178results about "Molybdenum oxides/hydroxides" patented technology

The invention relates to the technical field of chemical reactions, and particularly discloses a reaction device and method for preparing high-purity molybdenum trioxide, and the reaction device for preparing high-purity molybdenum trioxide comprises a reaction kettle; the filter bag is arranged in the reaction kettle; the lifting column is arranged in the discharging sleeve in a lifting and sleeving manner; the lifting driving part is arranged at the upper end of the reaction kettle and is used for driving the lifting column to do lifting motion; the spoiler is movably arranged on the lifting column and located in the bag body; the bag body shakes up and down to effectively promote mixing of reaction solutions in the vertical direction and enhance the hierarchical fluidity of the solutions, meanwhile, the spoiler pushes the reaction solution in the center to the periphery and gathers the peripheral solutions to the center to form effective radial mixing, radial flow mixing of the reaction solutions is achieved, and the reaction effect is improved. Any possible local concentration gradient can be broken, uniform distribution of reactants in the whole reaction kettle is ensured, sufficient mixing of a reaction solution is ensured, and the product purity is effectively improved.

The present invention is directed towards methods for isolating molybdenum compounds from a mixture of fission products. The mixture of fission products may be extracted from a molten salt reactor system. Utilizing a phase transfer agent, the molybdenum compounds may be extracted from an aqueous solution into an organic solution, thereby isolating the molybdenum compound from the mixture of fission products. Molybdate may then be isolated from the resulting organic solution and provided to a generator to facilitate transformation into technitum-99m.

To provide glass fiber yarn and a method for manufacturing the same.SOLUTION: A method for manufacturing glass fiber yarn comprises a coating step of coating a molybdenum compound on the surfaces of inorganic particles to form the surface-treated inorganic particles; a sintering step of sintering the surface-treated inorganic particles on a temperature condition of 400 to 1,000°C in a nitrogen gas atmosphere; a mixture step of mixing the surface-treated inorganic particles into a molten glass raw material; and a spinning step of spinning the molten glass raw material including the surface-treated inorganic particles to form glass fiber yarns.SELECTED DRAWING: Figure 1

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of new energy. According to the lithium manganese iron phosphate positive electrode material provided by the invention, the amorphous precursor and the high-crystallization precursor are used as raw materials, and the high-crystallization precursor causes a relatively high specific surface area of the material and affects the processability; the amorphous precursor can improve the compaction density and the specific surface area of the material, and the capacity and the cycle performance of the lithium manganese iron phosphate positive electrode material are ensured by combined use of the two precursors. The combination of elements with different valence states is used, so that the doping and coating effects are achieved at the same time, and the performance of the material is synergistically improved; elements with relatively low valence states are easily doped in a lithium manganese iron phosphate crystal structure, so that the capacity of the material is improved; and elements with relatively high valence states are distributed on the surfaces of lithium manganese iron phosphate particles, so that the stability of the surface structure of the material is improved.

The invention discloses a molybdenum oxide nanorod material, a preparation method of the molybdenum oxide nanorod material and application of the molybdenum oxide nanorod material to improvement of corn nutrient utilization, growth promotion and lodging resistance, and belongs to the technical field of corn nutrient utilization and agricultural nano material application. The morphology and dispersity of the nanorod are optimized by combining molecular composition characteristics of key enzymes (such as nitrate reductase and glutamine synthetase) in a corn nutrient utilization process, and finally the functional nanorod with targeting property and biocompatibility is obtained and can be widely applied to nutrient regulation and control scenes of corn water culture and field planting. After the material is applied, the activity of nitrate reductase and glutamine synthetase of a corn root system can be activated in a targeted manner, the nutrient utilization efficiency is accurately improved, and sufficient nutrition support is provided for plant growth. After the fertilizer is applied to plants, the root system is promoted to be developed, the stalks are thick and strong, the lodging resistance is remarkably enhanced, the protein content of the plants and grains can be increased, and the synergistic effects of efficient nutrient utilization, robust plant growth, lodging resistance and yield increase are achieved.

