66 results about "Molybdenum pentachloride" patented technology

The invention discloses a composite photocatalyst of metal phase molybdenum disulfide and two-dimensional carbon nitride and a preparation method of the photocatalyst. The material is formed by compounding molybdenum disulfide and carbon nitride according to a mass ratio of (1 to 1000) to (5 to 1000), wherein the molybdenum disulfide is a metal phase 1T, and the carbon nitride has a two-dimensional thin layer structure. The preparation method of the material comprises the following steps: (1) dispersing two-dimensional thin-layer carbon nitride, molybdenum pentachloride and thioacetamide in DMF (Dimethyl Formamide), stirring, and ultrasonically dispersing; (2) adding an obtained mixed solution into a high-pressure reaction kettle for high-temperature processing; (3) washing the processed substance for multiple times by virtue of ethanol and deionized water; and (4) freeze drying the washed substance to obtain the prepared photocatalyst. The photocatalyst prepared by the invention has good performance of decomposing water to generate hydrogen under the visible light and does not need precious metal platinum serving as an assistant catalyst. The preparation process is simple, the energy consumption is low, the cost is low, and the photocatalyst is easy to realize.

The invention discloses nickel-molybdenum alloy aerogel and a method for preparing the same. The method for preparing the nickel-molybdenum alloy aerogel includes 1), utilizing inorganic salt of nickel as a nickel source; 2), utilizing molybdenum pentachloride as a molybdenum source; 3), utilizing absolute ethyl alcohol as a solvent; 4), utilizing polyacrylic acid as an additive; 5), utilizing propylene epoxide as a gel accelerator; 6), adding sodium borohydride-ethyl alcohol solution into nickel-molybdenum gel to carry out prereduction on nickel-molybdenum; 7), carrying out supercritical ethyl alcohol drying on prereduced gel to obtain the nickel-molybdenum alloy aerogel. The nickel-molybdenum alloy aerogel prepared by the aid of the method comprises crystalline-state nickel-molybdenum alloy. A molar ratio of nickel:molybdenum is an optional proportion ranging from 10:1 to 1:10, nickel-molybdenum alloy nano-particles are stacked to form the nickel-molybdenum alloy aerogel, and the particle sizes range from 5 nm to 100 nm; the specific surface area of the nickel-molybdenum alloy aerogel ranges from 10 m<2> / g to 120 m<2> / g, and the density of the nickel-molybdenum alloy aerogel ranges from 0.02 g / cm<3> to 0.5 g / cm<3>. The nickel-molybdenum alloy aerogel and the method have the advantages that raw materials for the nickel-molybdenum alloy aerogel are easily available, and the method includes simple processes; the nickel-molybdenum alloy aerogel prepared by the aid of the method can be used for different types of gas-phase catalytic reaction.

The invention provides a molybdenum ditelluride electrochemical energy storage material which is molybdenum ditelluride (MoTe2) in a metastable state, a expression formula is 1T' MoTe2, and the morphology is a nano flower structure or nanosphere structure assembled by ultrathin nanosheets. The invention also provides a preparation method and application of the molybdenum ditelluride electrochemical energy storage material. The metastable-state hexagonal-phase molybdenum ditelluride nano flower structure or nanosphere structure with a uniform size and a regular shape is prepared by using oleylamine as a reducing agent and molybdenum hexacarbonyl or molybdenum pentachloride as a precursor matter, injecting a Te-trioctylphosphin precursor at certain temperature and controlling reaction temperature and reaction time. The material shows excellent super capacitor energy storage performance and is suitable for the new energy development field.

The invention aims to provide a preparation method for a great amount of molybdenum disulfide nanosheets at a normal pressure. The specific steps are as follows: weighing a certain amount of commercially purchased molybdenum pentachloride (MoCl5); placing the molybdenum pentachloride (MoCl5) in a square ceramic boat and placing the ceramic boat at the middle part of a horizontal tube type furnace with a length of 90 cm; weighing a certain amount of powdered sulfur and placing the powdered sulfur into the other square ceramic boat; placing the square boat at the entrance of argon gas of the horizontal tube type furnace; sealing the horizontal tube type furnace and vacuumizing the horizontal tube type furnace; filling the furnace with the argon gas and maintaining certain flow velocity; increasing the temperature to the preset temperature and keeping the temperature for 30 min; finally, under the protection of the argon gas, naturally cooling off the temperature to a room temperature; collecting and obtaining the molybdenum disulfide nanosheets from the ceramic boat loaded with the raw materials of molybdenum pentachloride.

