efficiency is improved. And a dense microstructure is reconstructed by combining a nano-SiO2 induced crystallization technology, so that excellent mechanical properties are still ensured when the solid waste mixing amount exceeds 70%.

According to the low-temperature plasma activated water preparation system, the preparation method and the application, a direct-current voltage-driven air jet plasma generation device which is small and convenient and does not need a complex gas circuit is utilized in the preparation system, and air is adopted as working gas to treat an aqueous solution; an aqueous solution rich in active oxygen, active nitrogen and other active ingredients is efficiently generated, and the active ingredients have high oxidation-reduction potential and can effectively degrade PhSMe. The concentration of active particles in PAW is improved by optimizing the discharge voltage, the discharge time and the concentration of the sodium molybdate solution, so that the degradation effect of PhSMe is improved. An auxiliary agent sodium molybdate is introduced in the degradation process, and the degradation effect is two times higher than the pure PAW treatment effect.

The application provides a weathering steel surface rust layer stabilizing treatment agent for industrial atmospheric environment, and the chemical composition of the weathering steel surface rust layer stabilizing treatment agent is as follows in terms of mass fraction: 25-45% of acrylic resin, 2.0-6.0% of chromium sulfate, 3.0-8.0% of ferrous oxide, 2.0-6.0% of ferric oxide, 0.5-3.5% of copper sulfate, 0.3-1.5% of sodium bisulfite, 1.0-6.0% of sodium molybdate, 0.5-3.5% of nickel sulfate, 2.0-5.0% of potassium phosphate, 0.05-0.5% of surfactant, 0.05-0.5% of defoaming agent, 0.05-0.5% of dispersing agent, 0.05-0.5% of thickening agent, and the balance is water, wherein the amount of plasticizer added is 2-5% of the resin. The stabilizing treatment agent in the application can promote the weathering steel surface to form a stable and dense rust layer within 0.5-1 year after the surface of the weathering steel is treated before use.

The invention relates to an electroplated coating protective agent and a preparation method thereof, and belongs to the technical field of electroplated coating protective agents, and the protective agent comprises the following raw materials: main salt, auxiliary salt, a composite complexing agent, 1-docosanethiol, a sealing agent, absolute ethyl alcohol and deionized water. The succinic acid, the N-sodium lauroyl sarcosinate and the citrazinic acid are used as the composite complexing agent, and starting from different aspects of activating the surface of the coating, accelerating the growth of the protective film layer and increasing the compactness of the protective film layer, the prepared protective agent can effectively improve the corrosion resistance effect of the coating; and the added 1-docosanethiol is used for reducing the defect area of the protective film layer and further effectively improving the corrosion resistance of the protective film. Besides, chromic nitrate is used as a main salt, cerous sulfate and sodium molybdate are used as auxiliary salts, and sodium silicate is used as a sealing agent, so that the prepared protective agent can effectively have remarkable salt spray resistance, and meanwhile, the appearance quality of a formed film layer can also be improved.

The invention belongs to the technical field of metal material plating, and particularly relates to a connector surface composite coating and a preparation process thereof, and the preparation process comprises the following steps: adding modified carbon black and sodium molybdate into deionized water, stirring to obtain a corrosion inhibition material, and mixing with modified zinc oxide to obtain a mixed filler; the preparation method comprises the following steps: adding dibutyltin dilaurate and toluene diisocynate into polypropylene glycol to obtain a core material; adding hexadecyl trimethyl ammonium bromide and the mixed filler into a 93-96 wt% ethanol solution, adding the core material for emulsification, adding an isophorone diisocyanate solution, and stirring to obtain a microcapsule; nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, boric acid, a surface dispersant, a sodium hydroxide solution and microcapsules are added into deionized water to be mixed, and an electroplating solution is obtained; and putting the connector into the electroplating solution for electroplating to obtain the composite coating. The expansion of pitting corrosion can be inhibited, and the long-term use reliability and stability of the connector in a marine environment are improved.

