159 results about "Sodium molybdate" patented technology

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 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 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.

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.

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 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.

The invention discloses an Eu / Mo co-doped Mn2O3 (at) Na2Mn8O16 (at) MnCO3 composite material and a preparation method thereof, and belongs to the field of inorganic materials. The preparation method comprises the following steps: adding europium nitrate hexahydrate, a manganese nitrate solution, urea and sodium molybdate into purified water for dissolving, and carrying out constant-temperature reaction in a hydrothermal reaction kettle; after the reaction is finished, filtering, putting a precursor into a drying oven, drying, re-dispersing the precursor into deionized water, adding urea and manganese sulfate monohydrate, uniformly dispersing, performing hydrothermal reaction again, cooling to room temperature, washing precipitate with water, calcining in a muffle furnace, and cooling to obtain the Eu / Mo co-doped Mn2O3 (at) Na2Mn8O16 (at) MnCO3 composite material. According to the preparation method, the electrochemical performance of the composite material is improved through two-step hydrothermal treatment, cubic and conjoined sphere shapes with burrs are observed microcosmically, and the structure endows the material with an interconnected conductive network, a roughened high-activity surface and a more stable overall structure.

The invention discloses a composite coated wave-absorbing material and a preparation method thereof. The composite coated wave-absorbing material comprises an iron-silicon-chromium powder matrix and a composite coating layer, the composite coating layer is of a gradient structure and sequentially comprises an insulating aluminum oxide layer, a high-temperature-resistant and alkali-resistant zirconium oxide layer and a flaky molybdenum disulfide layer from inside to outside. The method comprises the following steps: dispersing an original Fe-Si-Cr powder matrix, and depositing a precursor material step by step to obtain the Fe-Si-Cr magnetic powder after surface treatment, and sintering the iron-silicon-chromium magnetic powder subjected to surface treatment in stages, uniformly dispersing the sintered iron-silicon-chromium magnetic powder, sodium molybdate and thiourea, and carrying out hydrothermal reaction to obtain the composite coated wave-absorbing material with an inner aluminum oxide-zirconium oxide composite layer and an outer molybdenum disulfide nanosheet coated layer. The wave-absorbing performance, the salt spray resistance, the volume resistivity, the high temperature resistance and the voltage resistance of the wave-absorbing material are improved.

The invention belongs to the technical field of metal explosive welding, and particularly relates to a corrosion-resistant hastelloy-steel composite plate and a preparation method thereof.The corrosion-resistant hastelloy-steel composite plate structurally comprises a carbon steel base layer, a nickel-based composite transition layer and a hastelloy layer which are sequentially arranged from bottom to top; the contact surface of the carbon steel base layer and the nickel-based composite transition layer is subjected to laser micro-etching treatment; the nickel-based composite transition layer is composed of a nickel-chromium alloy matrix and a corrosion inhibitor nanocapsule; the corrosion inhibitor nanocapsule is prepared by loading a compound corrosion inhibitor of sodium molybdate and benzotriazole on a mesoporous silica carrier; the corrosion-resistant hastelloy-steel composite plate structure is manufactured through an explosive welding process. The nickel-based composite transition layer containing the mesoporous silica loaded compound corrosion inhibitor nanocapsule is arranged on the carbon steel base layer subjected to laser micro-etching treatment, and then the nickel-based composite transition layer and the hastelloy layer are subjected to explosive welding, so that the binding force is improved; and stable transition and interface corrosion inhibition of the carbon steel base layer and the hastelloy layer are achieved through the nickel-based composite transition layer, and the corrosion resistance of the composite board is improved.

The application relates to the technical field of copper foil and discloses an electrolytic copper foil and a roughening treatment method thereof. The roughening treatment method of the electrolytic copper foil comprises the following steps: S1, adding an organic-inorganic composite additive into a prepared base roughening solution to prepare a roughening solution, wherein the organic-inorganic composite additive comprises sodium molybdate, sodium tungstate and hydroxyethyl cellulose, the concentration of the sodium molybdate is 30-50 mg / L, the concentration of the sodium tungstate is 20-40 mg / L, and the concentration of the hydroxyethyl cellulose is 6-10 mg / L; and S2, performing cathode electrolytic roughening treatment on a pretreated copper foil by using the roughening solution to obtain the electrolytic copper foil. Through the above mode, the problem that a roughening layer is difficult to synchronously realize the comprehensive performance target of 'low roughness, high peeling strength and uniform compactness' can be solved.

