22 results about "Sodium Molybdate Dihydrate" patented technology

The invention relates to a RuSe2-MoSe2 / NF heterojunction bifunctional catalyst for fully hydrolyzed seawater as well as a preparation method and application of the RuSe2-MoSe2 / NF heterojunction bifunctional catalyst, and belongs to the technical field of seawater electrolysis electrocatalysis. The preparation method of the bifunctional catalyst comprises the following steps: (1) mixing deionized water and absolute ethyl alcohol, and magnetically stirring to obtain a mixed solvent; then adding sodium borohydride and selenium powder into the mixed solvent, and stirring until the mixture is completely dispersed to obtain a mixed solution; adding sodium molybdate dehydrate and ruthenium trichloride into the mixed solution, introducing high-purity nitrogen, replacing air, and continuing magnetic stirring to obtain a dark brown precursor mixed solution; and (2) completely immersing the pretreated nickel foam NF in the precursor mixed solution, carrying out hydrothermal reaction, cooling to room temperature after the reaction, taking out the nickel foam NF, washing with deionized water for 3-5 times, then washing with absolute ethyl alcohol for 3-5 times, and drying to obtain the nickel foam NF. The bifunctional catalyst provided by the invention can efficiently catalyze a hydrogen evolution reaction and an oxygen evolution reaction in seawater at the same time.

This invention discloses a culture medium for the mass sporulation of *Substantia macrantha* and its application. The culture medium comprises the following components: lactose 21-23 g / L, yeast extract 14-16 g / L, potassium chloride 0.4-0.6 g / L, magnesium sulfate 0.4-0.6 g / L, potassium dihydrogen phosphate 0.4-0.6 g / L, disodium hydrogen phosphate 0.55-0.75 g / L, sodium molybdate dihydrate 5-7 mg / L, vitamin B6 50-60 mg / L, arginine 20-30 mg / L, and agar 18-22 g / L, diluted to volume with double-distilled water, with a natural pH. Using the culture medium prepared according to this invention to culture *Substantia macrantha* significantly increases the spore yield (164-fold), reaching 2.21 × 10⁻⁶. 8 conidia / cm 2 This provides a reference for the mass production of the fungal spores.

The invention provides a lithium battery negative electrode material MoS2 and a preparation method and application thereof.The preparation method comprises the following steps that S1, sodium molybdate dihydrate is taken and added into a glucose solution, thiourea is added after dissolution, dissolution continues, and a solution before reaction is obtained; the mass volume ratio of the sodium molybdate dehydrate to the thiourea to the glucose solution is 1g: (2-3g): (40-50mL); s2, transferring the solution before reaction into a polytetrafluoroethylene hydrothermal kettle, sealing, carrying out hydrothermal reaction at 180-200 DEG C for 12-36 hours to obtain a black precipitate, and carrying out ultrasonic treatment, cleaning and drying on the black precipitate to obtain a black product; and S3, in an inert gas atmosphere, carrying out annealing treatment on the black product, and cooling to obtain the MoS2 material. The MoS2 nanoflower prepared by the preparation method disclosed by the invention, as a negative electrode material of a battery, shows excellent cycling stability, rate capability and excellent morphological characteristics in the aspect of a battery material, shows excellent electrochemical performance, and provides reliable support for application of the MoS2 nanoflower in the field of batteries.

The present application belongs to the technical field of scale inhibitors, and particularly relates to a phosphorus-free composite scale inhibitor and a preparation method thereof. The phosphorus-free composite scale inhibitor comprises, in terms of mass fraction, 4.5-9.5 parts of beta-CD grafted hyperbranched polyglycidyl ether, 8-20 parts of AA / AMPS copolymer, 15-30 parts of PESA, 18-30 parts of CETSA, 6.5-10.5 parts of 2,4,6-trithiol-1,3,5-triazine, 3-6 parts of sodium molybdate dihydrate, 5-12 parts of sodium polyacrylate, 2-6 parts of N-octadecyl-D-glucosamide, 1.2-3 parts of ureido pyrimidone derivative containing isocyanate groups, 0.5-1.2 parts of 2,6-pyridine dicarboxamide, and 65-85 parts of water. The preparation method comprises the following steps: stirring raw materials such as beta-CD grafted hyperbranched polyglycidyl ether and water, adjusting pH, and keeping warm, then adding ureido pyrimidone derivative containing isocyanate groups and 2,6-pyridine dicarboxamide, and mixing uniformly to obtain the phosphorus-free composite scale inhibitor. The present application solves the problem of poor scale inhibition and corrosion inhibition effect of the phosphorus-free scale inhibitor in sewage containing high concentrations of calcium silicate and magnesium silicate components by reasonable compounding.