The invention discloses a metal oxide nano material as well as a preparation method and application thereof, and belongs to the technical field of laser preparation of metal oxides. According to the preparation method disclosed by the invention, the metal salt powder on the surface of the substrate material is treated by utilizing infrared laser, and under the action of the infrared laser, the infrared laser, the metal salt powder and the substrate material generate light-substance interaction including heat transfer and deformation, so that the metal salt powder and the substrate material are subjected to heat transfer and deformation; the metal salt powder is subjected to a chemical reaction, and a large amount of continuous nano metal oxide materials are generated on the surface of the substrate material; the metal oxide nano material obtained by the invention has the advantages of short laser processing time, high energy density, wide material application range and the like, and the product generated by laser processing has the advantages of good crystallinity, patterning and in-situ generation.

The invention relates to the technical field of battery positive electrode materials, discloses a manganese-based battery positive electrode material precursor as well as a preparation method and application thereof, and belongs to the technical field of battery preparation. According to the technology for preparing the manganese-based battery positive electrode material precursor, a solid-phase method is mainly adopted, a high-temperature melting technology is adopted, the manganese-based positive electrode material is subjected to doping modification through multiple elements at the same time, then surface coating is carried out, the density of the synthesized positive electrode material is improved, the structural stability of the synthesized positive electrode material is enhanced, and the morphology, the crystal face and the crystal boundary of the positive electrode material are optimized; the side reaction between the crystal interface of the positive electrode material and electrolyte is inhibited, the service life is prolonged, and the safety performance during use is enhanced. A small amount of water vapor and carbon dioxide gas generated in the preparation process are discharged at high altitude, so that the environment is not polluted.

The present invention provides a method for preparing high-purity molybdenum trioxide, belongs to the technical field of molybdenum trioxide production, and comprises the following steps: step S1, molybdenum ore is crushed and ground, roasted, crude molybdenum oxide is obtained, added to sodium hydroxide solution, heated and stirred, filtered, and crude sodium molybdate solution is obtained; step S2, the crude sodium molybdate solution is adjusted to pH 5.5-7.0, an exchange column of macroporous cation exchange resin is passed, and the solution pH is adjusted to 7.0-8.5, and an exchange column equipped with anion exchange resin is passed to obtain a high-purity sodium molybdate solution; step S3, excessive ammonia water is added to the high-purity sodium molybdate solution, ammonium molybdate is precipitated, washed, and dried to obtain high-purity ammonium molybdate; step S4, high-purity ammonium molybdate is put into a rotary calcining furnace, the inner wall of the furnace tube is sprayed with rare earth oxide, and a calcination mode of first heating, then cooling, and then heating is adopted to prepare high-purity molybdenum trioxide. The present invention realizes the purpose of producing high-purity molybdenum trioxide.

A process produces high-purity vanadium chemicals from vanadium raw materials having high molybdenum contents. Molybdenum is selectively precipitated via vanadium from alkaline vanadate solutions using the following process steps: providing a molybdenum-containing alkaline vanadate solution, adding calcium hydroxide as a precipitant in portions while keeping the pH constant between 6 and 7 using acid, mixing the solution, solid-liquid separation of the resulting suspension, and further processing the low-molybdenum alkaline vanadate solution to produce a high-purity vanadium chemical having a molybdenum content of at most 500 ppm.

The invention provides a method for generating molybdenum dioxide or molybdenum carbide through reduction of molybdenum trioxide and application, and the method comprises the following steps: dispersing MoO3 powder in a mixed solution of monohydric alcohol and polyhydric alcohol, adding a triblock copolymer P123 stabilizer, carrying out microwave-assisted solvothermal reaction on the obtained suspension, centrifuging or filtering and washing to obtain molybdenum dioxide or molybdenum carbide; the obtained brown H0. 93MoO3 / C precursor microspheres are placed in an argon plasma environment, high-temperature calcination is carried out at the temperature of 500-600 DEG C for 30-60 min, and brown black MoO2 / C microspheres are obtained; or placing the H0. 93MoO3 / C precursor in a hydrogen-argon plasma environment, and calcining the H0. 93MoO3 / C precursor at a high temperature of 500-600 DEG C for 30-60 minutes to obtain the gray Mo2C / C microspheres. The MoO2 / C and Mo2C / C materials prepared in the invention have nanocrystalline characteristics and excellent electrochemical performance, and have good commercial application prospects as lithium battery negative electrode materials.