The invention discloses a preparation method of a molybdenum disulfide and sulfur-doped carbon sphere composite material counter electrode based on a dye-sensitized solar cell graphite paper substrate. The preparation method includes the following steps: adding an appropriate amount of carbon spheres into ethanol to form uniform carbon dispersion liquid by ultrasonic treatment; and then adding anappropriate amount of molybdenum pentachloride into the carbon dispersion liquid, applying drops on graphite paper treated with sodium hydroxide, drying, placing in a vacuum tube furnace, placing sulfur powder at the end close to an air inlet, performing heat preservation at 800DEG C in an argon atmosphere, and cooling to obtain a molybdenum disulfide and sulfur-doped carbon sphere composite material that grows on a graphite paper substrate. Molybdenum disulfide in the composite material has a large number of defects in the crystal lattice, and thus the composite material has more catalytic active sites, and the catalytic activity of the composite material as a counter electrode can be improved; and the molybdenum disulfide / sulfur-doped carbon sphere composite material counter electrode has excellent photoelectric properties and is obviously superior to a pure molybdenum disulfide counter electrode.

The invention discloses a high weather-resistant and anti-interference anticorrosive paint for power distribution cabinets. The anticorrosive paint is characterized by comprising the following raw materials by weight: 22-25 parts of ethylene propylene terpolymer, 30-36 parts of bisphenol A type epoxy resin, 2-3 parts of chlorinated paraffin, 4-6 parts of glycol, 1-2 parts of dibutyl phthalate, 2-4 parts of vermiculite powder, 2-3 parts of celestite powder, 1-2 parts of triphenylmethyl ethylphenol polyoxyethylene ether, 2-3 parts of sodium benzoate, 5-7 parts of talcum powder, 2-3 parts of molybdenum pentachloride, 1-2 parts of vinyl tri(beta-methoxy ethoxy) silane, 1-2 parts of sulfonated lanolin calcium soap, 1-2 parts of carboxymethyl cellulose, 15-17 parts of butyl acetate, 6-9 parts of xylene and 4-7 parts of an aid. The paint provided by the invention has good decorative effect on the power distribution cabinet under natural conditions, and the paint film is smooth and flat, has good gloss and high weather resistance, and is not easy to turn yellowing or chalking; the added additive promotes the film forming ability of the paint, and also has anti-electromagnetic interference effect to prevent the interference on the electronic equipment in the power distribution cabinet, so as to avoid error signal.

The invention discloses a molybdenum-based composite material prepared from microwave sparks as well as a method and application thereof. The method comprises the following steps: dissolving a molybdenum source and a carbon source in an organic solvent, and uniformly mixing solutions by ultrasonic treatment; after the ultrasonic treatment is finished, drying in an inert atmosphere to obtain a powdery solid, wherein the molybdenum source is molybdenum pentachloride, the carbon source consists of glucose and nano carbon subjected to nitrification treatment in a mass ratio of 1: (1-3), and the organic solvent is cyclohexane or normal hexane; and carrying out microwave treatment on the powdery solid in an argon inert atmosphere to obtain the molybdenum-based composite material. According to the invention, Molybdenum pentachloride is adopted as a molybdenum source, nanocarbon and glucose subjected to nitrification treatment are adopted as carbon sources, and a quaternary molybdenum-based composite material is obtained in cooperation with a microwave treatment means; the material not only contains Mo2C, MoO2 and nanocarbon, but also contains simple substance Mo, so that the electro-catalytic hydrogen production performance of the molybdenum-based composite material serving as an electro-catalytic hydrogen production catalyst is effectively improved.