The present invention discloses a preparation method and application of a MoS2 / h-BN composite piezoelectric catalyst. The preparation of the composite piezoelectric catalyst uses thiourea, sodium molybdate dihydrate, urea, and boric acid as raw materials, and MoS2 NFs (nano-flowers) and h-BN are obtained by hydrothermal synthesis method and high-temperature calcination method respectively. The MoS2 / h-BN composite piezoelectric catalyst is obtained by adding water and stirring, wherein the stirring time is 8 to 12 h. The MoS2 / h-BN composite piezoelectric catalyst prepared by the present invention has a simple preparation process and a large yield, and has the characteristics of high catalytic activity and many reaction sites. This material can activate persulfate under ultrasonic conditions and efficiently catalytically degrade bisphenol F in water.

The invention discloses a bionic cocklebur fruit-shaped Mo modified Na2Mn8O16 nano material and a preparation method thereof, and belongs to the field of inorganic nano materials. The preparation method comprises the following steps: dissolving sodium molybdate dihydrate, potassium permanganate and urea in deionized water, and carrying out hydrothermal reaction, filtering, drying and calcining treatment to obtain a target product. The material presents a unique bionic multi-thorn structure in microstructure, the surface is provided with densely distributed burr-shaped protrusions, the length of the protrusions is about 30-50 nm, and the protrusions are radially arranged to form an open system with a high specific surface area. Through Mo modification and synergetic thorn morphology, the permeability of the electrolyte and the zinc ion migration rate are remarkably enhanced, and the conductivity and the structural stability of the material are effectively improved, so that the material shows excellent electrochemical performance. The process is simple, and the prepared material has a good application prospect in the field of zinc ion battery positive electrodes.

This invention discloses a low-temperature, rapid sintering method for preparing sodium molybdenum ceramic targets. Specifically, molybdenum trioxide powder and sodium molybdate dihydrate powder are first mixed using alcohol as a medium through ball milling to obtain a sodium molybdenum slurry. The slurry is then dried, filtered, ground, and sieved to obtain sodium molybdenum powder. The sodium molybdenum powder is then wetted with ammonium molybdate solution. The wetted sodium molybdenum powder is placed in a graphite mold for pre-pressing. The pre-pressed green body is then placed in a sintering furnace along with the graphite mold and subjected to spark plasma-assisted cold sintering at 200℃~400℃ and 50 MPa high pressure to obtain a sintered target body. The sintered body is then mechanically polished and ultrasonically vibrated to obtain a semi-finished target. The semi-finished target and a copper backing plate are brazed together, and after cleaning, drying, and vacuum sealing, the sodium molybdenum ceramic target is obtained. This invention enables the rapid (5 min) sintering of high-purity, high-density sodium molybdenum ceramic targets at low temperatures.

This invention relates to a method for preparing flower-like MoS2 materials and their application in NO2 detection. The method uses sodium molybdate dihydrate, thiourea, and anhydrous citric acid as raw materials, and ethanol and deionized water mixed in a specific ratio as solvents. For the first time, a vacuum-sealed calcination technique is used to successfully prepare a flower-like MoS2 material by precisely controlling the calcination temperature, which will be applied to the gas sensing field. Thanks to the strictly oxygen-free and sealed reaction environment created by the vacuum-sealed technique, this method effectively suppresses oxidation side reactions during material preparation, ensuring high crystallinity of the product. Simultaneously, the three-dimensional flower-like structure provides a larger specific surface area and abundant active sites. This unique structural and environmental advantage provides a solid material foundation for the application of MoS2 in NO2 gas sensing and demonstrates good application potential.