The preparation process comprises the following steps: connecting an aluminum alloy with an anode of a micro-arc oxidation alternating current power supply, and immersing the aluminum alloy in an electrolytic solution in a stainless steel electrolytic bath; the stainless steel electrolytic bath is connected with a cathode of the micro-arc oxidation alternating current power supply; the surface of the aluminum alloy is subjected to micro-arc oxidation treatment, and an Al2O3 / MoS2 / CePO4 composite ceramic film layer is constructed on the surface of the aluminum alloy in situ; wherein the electrolytic solution comprises a solvent, which is deionized water; the solute comprises the following components in parts by mass in each liter of solvent: 15 parts of sodium hexametaphosphate, 10 parts of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 5 parts of sodium molybdate, 10 parts of sodium sulfide and 5-12.5 parts of cerium acetate. According to the preparation process of the high-wear-resistance and high-corrosion-resistance micro-arc oxidation composite film layer, the high-wear-resistance and high-corrosion-resistance composite ceramic film layer is constructed on the surface of the aluminum alloy in situ, and the wear resistance and the corrosion resistance of the surface of the aluminum alloy are improved.

The invention relates to an additive for improving refrigeration efficiency of liquid water and a production process thereof, and belongs to the technical field of water additives. The additive comprises 70-80 parts by weight of a carrier, 3-6 parts by weight of modified sophorolipid, 1-2 parts by weight of sodium polyacrylate and 0.5-1.5 parts by weight of sodium molybdate, the carrier is of a core-shell structure, the core of the carrier is nano-copper, and the shell of the carrier is hydrophilic mesoporous silica doped with carboxylated carbon nanotubes; according to the additive prepared by the invention, the refrigeration efficiency of water is improved through the interaction among the carrier, the surfactant and liquid water.

The invention provides a preparation method of a Mo-doped FeSe2 electrode material and application of the Mo-doped FeSe2 electrode material as a sodium-ion battery anode, and the preparation method comprises the following steps: mixing FeCl3. 6H2O, terephthalic acid and N, N-dimethylformamide, loading into a reaction kettle, and heating at high temperature to obtain an MIL-88B metal organic framework precursor; and then dispersing the MIL-88B precursor, sodium molybdate, selenium powder and hydrazine hydrate in a solvent, and doping Mo atoms into a FeSe2 electrode material through hydrothermal synthesis to obtain the Mo-FeSe2 sodium ion battery anode. According to the preparation method, Mo atoms are doped into FeSe2, so that the strength of Fe-Se bonds is enhanced, the structure collapse effect of the electrode material is effectively relieved from the structure level, an SEI film on an electrode liquid interface is compact and uniform, and the multiplying power and the cycle service life of the electrode material are effectively improved.

The invention relates to a scale inhibitor for an industrial circulating water system and an intelligent adding method thereof, and belongs to the technical field of industrial water treatment.The scale inhibitor is composed of a component A and a component B. The component A comprises, by mass, 5-15% of sodium molybdate, 5-15% of sodium tungstate, 15-25% of sodium polyacrylate, 5-15% of sodium borate, 15-25% of zinc sulfate, 5-10% of zinc chloride, 3-8% of sodium silicate and 2-6% of benzotriazole; the component B is prepared from the following components in percentage by mass: 15 to 25 percent of HEDP, 15 to 25 percent of PBTC, 35 to 50 percent of AA / AMPS copolymer and 15 to 25 percent of deionized water. According to the scale inhibitor for the industrial circulating water system and the intelligent adding method of the scale inhibitor, a phosphorus-free and chromium-free environment-friendly formula with sodium molybdate and sodium tungstate as cores is adopted, and phosphorus pollution and heavy metal risks are fundamentally eradicated; according to the formula, through cooperation of multiple components, a layer of compact and stable composite passivation film with self-repairing capacity can be formed on the metal surface in severe water with high chloride ions, and the corrosion inhibition rate gt of carbon steel is achieved; the copper corrosion inhibition rate is gt; and 98%.