The invention relates to a lithium-oxygen battery electrolyte using molybdenum pentachloride as redox medium and preparation and application thereof. The electrolyte includes soluble lithium salt as solute, proton-free solvent and additive molybdenum pentachloride. The concentration of solute in the electrolyte is 0.1- 1 mol / L. The concentration of molybdenum pentachloride in electrolyte is 0.01-0.1 mol / L. As that molybdenum pentachloride is use as an electrolyte additive in the lithium oxygen battery, the invention facilitates the formation of the cyclic lithium peroxide dure the discharge process, and also plays the role of stabilizing the carbon electrode. Lithium peroxide discharge products can be effectively decomposed in the charging process, and the cycle life and reversibility ofthe battery can be improved by decreasing the charging voltage. At the same time molybdenum pentachloride is stable in the battery system and no side reaction occurs. The invention has the advantagesof low cost, easy access, high efficiency and convenience.

The invention discloses a preparation method and application of a Mo-doped HNb3O8 nanosheet, and the preparation method comprises the following steps: dissolving niobium pentachloride in ethanol, adding a certain amount of molybdenum pentachloride powder into the solution, completely dissolving the mixed solution by ultrasonic treatment and oscillation, dropwise adding an aqueous solution of tetraalkylammonium into the mixed solution, and stirring at a constant speed to completely dissolve; then putting the obtained solution into a high-pressure reaction kettle for heating reaction; and cooling, washing and drying to obtain the Mo-doped HNb3O8 nanosheet. The Mo-doped HNb3O8 nanosheet material prepared by the method is used as a photocatalyst, and has the advantages of proper forbidden bandwidth, strong visible light absorption, higher hydrogen production and good cycling stability.

The invention relates to a diamino molybdenum dicyclopentadienyl complex as well as a preparation method and application thereof. The preparation method comprises the following steps of: dissolving molybdenum pentachloride in a first solvent, and performing cooling to prepare a first solution; dissolving substituted cyclopentadiene lithium and sodium borohydride in a second solvent, and performingcooling to prepare a second solution; mixing the first solution and the second solution, performing stirring for 2-4 hours, performing heating for 55-75 hours, performing a reaction for 20-18 hours,adding alkane into a reaction product, performing extraction, collecting a water phase, performing filtering, adding chloroform into a filtrate, and stirring for 8-12 hours to prepare bis (substitutedcyclopentadiene lithium) molybdenum dichloride; and making the bis (substituted cyclopentadiene lithium) molybdenum dichloride with dialkylamine lithium. According to the preparation method, the dichloro-molybdenum dicyclopentadienyl complex is synthesized in one step and then reacts with the lithium dialkylamine, so that the diamino-molybdenum dicyclopentadienyl complex can be prepared, so thatreaction steps are shortened, production cost is reduced, the higher yield is maintained, and the industrial production is better facilitated.

The invention discloses a preparation method of a carbon nanotube composite catalytic membrane. The preparation method comprises the following steps: providing a carbon nanotube membrane; providing aprecursor solution, wherein the precursor solution contains ferric nitrate, nickel chloride and molybdenum pentachloride; arranging the precursor solution on the carbon nanotube film, and drying the precursor solution to obtain a precursor film, and forming a plurality of holes in the precursor film at intervals; finally, annealing the precursor film with the plurality of holes, and applying sulfur powder thereto in the annealing process. The invention also relates to the carbon nanotube composite catalytic membrane prepared by the preparation method of the carbon nanotube composite catalyticmembrane.

The invention discloses a method for synthesizing an ultrafine ternary cobalt molybdenum phosphorus nanorod and belongs to the technical field of preparation of nanomaterials. The ultrafine ternary cobalt molybdenum phosphorus nanorod is synthesized from cobalt chloride, molybdenum pentachloride and trioetylphosphine as raw materials according to the mass ratio of 0.052 to 0.0546 to 1.66 and oleylamine as a ligand by adopting a solvothermal method. A sample prepared by the preparation method disclosed by the invention has the advantages of high phase purity, high crystallinity and uniform particle size distribution; and the preparation method has the advantages of simple process, controllable morphology and aspect ratio, high repeatability and the like.