The invention discloses a nutrient solution for strawberry soilless substrate culture seedling and a preparation method, and belongs to the technical field of soilless culture. Wherein each liter of the nutrient solution comprises the following components: calcium nitrate tetrahydrate, potassium nitrate, ammonium dihydrogen phosphate, magnesium sulfate heptahydrate, monopotassium phosphate, ferric sodium ethylene diamine tetraacetate, boric acid, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate and sodium molybdate dehydrate; the preparation method comprises the following steps: dissolving the components in water, uniformly stirring, and adjusting the nutrient solution to be acidic, thereby obtaining the nutrient solution for soilless substrate culture and seedling culture of strawberries. By applying the nutrient solution prepared by the invention, the development of underground root systems, stem diameter increase, overground leaf growth and plant stress resistance of strawberry seedlings can be remarkably promoted, the nutrient solution is suitable for the whole period of strawberry substrate seedling culture, and theoretical guidance and practical reference can be provided for substrate culture of strawberry seedlings.

The invention discloses a Mo / Eu co-modified Mn2O3-Na2Mn8O16 composite material with a bionic grape shape and a preparation method of the Mo / Eu co-modified Mn2O3-Na2Mn8O16 composite material, and belongs to the field of inorganic materials. The preparation method comprises the following steps: dissolving sodium molybdate dihydrate, europium nitrate hexahydrate, a 50% manganous nitrate aqueous solution and urea in deionized water, and carrying out constant-temperature reaction in a hydrothermal reaction kettle; after the reaction is finished, filtering, putting a precursor into a drying oven for drying, then calcining in a muffle furnace, and cooling to obtain the bionic grape form Mo / Eu co-modified Mn2O3-Na2Mn8O16 composite material. The surface of the material is modified by Mo and Eu elements, the electrochemical performance of the composite material is improved, the multi-connected ball-like bionic grape shape is observed microcosmically, the surface of the structure is full of wrinkles, permeation of electrolyte in the composite material can be enhanced, the migration speed of zinc ions can be increased, and the service life of the composite material is prolonged. And the conductivity of the material in the charging and discharging process is further improved.

The present application relates to the field of metal material forging and heat treatment process, disclose a kind of based on tug 90kN level high-performance bitt's forging method, including preparation by industrial deionized water, film-forming main agent A, film-forming auxiliary agent B, sodium molybdate dihydrate, polyethylene glycol 400 and triethanolamine are quenched medium and heated constant temperature;After alloy structural steel blank is heated to heat, multiple-pass forging is carried out to obtain forgings;The forgings are pre-cooled to the first temperature, immersed in the quenching medium for first stage cooling, and the flow rate is controlled to maintain the first circulation flow rate;When the surface temperature of the forgings decreases to the second temperature, switch and maintain the second circulation flow rate for second stage cooling;When the core temperature of the forgings decreases to the water temperature, the forgings are lifted out and naturally cooled in still air, and the residual sensible heat is used to complete the self-tempering of the residual heat.The present application balances the cooling rate, avoids surface microcracks and improves the core hardenability.

The application discloses an organic molybdenum ionic liquid grease extreme pressure and wear-resistant additive, a preparation method and application. The method comprises the following steps: mixing 4-methyl-5-vinylthiazole and n-bromobutane, and stirring at room temperature; increasing the temperature to 50-60 DEG C, and stirring for 6-8 hours; after stopping the reaction, removing the residue by vacuum distillation to obtain transparent liquid product A; dissolving sodium molybdate dihydrate in deionized water, and stirring at room temperature; adding hydrochloric acid into the system, continuing to stir, adding the prepared transparent liquid product A into the system, stirring at room temperature for 3-5 hours, filtering, and vacuum drying to obtain the ionic liquid additive. The additive prepared by the application has a novel molecular structure, and 3-butyl-4-methyl-5-vinylthiazole ammonium molybdate salt is synthesized for the first time; as a lithium-based lubricating grease extreme pressure and wear-resistant additive, the additive can effectively improve the extreme pressure and wear-resistant performance of the lubricating grease. Meanwhile, the application also has the advantages of simple synthesis preparation method, high product yield and the like.