The invention discloses a cobalt molybdenum oxide catalyst, a preparation method thereof and a method for preparing propylene by catalyzing oxidative dehydrogenation of propane. The invention aims to provide a preparation method of a cobalt-molybdenum oxide catalyst, and the cobalt-molybdenum oxide catalyst has relatively high selectivity for catalyzing oxidative dehydrogenation of propane to prepare propylene under a low-temperature condition. The technical scheme is as follows: (1) preparing a cobalt nitrate hexahydrate aqueous solution; (2) adding sodium molybdate dihydrate into the cobalt nitrate hexahydrate aqueous solution, and stirring for 30 minutes at normal temperature; (3) slowly dropwise adding the mixed solution to AlOOH powder drop by drop and stirring; (4) putting the mixed paste into a ball milling tank for ball milling for 4 hours; (5) centrifugally drying to obtain a solid product; and (6) calcining the solid product at 500 DEG C for 4 hours to obtain a finished product. Belongs to the technical field of thermocatalytic materials and environmental protection.

The application discloses a preparation method of a photocatalytic material Bi / Bi2MoO6 / BiOBr for indoor formaldehyde degradation, which comprises the following steps: dissolving bismuth nitrate and sodium molybdate in ethylene glycol respectively to prepare bismuth nitrate solution and sodium molybdate solution; adding the sodium molybdate solution into the bismuth nitrate solution drop by drop to prepare a mixed solution, adding ethanol and BiOBr, stirring and ultrasonicating, transferring into a high-pressure reaction kettle, heating to 160 DEG C and keeping for 12 hours, drying the product to obtain Bi2MoO6 / BiOBr; dissolving the Bi2MoO6 / BiOBr in water and ultrasonicating, adding a sodium borohydride solution and stirring, washing with water and centrifuging, and drying the product to obtain Bi / Bi2MoO6 / BiOBr. The application provides a preparation method of the photocatalytic material Bi / Bi2MoO6 / BiOBr, which adopts a simple hydrothermal method and a sodium borohydride reduction method, and the ternary photocatalyst formed has excellent degradation effect on gaseous formaldehyde.

The invention belongs to the technical field of metal surface treatment materials, and particularly relates to an environment-friendly phosphorus-free high-adhesion silane ceramic film forming agent and application thereof. The potassium fluozirconate is subjected to electrochemical reaction on the metal surface to form skeleton particles and provide a basic physical barrier and corrosion resistance, the molybdate promotes metal oxidation and film formation, and the silane coupling agent provides a three-dimensional network structure and has a synergistic effect with the potassium fluozirconate and the sodium molybdate, so that the corrosion resistance and the adhesive force of the formed ceramic film can be effectively improved, and the corrosion resistance and the adhesive force of the ceramic film are improved. And fluotitanic acid is hydrolyzed to form an inorganic network structure, metal surface micropores are covered, passivation film growth is accelerated, phosphonobutane tricarboxylic acid and polyacrylic acid are added to form an organic-inorganic hybrid film, inorganic film microcracks are filled, the flexibility and adhesive force of the ceramic film are improved, and the service life of the ceramic film is prolonged. The film-forming agent is relatively simple in vitrification process for the metal surface, washing-free treatment can be selected after vitrification, only the PH value needs to be controlled in tank liquor control, and the film-forming agent can be suitable for various metal materials.