The invention discloses a preparation method and application of a super-hydrophobic molybdenum-loaded catalyst, and belongs to the technical field of material preparation, electro-catalysis and fine chemical engineering. The high-performance super-hydrophobic molybdenum-loaded phosphotungstic acid electrocatalyst for electrocatalytic nitrogen fixation is developed by using commercial phosphotungstic acid PTA and molybdenum pentachloride as raw materials, feeding in batches, heating and stirring under mild conditions, using phosphotungstic acid with rich oxygen coordination sites as a carrier and using molybdenum chloride pentahydrate as a precursor of a modification species. The prepared electrocatalyst has good stability and electrocatalytic performance, and can effectively solve the problems that in current normal-temperature normal-pressure electrocatalytic synthesis of ammonia, nitrogen is difficult to adsorb and activate, and hydrogen evolution competitive reaction is dominant. And the catalyst has the advantages of simple preparation process, low cost, green and environment-friendly production process and great application potential.

The invention provides a molybdenum ditelluride electrochemical energy storage material, the material is metastable molybdenum ditelluride, and its expression is 1T'-MoTe 2 , the morphology is a nanoflower structure or a nanosphere structure assembled by ultrathin nanosheets. The invention also provides a preparation method and application of the material, using oleylamine as the reducing agent, molybdenum hexacarbonyl or molybdenum pentachloride as the precursor of molybdenum, injecting the tellurium-trioctylphosphine precursor at a certain temperature, and controlling the reaction temperature and reaction time, thereby preparing a metastable hexagonal phase molybdenum ditelluride nanoflower structure or nano spherical structure with uniform size and regular shape. This type of material exhibits excellent supercapacitor energy storage performance and is suitable for the field of new energy development.

The invention discloses a method for regulating and controlling number of molybdenum disulfide layers in a graphene / molybdenum disulfide heterojunction and belongs to the technical field of preparation of semiconductor materials. By taking single element sulfur as a sulfur source and molybdenum pentachloride as a molybdenum source, wherein one sulfur source and one molybdenum source are available,a preparation mode of a double-temperature area is adopted to prepare the molybdenum disulfide / graphene heterojunction on a silicon dioxide / silicon substrate with graphene. By controlling the qualityof molybdenum pentachloride, the number of molybdenum disulfide layers in the graphene / molybdenum disulfide heterojunction is regulated and controlled effectively.

The present invention discloses an ammonium persulfate catalyst extracted from coking wastewater and an implementation method therefor. The catalyst comprises the following components in percentage by mass: 85-95% of binuclear cobalt phthalocyanine ammonium sulphonate, 1-5% of molybdenum pentachloride, and 4-15% of disodium EDTA. The bath temperature of the coking wastewater is 65 DEG C. The amount of the catalyst to be added is 1%. The reaction can be performed by blowing air with 12-hour reaction time and a pH range of 7-8.

The invention discloses a natural nitrogenase-like FeMo nano-enzyme and a preparation method and application thereof, and relates to the technical field of nano-enzymes and agriculture, the method comprises the following steps: respectively dissolving 1, 3, 4-thiadiazole-2, 5-diamine, molybdenum pentachloride, ferric chloride and 2, 5-thiophenedicarboxylic acid in absolute ethyl alcohol; the preparation method comprises the following steps: adding a molybdenum pentachloride solution and a ferric chloride solution into a 1, 3, 4-thiadiazole-2, 5-diamine solution, and stirring until the solution is yellowish-brown to obtain a FeMo nano-enzyme mixed solution; and adding a 2, 5-thiophenedicarboxylic acid solution into the FeMo nano-enzyme mixed solution, stirring, and sequentially centrifuging, drying and calcining to obtain the natural nitrogenase-like FeMo nano-enzyme. The FeMo nano-enzyme has nitrogen fixation activity similar to that of natural nitrogenase, nitrogen and water can generate ammonia at normal temperature and normal pressure, and the technical problem that in-situ generation of ammonia in plants at normal temperature and normal pressure is difficult in the prior art is solved.

