91 results about "Molybdenum dioxide" patented technology

The invention relates to the technical field of nano material preparation, and provides a molybdenum powder preparation method and molybdenum powder.The molybdenum powder preparation method comprises the steps that original molybdenum trioxide is subjected to thermal shock treatment, and treated molybdenum trioxide is obtained; the defect of the treated molybdenum trioxide is higher than that of the original molybdenum trioxide; adding the treated molybdenum trioxide and a water-soluble carbon source into a solvent, and carrying out ultrasonic dispersion and ball milling treatment to obtain mixed slurry; dehydrating and drying the mixed slurry to obtain precursor powder of organic carbon coated molybdenum trioxide; performing inert atmosphere reduction treatment on the precursor powder to obtain molybdenum dioxide; carrying out gas reduction deoxidation treatment on the molybdenum dioxide to obtain molybdenum powder; and the particle size of the molybdenum powder is nanoscale. The method disclosed by the invention can be used for preparing the nano molybdenum powder with narrow particle size distribution.

The present invention relates to a process for producing molybdenum dioxide dichloride, which is a very efficient process that does not use hazardous chlorine gas and high reaction temperatures and enables the production of molybdenum dioxide dichloride in high yield without solvent.

The invention discloses a method for purifying electronic grade molybdenum dioxide dichloride, which comprises the following steps of: removing low-boiling-point substances by adopting a sublimation method, collecting sublimation gas of which the main component is a target product by adopting sublimation in a fixed temperature interval, then removing substances with different chemical properties and polarities by adopting a complexing and decomplexing method, and finally further removing impurities by sublimation to obtain the electronic grade molybdenum dioxide dichloride. And finally obtaining the electronic grade molybdenum dioxide dichloride with the purity not lower than 7N grade. The method has the characteristics of good purification effect, multi-method comprehensive impurity removal, industrial large-scale application, stable quality, high yield and simple and easy-to-separate impurity components.

The invention relates to the technical field of nano powder material preparation, in particular to a method for preparing molybdenum powder based on a spray granulation precursor and the molybdenum powder. The method for preparing the molybdenum powder comprises the steps that ammonium molybdate and a pore forming agent are dissolved in ultrapure water at the room temperature, and mixed slurry is obtained; carrying out spray granulation treatment on the mixed slurry to obtain composite powder particles containing the pore-forming agent and ammonium molybdate; the composite powder particles are placed in an oxygen-containing atmosphere to be roasted, and superfine nano molybdenum trioxide is obtained; placing the superfine nano molybdenum trioxide in a hydrogen atmosphere for primary reduction treatment to obtain superfine molybdenum dioxide powder; and the superfine molybdenum dioxide powder is subjected to second-stage reduction treatment, the superfine molybdenum powder is obtained, and the reduction conditions of the first-stage reduction treatment and the second-stage reduction treatment are different. According to the preparation method, the superfine molybdenum powder with good uniformity and dispersity can be prepared.

The invention relates to the technical field of nano powder material preparation, in particular to a method for preparing molybdenum powder with controllable granularity and the molybdenum powder. The method for preparing the molybdenum powder with the controllable granularity comprises the steps that molybdenum salt and a pore forming agent are dissolved in water at the room temperature, and a mixed solution is obtained; drying the mixed solution to obtain a nano mixture of molybdenum salt coated with a pore-forming agent; roasting the nano mixture in an oxygen-containing atmosphere to obtain superfine molybdenum trioxide powder; the molybdenum trioxide powder is subjected to first-stage hydrogen reduction treatment, and superfine molybdenum dioxide powder without preferred orientation is obtained by adjusting the hydrogen dew point and the temperature field in the reduction process; and carrying out two-stage hydrogen reduction treatment on the superfine molybdenum dioxide powder to obtain molybdenum powder, and grinding and dispersing the molybdenum powder to obtain the superfine molybdenum powder. According to the preparation method, the superfine molybdenum powder with good uniformity and dispersity and controllable granularity can be prepared.