The invention discloses a molybdenum disulfide nanosheet / nitrogen-doped bamboo-like carbon fiber tube / sulfur composite material and a preparation method thereof, a lithium-sulfur battery positive electrode and a lithium-sulfur battery, the preparation method comprises the following steps: mixing melamine and aluminum, under the protection of inert gas, reacting for 0.5-4 hours at a high temperature of 900-1500 DEG C, soaking the obtained reactant in an inorganic acid solution for 2-24 hours, and drying to obtain the molybdenum disulfide nanosheet / nitrogen-doped bamboo-like carbon fiber tube / sulfur composite material. Then dispersing the nitrogen-doped bamboo-like carbon fiber tube material, thioacetamide, sodium molybdate and urea into a solvent, carrying out solvothermal reaction, calcining the obtained reactant in a reducing atmosphere, and finally carrying out sulphitation; the composite material is characterized in that the surface of a hollow bamboo-like nitrogen-doped bamboo-like carbon fiber tube is coated with a flaky molybdenum disulfide nanosheet, sulfur is loaded on the flaky molybdenum disulfide nanosheet, the composite material is used as an active material to prepare a lithium-sulfur battery positive electrode, and then a lithium-sulfur battery is assembled. The lithium-sulfur battery has relatively good cycling stability and rate capability.

The invention discloses a lignin-based composite condensation water pipeline corrosion inhibition agent as well as a preparation method and application thereof. The lignin-based composite condensation water pipeline corrosion inhibition agent is prepared from the following raw materials: alkali lignin, a formaldehyde solution, an amine monomer, sodium molybdate and ethanolamine ascorbic acid. The preparation method comprises the following steps: dissolving alkali lignin in a solvent, adding a formaldehyde solution, sufficiently and uniformly mixing, slowly dropwise adding an amine monomer, carrying out Mannich reaction on the alkali lignin and the amine monomer at a certain temperature to obtain aminated lignin, and then cooling; after cooling is completed, sodium molybdate, ethanolamine and ascorbic acid are added into a system, continuous stirring is conducted, an obtained reaction solution is dried, and the lignin-based composite condensation water pipeline corrosion inhibition agent is prepared. The lignin-based composite corrosion inhibition agent for the condensed water pipeline is applied to be added into the condensed water pipeline to regulate and control the quality of condensed water, and a passive film is generated on the inner wall of the condensed water pipeline, so that the corrosion prevention of the condensed water pipeline is realized.

The invention relates to the technical field of metal surface treatment, in particular to a high-salt-spray-corrosion-resistance workpiece surface phosphating treatment method. The method comprises the following working procedures of ultrasonic oil removal, water washing, water washing, activation, dipping phosphorization, water washing, water washing, ultrasonic hot water washing and drying, and dipping phosphorization refers to that an activated workpiece is put into a phosphating solution to be subjected to phosphating treatment; the phosphating solution comprises the following components: 5-8 g / L of organic phosphonic acid, 30-40 g / L of zinc dihydrogen phosphate, 50-55 g / L of calcium nitrate, 2-4 g / L of sodium m-nitrobenzenesulfonate, 1-2 g / L of an accelerant, 0.5-0.8 g / L of a surfactant, 1-3 g / L of sodium molybdate, 2-4 g / L of citric acid and 0.2-0.44 g / L of rare earth salt. Through low-temperature high-efficiency process design and multi-component collaborative innovation, breakthrough is achieved in the aspects of compactness, corrosion resistance, adhesive force and other core performance of the phosphating film, the environment friendliness and economical efficiency are both achieved, and a new solution is provided for metal corrosion prevention in the fields of automobiles, ships, electronics and the like.

The invention belongs to the technical field of coating protection, and particularly relates to a preparation method of a single-component high-temperature fast curing silver-aluminum polymer coating applied to the surface of a coating layer. Comprising 175-180 parts of modified epoxy resin; 95 to 100 parts of flaky aluminum silver powder; 180-200 parts of a mixed solvent of dimethylbenzene and / n-butyl alcohol; 100 to 120 parts of dicyandiamide; 25 to 40 parts of 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea; 10 to 12 parts of sodium molybdate; 4-8 parts of graphite; 1 to 2 parts of polydimethylsiloxane; 2 to 6 parts of a wetting agent HY-352; 3-5 parts of fumed silica; 0.5 to 3 parts of dimethyl silicone oil; and 0.2-2 parts of a hydroxymethyl cellulose agent. The coating disclosed by the invention has the advantages of thin coating, high-temperature rapid curing, relatively good corrosion resistance, good combination with a coating layer and the like, and also has excellent storage stability.