The invention discloses a preparation method of a key intermediate, represented as the formula V, of triphenylene bisborate. The method includes the following steps: a) with 1,2-dibromobenzene and 3-methoxyphenylboronic acid as raw materials, performing a coupling reaction to obtain a compound (1) which is represented as the formula (I); b) adding molybdenum pentachloride to the compound (1) to perform oxidizing coupling to obtain a compound (2) which is represented as the formula (II); c) adding an acid to the compound (2) to perform a demethylating reaction to obtain a compound (3) which isrepresented as the formula (III); d) performing a reaction to the compound (3) with trifluoromethanesulfonic anhydride to prepare a compound (4) which is represented as the formula (IV); e) performinga boronizing reaction to the compound (4) with catalysis by Pd (II) to prepare the key intermediate (5), which is represented as the formula (V), of the triphenylene bisborate. In the invention, theinitial raw material, 1,2-dibromobenzene and 3-methoxyphenylboronic acid, are low in cost and easy to obtain; the total yield of the product, key intermediate (5) of the triphenylene bisborate, can reach 48.6%; the reaction process is free of liquid bromine, which is liable to cause environment pollution.

The invention discloses a preparation method of a graphene nanomaterial. The preparation method comprises the following steps: mixing a molybdenum pentachloride water solution, a copper chloride watersolution and a potassium sulfide water solution, carrying out ultrasonic treatment for 5-10 minutes, then adding polysorbate, and carrying out magnetic stirring for 10-20 minutes; transferring the solution into a closed reaction kettle, and stirring at 80-100 DEG C for reacting for 30-40 minutes; separating, so as to obtain MoS / CuS particles; ultrasonically dispersing graphene oxide into deionized water, adding N-dodecyl propylene diamine ammonium bromide, and adequately and uniformly stirring; and adding the MoS / CuS particles, the obtained solution and sodium dodecyl benzene sulfonate into ahydrothermal reaction kettle, carrying out hydrothermal reaction at 250-280 DEG C for 3-6 hours, naturally cooling, carrying out filtration, distilled water washing and drying, carrying out thermal treatment at 650-800 DEG C in a 85% nitrogen / 15% hydrogen mixed atmosphere for 3-6 hours, so as to obtain the graphene nanomaterial.

An embodiment of the invention discloses a modified graphene nano-material and a preparation method thereof. The modified graphene nano-material is prepared from the following raw materials in parts by weight: 15-18 parts of graphite powder, 25-35 parts of deionized water, 15-25 parts of polysorbate, 1-5 parts of a catalytic additive, 1-5 parts of magnesium oxide, 10-15 parts of an aqueousmolybdenum pentachloride solution, 5-10 parts of an aqueouscopper chloride solution, 10-15 parts of an aqueous potassium chloride solution, 1-3 parts of modified calcium carbonate powder, 1-5 parts of modified bauxite and 10-15 parts of sodium N-dodecylbenzene sulfonate. According to the invention, the heat dissipation material for providing a high heat conduction and heat dissipation effect for a microelectronic device is obtained.

The invention discloses a platinum-molybdenum metal bi-component nano-catalyst for producing hydrogen by electrolyzing water and a preparation method thereof, and belongs to the technical field of nano-catalysts, the platinum-molybdenum metal bi-component nano-catalyst comprises carbon black and platinum-molybdenum metal bi-component nano-particles loaded on the surface of the carbon black, the mass fraction of platinum is 0.9-20%, the mass fraction of molybdenum is 12-25%, and the mass fraction of molybdenum is 0.5-1%. The preparation method comprises the following steps: dissolving platinum acetylacetonate and molybdenum pentachloride in an organic solvent, adding carbon black, heating to obtain mixed powder, and calcining at 500-600 DEG C for 4-6 hours. Metallic molybdenum with the atomic radius and the crystal structure similar to those of metallic platinum is introduced into metallic platinum, the morphology and the electronic structure of the platinum nano-catalyst are regulated and controlled through the interaction between the metallic molybdenum and the metallic platinum, adsorption and desorption of reactants and intermediates are optimized, the catalytic activity of the nano-catalyst in the water electrolysis hydrogen evolution reaction is remarkably improved, and the catalytic activity of the nano-catalyst in the water electrolysis hydrogen evolution reaction is improved. Meanwhile, the usage amount of metal platinum is greatly reduced, and the cost is remarkably reduced.