The invention relates to the technical field of sodium / lithium ion battery negative electrode materials, and discloses a molybdenum-based negative electrode material and a preparation method and application thereof.The molybdenum-based negative electrode material comprises a nitrogen and sulfur co-doped carbon nano short rod, and the carbon nano short rod is filled with a core-shell type molybdenum-based nano roll; the core-shell type molybdenum-based nano roll comprises a molybdenum dioxide core and a molybdenum disulfide shell layer with a bent structure, and the number of the molybdenum disulfide layers is 12-35. The molybdenum-based negative electrode material provided by the invention is composed of a carbon nano short rod coating layer and a core-shell type MoO2-MoS2 nano roll filled in the carbon nano short rod coating layer; the MoO2-MoS2 nano-roll is obtained by homologous conversion of MoO3 nano short rods and has unique core-shell structure characteristics, and the MoO2-MoS2 nano-roll and the MoO3 nano short rods form a large number of heterogeneous interfaces to provide abundant reaction active sites for storing sodium ions or lithium ions and accelerating electrochemical reaction kinetics; according to the present invention, the MoS2 shell layer has the bending structure characteristic, and the number of the MoS2 layers is controlled to 12-35 through the confinement pyrolysis temperature and the sulfur-containing initiator consumption so as to obtain the excellent sodium / lithium storage performance, and the excellent rate performance and the excellent cycle stability are provided when the MoS2 / lithium battery is used;

The present invention provides a method for preparing molybdenum dioxide dichloride based on a molybdenum-containing solution. The technical scheme comprises the following steps: adjusting the pH of the molybdenum-containing solution to 7.5-9.0 using a pH regulator to obtain a treated molybdenum-containing solution; adding a calcium source to the treated molybdenum-containing solution at a molar ratio of molybdenum to calcium source of 1:1.5-2.0, stirring, and solid-liquid separation to obtain a molybdenum-containing precipitate; mixing the molybdenum-containing precipitate with a chlorinating agent at a molar ratio of molybdenum to chlorinating agent of 1:1-4 to obtain a chlorination reaction product; placing the chlorination reaction product in a reaction apparatus, introducing a protective atmosphere, and reacting at 150-180°C for 1-3 hours to produce molybdenum dioxide dichloride gas; and condensing the molybdenum dioxide dichloride gas at 0-50°C to obtain molybdenum dioxide dichloride based on the molybdenum-containing solution. This method features a simple process, environmental friendliness, high safety, and low energy consumption. The prepared molybdenum dioxide dichloride based on the molybdenum-containing solution is of high purity.

Methods for preparing catalysts for oxidative dehydrogenation (ODH) of alkanes such as ethane are provided. An exemplary method includes forming a slurry including metal oxides; one or more of a bismuth compound, an antimony compound, and a tellurium compound; a reducing agent; and water; and heating the slurry to form the catalyst. The metal oxides include an oxide of molybdenum and an oxide of vanadium. The bismuth compound includes bismuth oxide, bismuth hydroxide, or a bismuth carbonate. The antimony compound includes an oxide of antimony, an antimony acetate, or an antimony ethoxide. The tellurium compound includes tellurium dioxide. The reducing agent includes molybdenum dioxide and may further include vanadium dioxide. The methods use all inorganic reagents, with no build up COx pressure observed during the hydrothermal synthesis.

The invention discloses fine-grain molybdenum-lanthanum alloy molybdenum powder and a preparation method thereof.The preparation method specifically comprises the steps that rare earth lanthanum salt hydrate and deionized purified water are put into a stirring tank to be mixed and stirred, and a rare earth lanthanum salt solution is obtained; preparing doped molybdenum dioxide by using a rare earth lanthanum salt solution and MoO2; and the sample doped with molybdenum dioxide is put into a high-temperature reduction furnace, hydrogen is used for reduction, screening is conducted, and the molybdenum-lanthanum alloy molybdenum powder is obtained. According to the preparation method of the fine-grain molybdenum-lanthanum alloy molybdenum powder, molybdenum dioxide serves as a raw material, the molybdenum-lanthanum alloy molybdenum powder is prepared by adopting soluble rare earth lanthanum salt solution to atomize doped molybdenum dioxide and adopting hydrogen to reduce the doped molybdenum dioxide, La2O3 is dispersed and evenly distributed among fine-grain molybdenum-lanthanum alloy molybdenum powder grains, sintered molybdenum-lanthanum alloy is of a compact and even fine-grain structure, and therefore the fine-grain molybdenum-lanthanum alloy molybdenum powder is obtained. And the plastic-brittle transition temperature of the processed molybdenum metal is reduced, and the toughness and strength of the molybdenum-lanthanum alloy are improved.