A method for preparing a functional polymer coating for exposed skeleton oil seals is described. The method primarily uses zinc nitrate hexahydrate (Zn(NO3)2·6H2O), 2-methylimidazole (2-Melm), hexagonal boron nitride (h-BN), and sodium molybdate dihydrate (Na2MoO4·2H2O) as raw materials. A zeolitic imidazolate framework (MOF) (ZIF-8) is grown in situ on the h-BN surface via an in-situ growth method. Sodium molybdate is then added as a corrosion inhibitor and coated within the ZIF-8 to produce a composite anticorrosive filler, Na2MoO4@ZIF-8 / h-BN (denoted as MZB). An epoxy resin and a curing agent are evenly dispersed with the MZB in a ratio of 3:1 and sprayed onto the skeleton surface. After spraying the anticorrosive coating, the oil seal skeleton is subjected to performance testing to observe surface corrosion. This coating forms a passivation film, extending the life of the metal skeleton, enhancing the oil seal's endurance and improving engine safety.

The invention discloses a culture method for ginseng adventitious root in-vitro propagation. The method comprises the following steps: inoculating disinfected ginseng adventitious roots to a culture medium containing ammonium nitrate, potassium nitrate, monopotassium phosphate, calcium chloride dehydrate, magnesium sulfate heptahydrate, EDTA-disodium, ferrous sulfate, potassium iodide, sodium molybdate dehydrate, zinc sulfate heptahydrate, cobalt chloride hexahydrate, copper sulfate pentahydrate, boric acid, manganese sulfate tetrahydrate, glycine, inositol, nicotinic acid, vitamin B6, vitamin B1 and glutamine; the method comprises the following steps: carrying out suspension culture on a ginseng adventitious root liquid culture medium containing casein hydrolysate, IBA and cane sugar for 7 days, adding jasmonic acid and gibberellin, and culturing for 30-40 days to obtain proliferated ginseng adventitious roots. The method is beneficial to rapid growth of ginseng tissue culture adventitious roots and efficient synthesis of ginsenoside, and an effective way is provided for directional production of ginsenoside in a cell factory.

The invention discloses a macroporous ZSM-5 molecular sieve loaded heteropolyacid desulfurization catalyst as well as preparation and application thereof, and belongs to the technical field of light fuel oil desulfurization. The method comprises the following steps: adding sodium metavanadate dihydrate, sodium dihydrogen phosphate hydrate and sodium molybdate dihydrate as raw materials into an aqueous solution, adjusting the pH value to about 4, refluxing for 8 hours, cooling, extracting with diethyl ether to obtain vanadium-substituted Dawson type heteropolyacid, and adjusting the material ratio to obtain different amounts of vanadium-substituted heteropolyacid. Then, the supported catalyst POM-CNTs (at) MOF-199-ZSM-5 is prepared through a one-pot method, and the obtained catalyst is applied to oxidative desulfurization of a light fuel simulation system. Oxygen in air is used as an oxidizing agent, and the thiophene removal rate can reach 98.90% after 2.5 h at 70 DEG C.

The invention discloses a preparation method and application of a copper molybdate nano material, and belongs to the technical field of inorganic nano materials. Comprising the following steps: S1, respectively dissolving copper salt and sodium molybdate dihydrate in deionized water; s2, mixing and stirring the obtained copper chloride solution and a sodium molybdate dehydrate solution; s3, adding a surfactant, stirring, continuing to stir cetyltrimethylammonium bromide, and transferring into a reaction kettle; s4, sealing the reaction kettle, transferring into a drying oven, and reacting at 170-200 DEG C; s5, transferring the product into a centrifuge tube, centrifuging with deionized water and absolute ethyl alcohol, transferring to a blast oven, and drying; and S6, after drying, putting a product into a mortar, grinding into powder, transferring the powder into a crucible, putting the crucible into a muffle furnace, slowly heating, preserving heat, and naturally cooling to obtain the copper molybdate nano material. The copper molybdate nano material is low in preparation cost, simple in preparation process, low in time consumption, low in energy consumption, free of other strong acid and strong alkali reagents and low in equipment requirement.