The invention discloses a molybdenum disulfide anticorrosive coating based on electrochemical deposition and a preparation process thereof. The molybdenum disulfide anticorrosive coating comprises anelectroplating reactant, a solvent and an auxiliary agent, wherein the electroplating reactant comprises the components of, in parts by weight, 27-41 parts of molybdenum pentachloride, and 6.5-9.6 parts of elemental sulfur, and the solvent comprises the components of, in parts by weight, 65-75 parts of pure water and 25-35 parts of ethylene glycol. According to the molybdenum disulfide anticorrosive coating, the components of the anticorrosive coating and the preparation process are arranged, so that molybdenum disulfide crystal grains in the coating are of a fullerene structure, the added auxiliary agent is partially inserted between molybdenum disulfide layers, carbonized at high temperature, and promotes formation of the fullerene structure, and mutual dissolution between metal zinc andmetal aluminum in modified graphite promotes and improves the lubricating property, the corrosion resistance and the mechanical property of the coating, so that the comprehensive performance of the coating is improved while the corrosion resistance function of the coating is realized, and the coating is suitable for wide popularization and application.

The invention discloses a novel environment-friendly composite material and a preparation process thereof. The novel environment-friendly composite material comprises the following raw materials in percentages by weight: 5 to 8% of chromium trichloride, 5 to 8% of tungsten hexachloride, 8 to 12% of molybdenum pentachloride, 10 to 15% of an aluminum hydroxide colloid and 60 to 80% of modified halloysite. According to the invention, a composite porous material is obtained by melt-inserting aluminum hydroxide colloid particles into modified halloysite interlayers, so adsorption performance of halloysite is increased; the novel environment-friendly composite material is obtained through an adsorption reaction of chromium trichloride, tungsten hexachloride, molybdenum pentachloride and the prepared composite porous material; a carbon monoxide absorption reaction kettle is intelligently controlled; through respective coordinated complexation of carbon monoxide gas with chromium, tungsten andmolybdenum on the environment-friendly composite material in a reaction solvent, a chromium element, a tungsten element and a molybdenum element can coordinate with 6 carbon monoxides; thus, adsorption performance of the novel environment-friendly composite material to carbon monoxide is greatly improved, and energy conservation and environmental protection are realized.

A method of conditioning MoCl5 comprises heating a container of MoCl5 to a temperature ranging from approximately 140° C. to 190° C. for a period ranging from approximately 2 hours to approximately 100 hours to produce a MoCl5-containing composition comprising approximately 10% weight to approximately 60% weight of Phase 1 MoCl5 and 90% weight to approximately 40% weight of Phase 2 MoCl5 as determined by X-ray diffraction. This MoCl5-containing composition is expected to be more thermally stable and provides stable vapor supply.

The invention discloses a high-efficiency method for synthesizing adamantane. According to the method, endo-tetrahydrodicyclopentadiene is adopted as a raw material, anhydrous molybdenum pentachloride, anhydrous manganese dichloride, anhydrous iridium chloride or anhydrous cerium chloride are adopted as a composite catalyst, phosphorus oxychloride and phosphorus trichloride are adopted as auxiliary agents, and trimethyl phosphate, triethyl phosphate and other phosphate are adopted as solvents so as to prepare the adamantane through catalysis. Due to the characteristics of adamantane, the raw materials, the catalysts and the solvents, the product can be precipitated in the solvents, and unconverted raw materials, intermediates and catalysts can be reused in the solvents.

The application provides an inorganic doped electrochromic fabric and a preparation method thereof. The flexible conductive fabric is first treated with an ammonium sulfate solution for hydrophilic treatment to obtain a pretreated fabric; then a tungsten chloride anhydrous ethanol solution is prepared, and molybdenum pentachloride powder is added to prepare a precursor solution; finally, the pretreated fabric is placed in the precursor solution for high-temperature reaction, and the inorganic doped electrochromic fabric is obtained after the reaction is completed. The flexible conductive fabric is treated with the ammonium sulfate solution, functional treatment is realized, and the surface activity is improved, so that the chemical bonding between the fabric and the electrochromic film is promoted; the molybdenum pentachloride is selected as the precursor, which provides a site for the nucleation and growth of WO3 on the surface of the fabric, so that a stable WO3 and MoO3 composite film is formed, the film serves as an electrochromic layer, the fabric has excellent electrical, optical and mechanical properties, has a fast optical response time and a high coloring efficiency, and can be applied to the fields of smart clothes and implantable display.