The invention discloses a platinum-nickel loaded molybdenum carbide / molybdenum dioxide nano composite material and a preparation method and application thereof.The platinum-nickel loaded molybdenum carbide / molybdenum dioxide nano composite material is prepared by the steps that firstly, metal molybdenum salt and a coordination agent serve as raw materials, a Mo2C / MoO2 substrate material containing heterojunctions is prepared, then PtNi is loaded on the Mo2C / MoO2 substrate material, and the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nano composite material is prepared. Wherein the PtNi alloy is well anchored by the MoO2 / Mo2C nano material carrier, the catalytic stability of the material is further improved, and the reactivity of active sites can be enhanced by the electron coupling and interface synergistic effect provided by a heterogeneous interface, so that the catalytic performance of the material can be developed to the greatest extent; meanwhile, the application cost of hydrogen production under the acidic condition is further reduced. Experimental results show that the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nano composite material has the advantages of high catalytic activity, excellent stability and the like when being used as a hydrogen production electrocatalyst of an acidic electrolyte, so that the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nano composite material has a wide application prospect.

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.

A display device includes a substrate; an anode electrode disposed on the substrate; a first anti-contact layer disposed on the anode electrode and including molybdenum trioxide (MoO3); a second anti-contact layer disposed on the first anti-contact layer and including molybdenum dioxide (MoO2); and a pixel-defining layer disposed on the second anti-contact layer, wherein the first anti-contact layer includes a first opening, wherein the second anti-contact layer includes a second opening, wherein the pixel-defining layer includes a third opening, and wherein the first opening, the second opening and the third opening overlap one another and expose the anode electrode.

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 invention provides a novel method for preparing molybdenum dioxide dichloride, belonging to the technical field of molybdenum dioxide dichloride. The method uses molybdenum trichloride, activated carbon, and chlorine as reaction raw materials. The molybdenum trichloride and activated carbon are mixed in a certain proportion, placed in a tubular reactor, heated to a certain temperature, and then an excess of dry chlorine is introduced to react to produce molybdenum dioxide dichloride gas. This gas is collected in a cooling chamber to obtain molybdenum dioxide dichloride solid. The crude product is then sublimated and purified to ultimately obtain a high-purity molybdenum dioxide dichloride product. This method has a high yield, improves raw material utilization and product yield, reduces production costs, and is conducive to industrial production.

The application discloses a method for removing organic pollutants by using molybdenum dioxide to promote activated periodate, and comprises the following steps: adding molybdenum dioxide, ferric salt and periodate into wastewater containing organic pollutants, and then performing catalytic degradation reaction to remove the organic pollutants in the wastewater. In the method, molybdenum dioxide is introduced into the homogeneous ferric / periodate system, and serves as an electron donor and mediator of a Fenton-like reaction. The molybdenum dioxide can not only accelerate the Fe 3+ / Fe 2+ cycle rate and promote the activation of the periodate, but also promote the generation of high-valence iron (Fe(IV)) in the system, form a non-radical pathway dominated oxidation mechanism, promote the degradation reaction to be more rapid and intense, and finally realize the efficient degradation of the organic pollutants. The method has the advantages of rapid degradation rate, good reusability, simple process, convenient operation and environmental friendliness, and can be widely used in the treatment of organic pollutant wastewater.

The present invention relates to a capacitor electrode material, which is a component of a next generation DRAM, and a process for formation and deposition of the electrode material, and a method for manufacturing a thin film of tin-doped molybdenum dioxide, according to an embodiment of the present invention, comprises: a first step of forming molybdenum trioxide (MoO3) by injecting a molybdenum source and ozone (O3) reaction gas onto the surface of a substrate; a second step of forming an atomic layer by doping tin oxide (SnOx) on the surface of the formed molybdenum trioxide (MoO3); and a step of forming a thin film of tin-doped molybdenum dioxide in a rutile phase from the formed atomic layer by repeating the first step or the second step.

The invention relates to a graphene-coated molybdenum dioxide nanorod composite material as well as a preparation method and application thereof. The composite material is of a core-shell structure and takes a molybdenum dioxide nanorod as a core and a graphene layer as a shell; the graphene layer is formed by high-temperature carbonization of polyaniline, and the thickness of the graphene layer is 10-80 nm. The preparation method comprises the following steps: dissolving a molybdenum source in a nitric acid aqueous solution for hydrothermal reaction to prepare a molybdenum trioxide nanorod precursor; dispersing the molybdenum trioxide nanorod precursor in an acidic solution, sequentially adding aniline and ammonium persulfate under a stirring condition, and reacting to obtain a polyaniline / molybdenum trioxide composite precursor; and drying the composite precursor, and carrying out high-temperature calcination to obtain the graphene-coated molybdenum dioxide nanorod composite material. Compared with the prior art, the composite material has the high conductivity of graphene and the chemical activity of molybdenum dioxide, and shows excellent removal efficiency and cycling stability on lead ions in the capacitive deionization process.