The application discloses a preparation method of a molybdenum disulfide / modified carboxymethyl cellulose hydrogel bead adsorbent for tetracycline hydrochloride, and relates to the technical field of functional materials and the field of environment; the method comprises the following steps: step 1, a sodium molybdate aqueous solution is prepared by using sodium molybdate dihydrate, thiourea and metal chlorides are added into the sodium molybdate aqueous solution, the mixed solution is completely reacted at 100-180 DEG C, the product is cooled to room temperature, black precipitates are collected by centrifugation, and the black precipitates are washed and dried to obtain fine powder of sulfided metal-doped molybdenum disulfide, step 2, a carboxymethyl cellulose solution with a mass concentration of 0.4-3% is prepared, 10-50% of tannic acid by mass of the carboxymethyl cellulose is added into the carboxymethyl cellulose solution and stirred at 50-90 DEG C to obtain a tannic acid-modified carboxymethyl cellulose mixed solution, and step 3, the sulfided metal-doped molybdenum disulfide powder is added into the tannic acid-modified carboxymethyl cellulose mixed solution and stirred at 50-90 DEG C to obtain a composite slurry, and the composite slurry is extruded into an ionic bath containing metal chlorides by using an ionic crosslinking method to prepare the molybdenum disulfide / modified carboxymethyl cellulose hydrogel bead adsorbent.

The application discloses a kind of nickel single atom modified molybdenum disulfide nanosheet and its preparation method and application, and specifically discloses using thioacetamide, sodium molybdate dihydrate to carry out simple hydrothermal reaction, prepare molybdenum disulfide nanosheet, then and by introducing nickel acetate preparation nickel single atom modified molybdenum disulfide nanosheet, and it is used in the reaction of photocatalytic reduction carbon dioxide. Relative to original molybdenum disulfide nanosheet, nickel single atom modified molybdenum disulfide nanosheet has more excellent photocatalytic reduction carbon dioxide (CO2) selectivity of CH4. The nickel single atom modified molybdenum disulfide nanosheet prepared can reduce CO2 into carbon monoxide (CO) and methane (CH4) under normal temperature and pressure by photocatalysis, and CH4 generation rate is about 27.2 μmol g ‑1 h ‑1 , CH4 Product selectivity and electron selectivity are about 80.4% and 94.2%.

The application relates to the field of environmental engineering and discloses an iron oxide-molybdenum disulfide heterojunction catalyst as well as a preparation method and application thereof. Sodium molybdate dihydrate and cysteine are dissolved in water, ultrasonic dispersion is carried out, ball milling treatment is carried out, a sulfur-containing molybdenum-based precursor is obtained through a first hydrothermal reaction, iron salt is added to carry out a second hydrothermal reaction, and the catalyst is obtained through washing and drying. The catalyst is easy to disperse in water, has a large specific surface area, is high in iron element content and uniform in iron element distribution, can form a large number of Fe-S-Mo synergistic active centers, can efficiently activate persulfate in a pH range of 2-10, and can remove chlorobenzoic acid by about 100% in 5 minutes under the condition of an initial concentration of 10 mg / L and near-neutral pH. The catalyst has rapid and efficient degradation performance on antibiotic organic pollutants, the preparation process does not need toxic and harmful organic solvents, the catalyst has stable structure and is environment-friendly, and is suitable for engineering scale-up application.