The invention discloses a preparation method of nearly spherical porous nano molybdenum powder. The method comprises the following steps: 1, decomposing molybdenum salt to obtain molybdenum trioxide; 2, performing hydrothermal reaction and carbonization on the organic carbon source to obtain carbon microspheres; 3, performing high-temperature carbonization to obtain partially graphitized microcrystalline carbon spheres; 4, molybdenum trioxide and microcrystalline carbon spheres are mixed in a high-dispersion mode, and a mixed material is obtained; 5, carrying out heat treatment on the mixed material to obtain nearly spherical molybdenum dioxide powder; and sixthly, hydrogen reduction is conducted, and the nearly-spherical porous nanometer molybdenum powder is obtained. Molybdenum salt is decomposed through rapid heating to avoid agglomeration of the molybdenum salt, microcrystalline carbon spheres which are good in dispersity and uniform in size are obtained through a hydrothermal method and high-temperature carbonization to serve as a nucleating agent for hydrogen reduction, the situation that subsequent agglomeration and growth of MoO2 and Mo powder are hindered in the chemical vapor transmission process in the hydrogen reduction process is avoided, and therefore the molybdenum-molybdenum-molybdenum composite material is obtained. And the chemical vapor transmission and growth process in the MoO2-Mo hydrogen reduction process is controlled in combination with gradient heating reduction, so that the dispersity of Mo particles and the size of a pore structure are ensured.

The present disclosure addresses the problem of providing a method for producing molybdenum trioxide having a lowered Sb content. A method for producing molybdenum trioxide according to the present invention includes: a step for mixing a raw material constituted of molybdenum compounds or hydrates thereof with chlorine, hydrogen chloride or a chloride; and a step for heating the obtained mixture at a temperature of 70°C or higher. Alternatively, a method for producing molybdenum trioxide according to the present invention includes: a step for mixing ammonium chloride with a raw material constituted of molybdenum trioxide, ammonium molybdate or hydrates of these; and a step for heating the obtained mixture at a temperature of 180ºC or higher.

The invention discloses a natural mineral-based wave-absorbing material synthesized based on a flash sintering process and a preparation method of the natural mineral-based wave-absorbing material, and relates to the technical field of wave-absorbing materials. Molybdenite powder and ferric oxide powder are fully and uniformly mixed in a mortar, and a mixed raw material is obtained; putting the mixed raw material into a corundum ring, connecting a platinum wire and fixing; placing the corundum ring in a muffle furnace, heating, connecting a platinum wire with a power supply, and carrying out flash burning; and naturally cooling to obtain a product, namely the MoS2 / Fe3O4 / MoO2 composite wave-absorbing material. Natural molybdenite is used as a raw material and is mixed with ferric oxide powder, a flash sintering process is adopted, and in the process, current passes through a sample to generate Joule heat, so that the temperature of the sample is rapidly increased, substance transmission is promoted, rapid reaction of the sample and the molybdenite is promoted, and rapid densification of the sample is caused, so that preparation of the MoS2 / Fe3O4 / MoO2 composite wave-absorbing material is realized. The production cost is reduced while the preparation efficiency is improved, and the environmental pollution is reduced.

This invention belongs to the field of aerogel technology, and relates to a silicon-based aerogel composite material, its preparation method, and its application. The preparation method of the silicon-based aerogel composite material is as follows: An active component precursor is added to a solvent and stirred until homogeneous, forming an active component precursor solution; ethanol and acid are added to the silicon-based precursor, stirred until homogeneous, and cooled to room temperature to form a silicon-based precursor solution; the active component precursor solution is added to form a precursor-silica sol mixed solution; an alkaline solution is added and stirred until homogeneous, forming a mixed solution; a stepped hot melt-gel treatment is performed, followed by standing to form a silicon-based composite wet gel; solvent replacement and drying yield silicon; the stepped hot melt-gel reaction includes 2-5 temperature stages, each lasting 10-80 minutes at 50-100°C. This invention employs a controllable stepped hot melt-gel process to obtain a silicon-based aerogel composite material with both high specific surface area and excellent mechanical properties.