The invention relates to a preparation method of a polyacid modified CuMoSelectrode material, and belongs to the technical field of new energy materials and photoelectric conversion. According to the preparation method, an in-situ synthesis method is adopted, and SiW11Co is doped in a CuMoS material through a one-step solvothermal preparation technology; comprising the following steps: S1, dissolving sodium molybdate and thioacetamide in ethylene glycol, then adding SiW11Co into the solution for dissolving, finally adding Cu2O, and carrying out ultrasonic treatment on the mixed solution at room temperature for 10-15 minutes to obtain a uniform dark brown suspension; s2, continuously stirring for 5 minutes, transferring the precursor suspension into a high-pressure reaction kettle, and carrying out a solvothermal process for 22-24 hours; s3, the reaction kettle is cooled to the room temperature, a final product is centrifugally washed three times with deionized water and absolute ethyl alcohol respectively, then vacuum drying is conducted, and the SiW11Co / Cu2MoS4 composite material is obtained. By introducing a proper amount of SiW11Co, a rough structure is formed on the surface of CuMoS, the number of active sites is increased, the specific surface area is increased, and the catalytic performance and the stability are far better than those of a traditional CuS counter electrode and an unmodified CuMoS counter electrode.

The invention relates to a high-temperature-resistant anti-discoloration water-based copper protective agent, a using method and a copper workpiece, the copper protective agent is composed of 30%-65.5% of film forming matter, 0.1%-3% of solution stabilizer, 0.1%-1% of thickening agent, 0.1%-1% of flatting agent, 0.1%-1% of wetting agent and 30%-69% of deionized water, the film forming matter comprises lithium silicate aqueous solution, sodium silicate and sodium phosphate, and the solution stabilizer comprises sodium silicate and sodium phosphate. The stabilizer comprises a phosphoric acid aqueous solution and a boric acid aqueous solution, the thickening agent comprises sodium polyacrylate, the flatting agent is a polyether modified polysiloxane flatting agent, the wetting agent is a modified organic silicon wetting agent, and the corrosion inhibitor comprises sodium molybdate. When in use, a compact transparent protective layer is formed on the copper surface through the processes of copper piece pretreatment (sulfuric acid-hydrochloric acid-nitric acid polishing solution polishing treatment), protective agent dipping, centrifugal spin-drying and drying. Compared with the prior art, the protective layer enables the copper workpiece to be colorless and transparent after being treated at 250 DEG C for 6 hours, has no obvious color change, has excellent high-temperature-resistant and anti-discoloration performance, and is high in solid content and low in transportation cost.

This application relates to a method for preparing multi-acid modified Cu₂MoS₄ electrode materials, belonging to the field of new energy materials and photoelectric conversion technology. An in-situ synthesis method is employed, using a one-step solvothermal preparation technique to dope Cu₂MoS₄ materials with SiW. 11 Co; includes the following steps: S1. Dissolve sodium molybdate and thioacetamide in ethylene glycol, and then add SiW to the solution. 11 Co is dissolved, and finally Cu2O is added. The above mixed solution is ultrasonically treated at room temperature for 10-15 min to obtain a uniform dark brown suspension. S2. After stirring for another 5 min, the precursor suspension is transferred to a high-pressure reactor for a solvothermal process of 22-24 h. S3. The reactor is cooled to room temperature, and the final product is washed three times each with deionized water and anhydrous ethanol by centrifugation, and then vacuum dried to obtain SiW. 11 Co / Cu2MoS4 composite material. This invention utilizes an appropriate amount of SiW... 11 The introduction of Co creates a rough structure on the surface of Cu₂MoS₄, increasing the number of active sites and the specific surface area. This results in catalytic performance and stability that are far superior to those of traditional Cu₂S counter electrodes and unmodified Cu₂MoS₄ counter electrodes.