The present invention relates to the technical field of metal additive manufacturing, and discloses a method for preparing molybdenum-rhenium alloy powder suitable for 3D printing. The method specifically comprises the following steps: step 1, weighing raw materials ammonium rhenate and molybdenum dioxide to prepare a slurry; step 2, spray drying and granulation to prepare spherical precursor granules; step 3, calcination and hydrogen reduction to prepare molybdenum-rhenium alloy intermediate powder; step 4, plasma spheroidization treatment to prepare spherical molybdenum-rhenium alloy powder. The present invention performs hydrogen reduction on the spray-dried precursor granules and can achieve a sintering effect. The intermediate powder after reduction retains the spherical morphology of the precursor and improves the cohesive strength. At the same time, the interior of the particles maintains a loose and porous structure, and can achieve stable powder feeding and improve heat energy absorption efficiency in a plasma torch environment. In actual production applications, it can effectively reduce energy consumption, improve spheroidization efficiency and sphericity.

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 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.

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.

The present invention discloses a catalytic material based on molybdenum dioxide for degrading sulfur hexafluoride in an air atmosphere, which relates to the technical field of catalytic materials. The catalytic material is characterized in that: the catalytic material uses molybdenum dioxide as the active site center and uses one or more of silicon carbide and silicon dioxide as a carrier. The molybdenum dioxide material is used for catalytic degradation of sulfur hexafluoride in an air atmosphere. The MoO 2 Based on MoO 2 As the active site center, one or more of silicon carbide and silicon dioxide materials are used as carriers and can be prepared by a simple physical grinding method. No sintering is required, the process is simple, the processing cost is low, and it is suitable for large-scale production.

The invention discloses a method for preparing a molybdenum dioxide-molybdenum carbide heterostructure material through an in-situ carbonization method and application of the molybdenum dioxide-molybdenum carbide heterostructure material. A molybdenum source and dopamine hydrochloride are self-assembled in a trihydroxymethyl aminomethane buffer solution with the pH being 8.5 to form a precursor, after centrifugation, cleaning and drying, gradient heating carbonization is conducted in an inert atmosphere, and the molybdenum dioxide-molybdenum carbide heterostructure material is obtained. Molybdenum dioxide and molybdenum carbide in the obtained material are tightly compounded in a nanocrystalline form to form a hierarchical porous structure, the material can be used as a multifunctional modification layer of a polypropylene (PP) diaphragm in a lithium-sulfur battery, and the specific structure and interface electron enhancement effect of the material are utilized to improve the performance of the lithium-sulfur battery. The adsorption and catalytic conversion kinetics of the lithium polysulfide intermediate can be effectively improved, so that the comprehensive electrochemical performance of the lithium-sulfur battery is improved. The method is simple in process and low in cost, and a new strategy is provided for design of a high-performance energy storage material.

The preparation technology comprises the steps that molybdenum dioxide powder, Re powder, Ti powder, C powder and Al powder are subjected to ball milling and mixing to obtain precursor molybdenum-rhenium composite powder, molybdenum-rhenium alloy composite powder is obtained through two-stage hydrogen reduction, then high-temperature large-deformation rotary swaging is conducted after cold isostatic pressing and pressureless sintering are conducted, and the molybdenum-rhenium alloy is obtained. And finally, the high-temperature-resistant molybdenum-rhenium alloy with high-density dislocation is obtained. The dislocation density of an alloy matrix is increased by introducing a secondary phase, the recrystallization temperature of the molybdenum-rhenium alloy is increased, ultrahigh-temperature large-deformation rotary swaging of the molybdenum-rhenium alloy is achieved, high-density dislocation is further introduced through high-temperature large-deformation rotary swaging, the high-temperature tensile strength of the molybdenum-rhenium alloy is improved, and meanwhile the plasticity and toughness of the molybdenum-rhenium alloy are improved; and a wider application prospect is provided for application of the molybdenum-rhenium alloy in a more extreme environment.