To provide a novel graphene monoxide material that can be used in many applications such as electrochemical cells and methods of making the same.SOLUTION: Provided are a composition of graphene-based nanomaterials characterized by at least one area of one atomic layer of graphene monoxide, wherein at least a portion of oxygen molecules present in the graphene monoxide are incorporated into specific crystalline structural moieties, methods of making the same, electrodes in electrochemical devices incorporating the same, and compositions of lithium and graphene monoxide, the compositions containing material that result from cycling the electrodes.SELECTED DRAWING: Figure 1-1

The application relates to the technical field of molybdenum trioxide production, and particularly discloses a preparation method of high-purity molybdenum trioxide. The method comprises the following steps: preparing a complexing impurity removing agent by taking diatomite, citric acid, ethylenediaminetetraacetic acid disodium and tartaric acid as raw materials; dissolving industrial ammonium dimolybdate to obtain an ammonium molybdate solution, adding the impurity removing agent into the ammonium molybdate solution, complexing impurities under an acidic condition, and deeply removing the impurities through flocculation and precision filtration; adjusting the alkalinity of the filtrate, and cooling and crystallizing the filtrate to obtain high-purity ammonium molybdate; and finally performing program-controlled temperature calcination in an atmosphere with a specific oxygen content by using a quartz boat coated with a composite coating on the inner wall, so as to obtain high-purity molybdenum trioxide. The application combines multi-stage purification with an accurate calcination process, can efficiently remove impurities in raw materials, and has stable process flow; the obtained molybdenum trioxide product has high purity, good crystal morphology, good process stability and good industrialization prospect.

A composite product includes molybdenum disulfide particles and palladium particles, in which an average crystallite size of molybdenum disulfide included in the molybdenum disulfide particles determined from a peak of 2θ=14.4°±0.5° obtained by X ray diffraction measurement is 150 nm or less. A catalyst ink includes the composite product and a dispersing medium. A method for producing the composite product includes a step of mixing molybdenum disulfide particles and a palladium solution, in which an average crystallite size of molybdenum disulfide included in the molybdenum disulfide particles determined from a peak of 2θ=14.4°±0.5° obtained by X ray diffraction measurement is 150 nm or less.

This invention provides an ultrafine intermediate molybdenum oxide material and its preparation method. The method involves placing ammonium molybdate in a reaction vessel and heating it in a vacuum environment at 400℃–600℃ for at least 3 hours to obtain the ultrafine intermediate molybdenum oxide material. The reaction vessel is a sealed structure except for the exhaust end, which is equipped with a one-way gas flow valve. The Fisher particle size of the ultrafine intermediate molybdenum oxide material is 0.8–1.0 micrometers. The method uses a reaction vessel equipped with a one-way gas flow valve, preventing external air from entering during the roasting process while simultaneously allowing the exhaust of gases generated during decomposition, thus ensuring the purity of the obtained molybdenum oxide material. The process conditions are simple and easy to control, making it suitable for industrial production. This material, with its small particle size and high purity, has broad application prospects.

The invention relates to preparation and application of a MoNiCoFe multi-metal self-supporting electrocatalyst in the field of hydrogen production by electrocatalytic decomposition of water. Hydrogen energy serving as renewable energy has become an important research subject in global energy transformation. Water electrolysis hydrogen production is regarded as one of the most potential hydrogen production modes by means of efficient H2 output. Therefore, development of an electrocatalyst with high efficiency, long-term stability and low cost becomes a core problem of current electrocatalysis research. The invention relates to preparation and application of a MoNiCoFe multi-metal self-supporting electrocatalyst in the field of electrocatalytic hydrogen evolution. The invention aims to solve the problems that raw materials for synthesizing a high-performance electrocatalyst in the prior art are rare in reserve and high in price. The invention designs and develops a polyacid-derived dissimilar metal oxide Mo4O11 / NiCoFe-LDH (at) IF and a preparation method of the polyacid-derived dissimilar metal oxide. According to the adopted method, (NH4) 4 [NiMo6O24H6]. 6H2O is used as a precursor, cobalt nitrate is combined as an auxiliary cobalt source, foam iron is used as a conductive substrate, the self-supporting catalyst Mo4O11 / NiCoFe-LDH (at) IF with a hierarchical porous micron column structure is constructed through a hydrothermal method, and the self-supporting catalyst shows excellent electrocatalytic activity and stability in alkaline electrolyte.

This molybdenum trioxide powder has a specific surface area, as measured using the BET method, of 100 mｍ2 / g-500 m2 / g. The molybdenum trioxide powder may have a median diameter D50 of 5-1000 nm, as determined using a dynamic light scattering method. The molybdenum trioxide powder may have a purity of 99 mass% or more. The molybdenum trioxide powder may include molybdenum trioxide having a β crystal structure.