The invention discloses a nutrient element combined application combination for improving yield and quality of pinellia ternate and an application method. The nutrient element combined application combination comprises urea, calcium superphosphate, potassium sulfate, EDTA chelated copper, disodium octaborate tetrahydrate and sodium molybdate. The application method comprises the following steps: applying nitrogenous fertilizer and phosphatic fertilizer during sowing in April, applying nitrogenous fertilizer, phosphatic fertilizer, potash fertilizer, copper fertilizer, boric fertilizer and molybdenum fertilizer from June to July, and applying potash fertilizer, copper fertilizer, boric fertilizer and molybdenum fertilizer in August; according to the method, orthogonal experimental design is adopted, the nutrient element combined application combination most suitable for pinellia ternata production is obtained, the application method of the combined application combination designed by the invention is simple, convenient and easy to control, the yield of pinellia ternata can reach a relatively high level, the yield is 14619.42 kg: hm <-2 >, and the difference (P is less than 0.5) between the yield and the highest yield (14901.40 kg. Hm <-2 >) of the element combined application combination is not obvious.

This invention relates to the field of materials preparation technology, specifically disclosing a method for preparing tungsten-molybdenum alloy powder based on a coprecipitation precursor. The method involves mixing sodium tungstate, sodium molybdate, and water to prepare a tungsten-molybdenum mixed solution; mixing the tungsten-molybdenum mixed solution with a precipitant solution containing zinc or cadmium salts, and allowing the tungsten and molybdenum to coprecipitate under stirring; filtering and washing the reaction slurry to obtain a wet precipitate of tungsten-molybdate coprecipitate, with the filtrate serving as the mother liquor; drying and grinding the wet precipitate of tungsten-molybdate coprecipitate to obtain tungsten-molybdate coprecipitate powder; and reducing the tungsten-molybdate coprecipitate powder in a hydrogen stream at 700-1000°C to obtain tungsten-molybdenum alloy powder and zinc or cadmium vapor. This invention combines the reduction and alloying reactions into one, with a reaction temperature below 1000°C, shortening the tungsten-molybdenum alloy powder preparation process and significantly saving energy and reducing consumption.

The invention discloses a preparation method of a rare earth doped Bi2MoO6 / In2O3 heterojunction composite photocatalyst, and belongs to the technical field of photocatalytic materials, and the preparation method specifically comprises the following steps: S1, preparing a precursor; step S2, preparation of a solid-liquid mixture: putting bismuth salt, rare earth metal salt, hexadecyl trimethyl ammonium bromide and sodium molybdate into deionized water, performing ultrasonic dispersion, adding the precursor In2O3, and performing ultrasonic stirring and uniform mixing to obtain the solid-liquid mixture; and S3, carrying out a hydrothermal reaction on the solid-liquid mixture, naturally cooling, centrifuging, carrying out solid-liquid separation, washing the solid with deionized water, and drying to obtain the rare earth doped Bi2MoO6 / In2O3 heterojunction composite photocatalyst. According to the invention, rare earth doping (especially yttrium Y doping) is introduced, so that the light absorption capacity of the material is further enhanced, efficient migration and compounding inhibition of photo-induced electrons and holes are realized, regulation and control of the energy band structure and light absorption performance of the material are realized, the utilization rate of visible light is further enhanced, and finally, the photocatalytic activity is remarkably improved.

The invention discloses a preparation method of bio-based trans, trans-muconic acid. Comprising the following steps: mixing a raw material containing galactose diacid with a catalyst, and reacting to obtain a product containing trans, trans-muconic acid; the catalyst is selected from at least one of ammonium paramolybdate, ammonium orthomolybdate, potassium heptamolybdate, sodium molybdate, sodium molybdate and molybdic acid. Compared with a traditional method for synthesizing trans, trans-muconic acid, the method provided by the invention has the advantages of simple steps, low cost and high conversion rate selectivity. Compared with traditional fossil energy-based raw materials, the reaction raw materials are derived from biomass, and the sustainable development view and the dual-carbon concept are met.