The present invention relates to a preparation method and application of a MIL68(Fe) / MoS2 composite catalyst, belonging to the technical field of water purification materials. In the present invention, sodium molybdate dihydrate and thiourea are added to deionized water and mixed evenly to obtain solution A, and the pH value of solution A is adjusted to 5.0 - 5.2 with acetic acid, and the reaction is carried out at a temperature of 190 - 210 °C for 23 - 24 h, followed by solid-liquid separation. The solid is washed successively with deionized water and ethanol, and then dried in vacuo to obtain molybdenum disulfide. Ferric chloride (III) trihydrate and 1,4-benzenedicarboxylic acid are added to N,N-dimethylformamide and mixed evenly to obtain solution B, and molybdenum disulfide is added to solution B and mixed evenly. The reaction is carried out at a temperature of 25 - 40 °C under ultrasonic conditions for 1 - 2 h, and then placed at a temperature of 90 - 110 °C for 110 - 120 h. After cooling to room temperature, solid-liquid separation is carried out. The solid is washed successively with N,N-dimethylformamide and acetone, and then dried in vacuo to obtain the MIL68(Fe) / MoS2 composite catalyst. The MIL68(Fe) / MoS2 catalyst of the present invention has abundant active sites and has an excellent degradation effect on activating persulfate (PMS) to degrade the dye rhodamine B, and the degradation efficiency can reach more than 98%.

An isopoly-molybdic acid coordination polymer and a method of manufacturing the same are provided. It relates to the field of catalysts for polylactic acid. A chemical formula of the isopoly-molybdic acid coordination polymer is [Mo2O4(μ2-OH)2(Htrz)]. Htrz is a 1,2,4-triazole ligand, and (Mo2O4)2+ is a binuclear isopoly-molybdic radical cation. (μ2-OH) is the bridging hydroxyl group. Sodium molybdate dihydrate and zinc nitrate hexahydrate undergo hydrothermal reaction in a closed condition to obtain an isopoly-molybdic acid coordination polymer that has a secondary layered structure. The synthesis of the isopoly-molybdic acid coordination polymer is simple with high yield and reproducibility. The isopoly-molybdic acid coordination polymer shows high catalytic activity towards the bulk ring-opening polymerization of lactide. The resulting polylactic acid has a weight average molecular weight exceeding 110,000. The polylactic acid has great potential in the fields of medical, degradable and packaging materials.

The invention belongs to the technical field of scale preventing and removing agents, and particularly relates to a phosphorus-free composite scale inhibitor and a preparation method thereof. The phosphorus-free composite scale inhibitor is prepared from the following components in parts by mass: 4.5 to 9.5 parts of beta-CD grafted hyperbranched polyglycidyl ether, 8 to 20 parts of AA / AMPS copolymer, 15 to 30 parts of PESA, 18 to 30 parts of CETSA, 6.5 to 10.5 parts of 2, 4, 6-trimercapto-1, 3, 5-triazine, 3 to 6 parts of sodium molybdate dehydrate, 5 to 12 parts of sodium polyacrylate, 2 to 6 parts of N-octadecyl-D-glucosamide, 1.2 to 3 parts of ureido pyrimidone derivative containing isocyanate group, 0.5 to 1.5 parts of 2, 4, 6-trimercapto-1, 3, 5-triazine, 0.5 to 1.5 parts of 2, 4, 6-trimethyl-1, 3, 5-triazine, 0.5 to 1.5 parts of 2, 4, 6-trimethyl-1, 3, 5 0.5 to 1.2 parts of 2, 6-pyridine dicarboxamide and 65 to 85 parts of water. The preparation method comprises the following steps: stirring beta-CD grafted hyperbranched polyglycidyl ether, water and other raw materials, adjusting the pH value, carrying out heat preservation, adding an isocyanate group-containing ureido pyrimidone derivative and 2, 6-pyridinedicarboxamide, and uniformly mixing to obtain the phosphorus-free composite scale inhibitor. Through reasonable compounding, the problem that a non-phosphorus scale inhibitor has poor scale inhibition and corrosion inhibition effects in sewage containing high-concentration calcium silicate and magnesium silicate components is solved.