The invention discloses a method for improving the binding force of an electrolytic copper foil and a base material under low roughness and the electrolytic copper foil. The method comprises the following steps: 1) carrying out smooth acid pickling on a 9-35 [mu] m raw foil; (2) performing picosecond laser selective ablation on bulges of more than 100nm on the surface of the pickled raw foil to enable Ra to be less than or equal to 0.1 mu m; (3) depositing a compact copper layer of 0.1-0.4 mu m to fill the micro pits; 4) coarsening in a coarsening solution containing copper ions, sulfuric acid, sodium tungstate and sodium molybdate; 5) curing in a curing liquid containing copper ions, sulfuric acid, MPS, HEC, PEG and hydrolyzed collagen; (6) heat-resisting treatment and passivating treatment are conducted in sequence; 7) spraying an organic silane coupling agent; and (8) drying at 130-140 DEG C for 5-10 seconds, and then rolling at the speed of 4-6 m / min. According to the method, the formation of a high-roughness structure is avoided through laser leveling, the compact copper layer reinforces the substrate to improve the uniformity of copper nodules, the lamination surface Rz of a final product is smaller than or equal to 1.5 microns, Ra is smaller than or equal to 0.2 microns, the peel strength is larger than or equal to 0.7 N / mm, no copper powder falls off during lamination, and the method is suitable for preparing the high-precision copper foil.

The invention discloses a passivation solution for improving the corrosion resistance of X40CrMoVN16-2 high-nitrogen martensitic stainless steel, and belongs to the technical field of stainless steel surface treatment. The passivation solution is prepared from, by mass, 6%-10% of citric acid, 3%-5% of hydrogen peroxide, 0.8%-1.2% of sodium molybdate, 0.1%-0.16% of lauryl sodium sulfate and 0.06%-0.12% of nano-silica sol, the passivation temperature is 35-45 DEG C, and the passivation time is 50-60 min. The self-corrosion current density of a sample passivated by the passivation solution is reduced to 0.076 [mu] A.cm <-2 > from 0.892 [mu] A.cm <-2 > of an unpassivated sample, the pitting potential is increased to 1.54 V from-1.55 V of the unpassivated sample, and the corrosion resistance of the X40CrMoVN16-2 high-nitrogen martensitic stainless steel is effectively improved.

The application relates to a controllable preparation method of high-length-width-ratio molybdenum disulfide nanobelt or microbelt, and belongs to the field of low-dimensional material preparation. A molybdate solution is used as a molybdenum source, a sodium hydroxide solution is used as a catalyst, and sulfur powder is used as a sulfur source, and the molybdenum disulfide nanobelt or microbelt is obtained through a chemical vapor deposition method; by adjusting the different proportions of the mixed solution of sodium molybdate and sodium hydroxide, the size and orientation of the nanobelt / microbelt can be controlled and adjusted; by adjusting the growth time, the layer number of the nanobelt / microbelt can be adjusted; finally, the molybdenum disulfide nanobelt / microbelt with a length-width ratio greater than 100, different sizes, orientations and layer numbers can be controllably obtained on a substrate. The preparation process is simple, the production cost is low, the size, orientation and layer number are controllable, and the method is suitable for batch production.

The application discloses a kind of supplementary reverse osmosis water heat supply pipe network corrosion inhibitor and method, belong to the field of thermal power system equipment corrosion prevention, the corrosion inhibitor is used to slow down and inhibit heat exchange surface scale and carbon steel corrosion in heat network system;By weight percentage, including: amino trimethyl phosphonic acid tetrasodium 10-30%, 2-hydroxy phosphono acetic acid 10-15%, zinc sulfate 5-20%, sodium molybdate 1-5%, the rest water.This kind of corrosion inhibitor has certain scale inhibition effect, can provide scale inhibition effect to relatively low hardness water quality condition.Each component in corrosion inhibitor has good temperature resistance, can produce good corrosion inhibition effect at high temperature (<150 DEG C).