The invention belongs to the field of pharmaceutical preparations, and relates to a multi-trace element injection and a preparation method thereof. The multi-trace element injection comprises effective components, a stabilizer and water, the effective components comprise chromium chloride, copper chloride, ferric chloride, manganese chloride, sodium molybdate, sodium selenite, zinc chloride, potassium iodide and sodium fluoride, and the stabilizer comprises xylitol, a pH regulator and an additive; and the additive is PEG (Polyethylene Glycol) 400 or PEG 600. The multi-trace element injection provided by the invention can effectively inhibit the loss of iodine in the sterilization process, and the stability, economical efficiency and production controllability of the multi-trace element injection are fundamentally improved.

The application discloses a preparation method of a hydrocracking catalyst, and comprises the following steps: (1) a mixed solution and an alkaline precipitant are dropwise added into a solution containing a Ni component in parallel flow to perform a coprecipitation reaction, and slurry M is obtained; wherein the mixed solution is a mixed solution of sodium tungstate, sodium molybdate and sodium metaaluminate; (2) the slurry M is divided into two parts, i.e., slurry M-1 and slurry M-2, and the two parts are separately subjected to aging, and the two aging products are mixed to obtain slurry N; (3) the slurry N is subjected to vacuum filtration, and the obtained filter cake is subjected to two times of health maintenance; (4) the filter cake is subjected to drying treatment, and then is mixed and kneaded with a molecular sieve and a molding aid, and then is subjected to extrusion and molding to obtain a molded product, and the molded product is subjected to calcination treatment to obtain the hydrocracking catalyst. The hydrocracking catalyst with a bimodal pore structure is obtained through aging and gelation by means of pH value swing in batches, the problem that small molecule aromatic hydrocarbons are at a disadvantage in competitive adsorption and reaction processes is solved, the aromatic hydrocarbon removal efficiency is improved, and the hydrocracking catalyst is suitable for a hydrocracking process for producing industrial 5# white oil.

The present application belongs to the technical field of tire manufacturing, and particularly relates to an antiskid tire and a preparation method thereof. The antiskid performance of the tire is significantly improved by adding cerium-doped polyoxometalate-based layered compounds and nitrogen-sulfur co-modified zirconium-based MXene layered compounds in the tread compound. The cerium-doped polyoxometalate-based layered compounds are prepared by hydrothermal reaction and calcination treatment using disodium hydrogen phosphate, sodium molybdate, cerium nitrate and hexanediamine as raw materials. The nitrogen-sulfur co-modified zirconium-based MXene layered compounds are prepared by etching, peeling and co-calcination with thiourea after synthesizing ceramics using titanium powder, aluminum powder, zirconium powder and carbon powder as raw materials. When preparing the tire, the rubber is first mixed with carbon black, the two modified compounds and the additives to obtain a masterbatch, then the vulcanization system components are added to obtain a final rubber compound, and finally the finished product is obtained through extrusion, lamination and vulcanization molding. The antiskid tire prepared by the present application has excellent grip on wet and icy road surfaces.

This invention relates to a method for preparing sodium trimolybdate ammonium monohydrate, characterized in that: (1) ammonium molybdate is dissolved in pure water, and the mass-to-volume ratio of ammonium molybdate to water is controlled at (1-15):50, and stirred evenly; then saturated sodium chloride solution is added to the solution, and the volume ratio of saturated sodium chloride solution to water is controlled at 1:2-5:1; after stirring evenly, 5~95 o C. Let stand for 4-12 days to obtain white flocculent matter; (2) Gently remove the white flocculent matter with a key or glass rod, and wash it by suction filtration or centrifugation. Since sodium trimolybdate monohydrate is water-soluble, it should be washed in small amounts and multiple times; (3) Dry and grind the washed white flocculent matter to obtain sodium trimolybdate monohydrate. Advantages of the present invention: The content of sodium trimolybdate monohydrate obtained is 92-98%, and the yield is 95-99%. The adsorption rate of sodium trimolybdate monohydrate on wastewater containing basic fuchsin and methylene blue is as high as 80% or more.