The invention discloses a chlormezanone drug intermediate 4-chlorobenzaldehyde synthesis method, which mainly comprises: adding 2-methyl-3-bromo-5-chlorophenol and a 4-methyl-2-pentanone solution to areaction container, controlling the stirring speed, increasing the temperature of the solution, adding molybdenum pentachloride powder in batches, continuously carrying out the reaction after completing the adding, carrying out pressure reducing distillation, washing the obtained distillate multiple times in a butyl valerate solution, washing multiple times in a cyanogen solution, and re-crystallizing in a 2-methylbutyric acid solution to obtain the crystal 4-chlorobenzaldehyde.

The invention discloses a preparation method of a nickel-molybdenum-nitrogen co-doped carbon-based catalyst based on a sodium chloride template. According to the method, nickel chloride hexahydrate isused as a nickel source, molybdenum pentachloride is used as a molybdenum source, trihydroxymethyl aminomethane is used as a pH regulating material, dopamine hydrochloride is used as an adsorbent, and inorganic salt sodium chloride is used as a template. The preparation method mainly comprises the following steps: dissolving nickel chloride hexahydrate, molybdenum pentachloride and sodium chloride in deionized water at room temperature to obtain a mixture; sequentially adding trihydroxymethyl aminomethane and dopamine hydrochloride, and continuously stirring to obtain a uniform mixed solution; freeze-drying the mixed solution to obtain a catalyst precursor; carrying out high-temperature pyrolysis carbonization on the obtained precursor in an argon atmosphere, and carrying out centrifugalwashing to remove a pure product; and carrying out high-temperature annealing on the obtained product again to obtain a nickel-molybdenum-nitrogen co-doped carbon-based catalyst sample with stable performance. The method is simple, easy to operate and low in cost, large-batch preparation can be achieved, and the prepared nickel-molybdenum-nitrogen co-doped carbon-based catalyst is high in electrocatalytic activity and good in stability and has good application prospects.

The invention discloses a preparation method and application based on molybdenum tetrasulfide-coated gold nanorods. The preparation method is as follows: reacting gold nanorods with sodium thiosulfate solution and molybdenum pentachloride solution for 4 to 8 hours to obtain molybdenum tetrasulfide-coated gold nanorods with peroxide mimetic enzyme activity. The obtained molybdenum tetrasulfide-coated gold nanorod mimic enzyme was used to detect the content of mycotoxin zearalenone. The present invention utilizes the characteristic of catalytically decomposing hydrogen peroxide by molybdenum tetrasulfide-coated gold nanorods, and then according to the specific combination of antigen and antibody, zearalenone and zearalenone are modified by molybdenum tetrasulfide-coated gold nanorods. Enone aptamer-specific action, and then achieve the purpose of detecting zearalenone; the present invention uses molybdenum tetrasulfide coated gold nanorods to detect zearalenone, which has high sensitivity, obvious phenomenon, simple operation and effective Accurately determine the concentration of zearalenone in crops.

The invention discloses a process for preparing molybdenum trichloride, which comprises the following steps of: (1) mixing excessive molybdenum pentachloride and stannous chloride powder, and heating the mixed material in a reactor to carry out replacement reaction to generate molybdenum trichloride and stannic chloride; (2) gasifying the generated stannic chloride, leaving the reactor, entering a cooling system for receiving and cooling to obtain stannic chloride liquid; (3) after the reaction is completed, switching a cooling system into a molybdenum pentachloride receiver, heating the reactor to a certain temperature, and gasifying redundant molybdenum pentachloride into the molybdenum pentachloride receiver; and (4) cooling the reactor, and discharging to obtain a molybdenum trichloride product. And (5) hermetically filtering the tin tetrachloride liquid to obtain a tin tetrachloride product and molybdenum pentachloride filter residues, wherein the molybdenum pentachloride filter residues and cooled and collected molybdenum pentachloride can be recycled as reaction raw materials. According to the method, the yield of molybdenum trichloride is increased, meanwhile, the production cost is reduced, the purity of the by-product tin tetrachloride exceeds 99%, the waste gas amount in the production process is greatly reduced, and the method belongs to a green and environment-friendly process.