The invention discloses a method for separating positive and negative electrode powder. The method comprises the following steps: S1, crushing and drying a waste ternary lithium battery, and winnowing to remove a shell and a diaphragm to obtain a mixture; s2, calcining the mixture in an inert gas atmosphere, and then performing magnetic separation to separate magnetic substances from non-magnetic substances; s3, separating a magnetic substance by wet stripping to separate the positive electrode foil from the positive electrode powder; separating non-magnetic substances by wet stripping, so that the negative electrode foil is separated from the negative electrode powder; s4, dissolving the positive electrode powder in the solution A, adding nickel sulfate, cobalt sulfate and manganese sulfate, uniformly mixing to obtain a solution B, then uniformly mixing the solution B with a sodium carbonate aqueous solution, adjusting the pH value to 8-8.5 by using ammonia water, carrying out a hydrothermal reaction, and collecting a precipitate; uniformly mixing the precipitate with lithium carbonate and zirconium hydroxide, and performing primary sintering to obtain an intermediate material; and uniformly mixing the intermediate material with ammonium molybdate tetrahydrate, and carrying out secondary sintering to obtain the modified positive electrode material.

The application provides a method and application for reducing molybdenum trioxide to generate molybdenum dioxide or molybdenum carbide, which comprises the following steps: dispersing MoO3 powder in a mixed solution of monohydric alcohol and polyhydric alcohol, adding a triblock copolymer P123 stabilizer, and obtaining a suspension which is subjected to microwave-assisted solvothermal reaction, centrifugation or filtration and washing, and then brown H 0.93 The MoO3 / C precursor microspheres are placed in an argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain brown-black MoO2 / C microspheres; or the H 0.93 The MoO3 / C precursor is placed in a hydrogen-argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain gray Mo2C / C microspheres. The MoO2 / C and Mo2C / C materials prepared by the application have nanocrystalline characteristics and excellent electrochemical performance, and have a good commercial application prospect as negative electrode materials of lithium batteries.

The application provides a molybdenum trioxide extraction method, and belongs to the field of extraction metallurgy. The molybdenum trioxide extraction method provided by the application comprises the following steps: vacuum smelting a molybdenum-containing material to obtain sublimates, and cooling the sublimates to obtain the molybdenum trioxide; the molybdenum content in the molybdenum-containing material is 37.42-46.31 wt%, and the oxygen content is 30.74-38.13 wt%; the temperature of the vacuum smelting is 880-1200 DEG C, and the vacuum degree is 0.47-10 Pa; and the cooling rate of the cooling is 5-10 DEG C / min. The molybdenum trioxide is obtained by decomposing molybdate in the molybdenum-containing material through vacuum smelting, and the original molybdenum trioxide in the molybdenum-containing material sublimates under high-temperature conditions to obtain high-purity molybdenum trioxide, thereby effectively improving the extraction efficiency of the molybdenum trioxide; and the extraction method is simple, the low-grade molybdenum-containing material is used as the raw material, the extraction cost is lower, and the environment is not polluted.

A method for preparing an ordered cross-stacked metal oxide nanowire array is provided. The method includes the following steps: conducting synthesis by using an amphiphilic diblock copolymer as a structure directing agent, tetrahydrofuran (THF) as a solvent and polyoxometalates (POMs) as an inorganic precursor, where the diblock copolymer can interact with POMs via an electrostatic force to form a core-shell cylindrical micelle in the solvent, which self-assembles to form an ordered multilayer-crossed organic-inorganic composite nanostructure during an evaporation process; the template is removed by calcination in air, thereby obtaining ordered and crossed metal oxide nanowires with various elements doping. The nanowire array material has a high specific surface area, a high crystallinity, and realizes uniform doping of heteroatoms.

A molybdenum trioxide powder, which contains an aggregate of primary particles comprising a crystal structure of molybdenum trioxide, the crystal structure comprising α-crystals having an average crystallite size of 50 nm or less. The median particle diameter D50 of the primary particles, which is obtained by a dynamic light scattering method, is 2000 nm or less. 50 is 2000 nm or less.