The invention provides a preparation method of high-purity ammonium dimolybdate. The method comprises the following steps: 1, washing industrial molybdenum oxide with hot water, stirring, and carrying out suction filtration to obtain an industrial molybdenum oxide filter cake; 2, sequentially adding pure water and sodium hydroxide into the industrial molybdenum oxide filter cake, and filtering to obtain a sodium molybdate solution; step 3, adding dilute sulphuric acid into the sodium molybdate solution, precipitating, filtering, and adding dilute sulphuric acid into the sodium molybdate solution; 4, dilute sulphuric acid is added into the organic phase, then the organic phase and a sodium molybdate solution are mixed, and a molybdenum-loaded organic phase is obtained through extraction; 5, reverse extraction is conducted on the molybdenum-loaded organic phase through a reverse extraction agent, and an ammonium molybdate solution is obtained; and 6, carrying out evaporative crystallization on the ammonium molybdate solution to obtain high-purity ammonium dimolybdate crystals. According to the method, starting from industrial molybdenum oxide, the maximum impurity removal effect is fully considered in each step, the target substance is purified in the whole process, no repeated step exists, the impurity removal range is wide, the efficiency is high, the product quality is good, and ammonium dimolybdate with the purity higher than 99.99% can be stably prepared.

The invention provides a water fertilizer for preventing the bending phenomenon of cut-flower roses as well as a preparation method and application of the water fertilizer, and belongs to the technical field of fertilizers. Comprising the following components: potassium nitrate, monopotassium phosphate, calcium nitrate terahydrate, ammonium dihydrogen phosphate, calcium sulfate, magnesium sulfate heptahydrate, chelated zinc, borax, sodium bicarbonate, chelated iron, chelated manganese, chelated copper and sodium molybdate dehydrate. The preparation method of the water fertilizer for preventing the bending phenomenon of the cut-flower roses is simple, quick in effect, low in cost, environment-friendly and safe, and the growth and development process of the cut-flower roses is accurately regulated and controlled by guaranteeing normal water fertilizer supply. The occurrence rate of the bending phenomenon of the cut-flower roses is obviously reduced, the quality of the cut-flower roses is effectively improved, and the quality improvement and efficiency improvement of the industry are promoted.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

The application relates to a tungsten alloy material wire cutting technical field, in particular to a preparation method of a high-strength tungsten wire composite material for cutting. The preparation method of the high-strength tungsten wire composite material for cutting comprises the following steps: preparing a base tungsten wire, preparing surface plated diamond, preparing modified plated diamond and preparing the high-strength tungsten wire composite material. In the application, the diamond micro powder is pretreated and activated, then is added into a plating solution of nickel sulfate, sodium molybdate and sodium hypophosphite dihydrogen, and is chemically plated to prepare a Ni-Mo-P plating layer on the surface of the diamond, and after the surface plated diamond is obtained, when the diamond is embedded into the base tungsten wire, a mechanical interlocking structure can be formed between the diamond and the base tungsten wire to resist the shearing stress during cutting, therefore, the preparation of the Ni-Mo-P plating layer on the surface of the diamond can effectively improve the bonding force between the diamond and the base tungsten wire and reduce the falling amount of the diamond during cutting.

The invention discloses an organic water-soluble fertilizer for improving plant immunity and a preparation method thereof, and relates to the technical field of plant fertilizers. The fertilizer comprises the following components: keratin hydrolyzed amino acid liquid, a sugar alcohol calcium solution, disodium octaborate tetrahydrate, a glycine boric acid compound, zinc sulfate heptahydrate, sodium molybdate dihydrate, an echinacea extract, hydroxypropyl-beta-cyclodextrin, chitosan oligosaccharide, sodium alginate and polyglutamic acid. The preparation method comprises the following steps: firstly, inclusion of an echinacea purpurea extract with hydroxypropyl-beta-cyclodextrin to form an echinacea purpurea-cyclodextrin mixed solution; then, zinc, molybdenum and the keratin hydrolysis amino acid liquid are chelated step by step, and a Zn-Mo-amino acid compound is formed; sequentially adding sugar alcohol calcium and a composite boron source, finally mixing with a colloidal network constructed by chitosan oligosaccharide, sodium alginate and the like, adjusting the pH value, and then homogenizing and filtering. Through organic chelation and molecular inclusion technologies, the immunologic function and stability are improved, and the disease incidence rate is effectively reduced.