The invention relates to a method for purifying high-purity molybdenum dioxide dichloride, which comprises the following steps: S1, adding a raw material molybdenum dioxide dichloride into sublimation equipment under the protection of inert gas or nitrogen, arranging a filter screen and a small pore plate between a sublimation end and a receiving end, and vacuumizing the sublimation equipment; s2, raising the temperature of the sublimation equipment to 150-170 DEG C, the temperature of a high-boiling-point region to 120-140 DEG C, the temperature of a product region to 100-120 DEG C and the temperature of a low-boiling-point region to 80-100 DEG C, and collecting a product molybdenum dioxide dichloride in the product region; and S3, sampling the high-purity molybdenum dichloride collected in the step S2, and repeating the operation for sublimation for multiple times to finally obtain a high-purity molybdenum dichloride product. According to the method, the content of inorganic metal elements such as aluminum, iron and titanium in the dichloromolybdenum dioxide is remarkably reduced, and small-particle-size powder particles are prepared and serve as a molybdenum-containing film precursor, so that the production requirement is met.

This invention discloses a method for extracting molybdenum from molybdenum oxide raw materials, comprising: mixing the molybdenum oxide raw materials with a certain proportion of leaching agent for leaching to obtain a first leaching solution for later use; removing impurities from the first leaching solution through resin or extractant to obtain a molybdenum-containing purified solution; adding a control agent to the molybdenum-containing purified solution to obtain a precursor solution; and placing the precursor solution in an autoclave for heating and decomposition to obtain the final product. The process of this invention can prepare molybdenum dioxide products in a short time, with simple steps and low economic cost, and avoids the introduction of ammonia nitrogen reagents throughout the process, thus preventing the generation of ammonia nitrogen waste pollutants. The molybdenum leaching rate during the leaching process and the molybdenum precipitation rate during the product preparation process of this invention exceed 99.5%.

The invention discloses an acid and alkali resistant composite material and a preparation method and application thereof in solar photo-thermal water evaporation, and belongs to the technical field of photo-thermal conversion materials, the key point of the technical scheme is that the preparation method of the acid and alkali resistant composite material comprises the following steps: S1, mixing pure water, ethanol and isopropanol to obtain a mixed solvent; s2, molybdenum acetylacetonate is dissolved in a mixed solvent to obtain a mixed solution; s3, the mixed solution and a hydrophilic PTFE film are mixed and then heated for 8-12 h at the temperature of 180-220 DEG C, and the MoO2 / PTFE composite material is prepared, molybdenum dioxide balls grow on the hydrophilic PTFE film through a solvothermal method, the water evaporation rate of the composite material can be kept stable in the severe environment (acidic, alkaline or high-salt), and therefore the composite material shows excellent stability and durability, and the composite material can be used for preparing the composite material. In addition, the used materials are low in price, the manufacturing process is simple, and popularization is easy.

The present invention provides a composite containing molybdenum disulfide and molybdenum trioxide, the molybdenum disulfide containing a 3R crystal structure, and the content ratio of a molybdenum trioxide equivalent value (B) calculated from the molybdenum content determined by XRF analysis of the composite with respect to the total mass of the composite being 5-90 mass%. The invention provides a catalyst ink which comprises the composite and a solvent. Also provided is a method for producing the composite, which comprises a firing step in which molybdenum trioxide is heated at a temperature of 400 DEG C or less in the presence of a sulfur source.

The application belongs to the technical field of bulletproof ceramic preparation, and provides a boron carbide bulletproof ceramic material and a preparation method thereof; first, molybdenum trioxide is subjected to reduction treatment in a hydrogen atmosphere to prepare reduced molybdenum dioxide; second, boron carbide, the reduced molybdenum dioxide and an additive in a specific proportion are mixed with a solvent, uniformly mixed through a ball milling process, and then subjected to vacuum drying and sieving treatment to prepare a uniform mixed powder; the mixed powder is subjected to unidirectional pressure cold pressing preforming, and the green body is further improved in density through cold isostatic pressing; the green body is subjected to gradient temperature sintering, sequentially experiences a reduction activation stage and a densification stage, realizes a high densification structure of the ceramic material, and finally, the sintered body is subjected to hot isostatic pressing treatment, further optimizes the internal structure of the material, improves the density and mechanical properties, and is suitable for the field of bulletproof materials.

The embodiment of the present application relates to a kind of molybdenum disulfide coated lithium lanthanum zirconium oxygen composite solid electrolyte material and its preparation method.The preparation method includes: ammonium tetrathiomolybdate is dissolved in pure water and dissolved, to obtain ammonium tetrathiomolybdate solution;Lithium lanthanum zirconium oxygen solid electrolyte is added to ammonium tetrathiomolybdate solution, and slurry is prepared by ultrasonic dispersion and stirring;The slurry is spray dried into dry powder;The powder is heat treated in the atmosphere of hydrogen mixed protective gas, to obtain molybdenum dioxide coated lithium lanthanum zirconium oxygen composite solid electrolyte material.