The utility model discloses a molybdenum oxide segmented temperature control collecting device which comprises a shell, a preheating pipe, a condensing pipe, a tail gas pipe and a temperature control system, and the preheating pipe, the condensing pipe and the tail gas pipe are all wrapped by the shell. Insulating layers and electric heating wires are arranged between the preheating pipe and the corresponding inner wall of the shell, between the condensing pipe and the corresponding inner wall of the shell and between the tail gas pipe and the corresponding inner wall of the shell; the condensation pipe is divided into a main collection cavity and an auxiliary collection cavity through a partition plate, an airflow channel is formed in the partition plate, and an adjusting valve is arranged on the airflow channel; the preheating pipe is communicated with the main collecting cavity, and the tail gas pipe is communicated with the auxiliary collecting cavity. When the device works, on one hand, the temperature control system is arranged, so that the partition diversity of the temperature field of the condensation area is realized, and molybdenum oxide products with different crystal morphologies and purities can be obtained; and on the other hand, recycling is achieved through the multi-stage chambers, the steam flow speed can be adjusted through the adjusting valve, and the recycling rate and the material taking stability are improved.

The invention discloses a preparation method and application of a dimensionality-designable molybdenum disulfide / molybdenum dioxide heterojunction. According to the method, a one-step two-stage chemical vapor deposition strategy is adopted, and highly controllable synthesis of the molybdenum disulfide / molybdenum dioxide heterojunction is achieved. Compared with a traditional two-step chemical vapor deposition or mechanical stripping method, the method has the advantages that extra steps do not need to be introduced, and preparation of the wafer-level and high-quality molybdenum disulfide / molybdenum dioxide heterojunction can be achieved. Molybdenum disulfide / molybdenum dioxide heterojunctions with different morphologies can be accurately regulated and controlled by regulating and controlling the concentration of the metal source precursor, so that preparation of molybdenum disulfide / molybdenum dioxide heterojunctions with different dimensions is realized, and the requirements of diversified application scenes on heterojunction functionalization are met. Besides, experimental results show that the prepared heterojunction shows excellent electro-catalytic performance in the field of electro-catalysis, and important experimental basis and theoretical basis are provided for design of high-performance electro-catalysts.

The invention discloses a preparation method and application of a three-dimensional self-supporting rGO-MoO2-S. The three-dimensional self-supporting rGO-MoO2-S positive electrode material is composed of nitrogen-doped rGO, superfine MoO2 nanoparticles and sulfur, and has a high specific surface area, a porous structure and excellent electrochemical performance, and the preparation method comprises the following steps: dissolving MoCl5 in deionized water, adding ammonia water and a GO nanosheet dispersion, and stirring to obtain a mixed solution; after uniform stirring, GO-MoO2 hydrogel is prepared through a hydrothermal method; carrying out freeze drying and high-temperature calcination in a nitrogen atmosphere, so as to obtain self-supporting rGO-MoO2 aerogel; the rGO-MoO2-S positive electrode material is used as a sodium-sulfur battery positive electrode, the shuttle effect of NaPSs can be effectively inhibited from physical packaging and chemical adsorption double layers, the cycle stability and rate capability of the battery are improved, the self-supporting structure does not need additional binders or conductive additives, the actual energy density of the battery is further improved, and the preparation method is simple and easy to implement. The invention provides a high-performance positive electrode material for application of a room-temperature sodium-sulfur battery in the field of large-scale energy storage, and has important significance.

A molybdenum trioxide powder contains an aggregate of primary particles having a β crystal structure of molybdenum trioxide. The molybdenum trioxide powder has a MoO3 content ratio of 99.6% or more measured by X-ray fluorescence (XRF), and has an average particle diameter of the primary particles of 1 μm or less. A method for producing the above molybdenum trioxide powder includes vaporizing a molybdenum oxide precursor compound to form molybdenum trioxide vapor, and cooling the molybdenum trioxide vapor.

This invention discloses a method for preparing a nano-zinc sulfide composite material, comprising: (1) dissolving ammonium molybdate in deionized water, stirring evenly to form a 50 g / L solution, then sequentially adding zinc acetate and thiourea, wherein the mass ratio of ammonium molybdate to zinc acetate and thiourea is 2:1, and stirring thoroughly to obtain a mixed solution; (2) transferring the obtained mixed solution to a reaction vessel, reacting at a constant temperature of 160℃ for 12 h, and obtaining a solid powder after treatment; (3) heat-treating at 300-400℃ for 2 h to obtain the nano-zinc sulfide composite material. This invention synthesizes zinc sulfide nanomaterials with different sizes and morphologies, while molybdenum dioxide nanoparticles modify the surface of zinc sulfide. The two work synergistically to have heterogeneous structural characteristics that promote and accelerate electron transport. Using them as electrode materials for electrochemical detection of nicotine and the metabolite cotinine content in cigarettes shows potential application advantages.