478 results about "Molybdenum oxide" patented technology

The invention belongs to the technical field of catalysts, and particularly relates to a supported Co-based catalyst with a nano molybdenum carbide auxiliary as well as a preparation method and application of the supported Co-based catalyst. The preparation method comprises the following steps: depositing molybdenum oxide on the surface of a carrier material by adopting an atomic layer deposition method, then carrying out carburizing treatment to obtain a molybdenum carbide catalyst, depositing cobalt oxide on the surface of the molybdenum carbide catalyst by adopting the atomic layer deposition method, and then carrying out reduction treatment to obtain the supported cobalt-based catalyst with the nano molybdenum carbide assistant. According to the preparation method provided by the invention, the size of molybdenum carbide and the dispersity and valence state of cobalt are controlled by regulating and controlling the deposition times of molybdenum oxide, and the prepared catalyst has excellent catalytic activity and stability in the hydroformylation reaction of long-chain olefin with the carbon atom number being greater than or equal to 5.

The application provides a method for grading diesel deep hydrodesulfurization catalysts, which comprises the following steps: loading catalysts containing AlPO4-5 phosphorus aluminum molecular sieves and catalysts containing ETS-10 titanium silicon molecular sieves in the upper and lower parts of a fixed bed hydrogenation reactor respectively according to a loading mass ratio of 1:3-3:1, so that diesel is subjected to hydrodesulfurization reaction through catalysts containing AlPO4-5 phosphorus aluminum molecular sieves first and then through catalysts containing ETS-10 titanium silicon molecular sieves; the carrier of the catalysts containing AlPO4-5 phosphorus aluminum molecular sieves comprises AlPO4-5 phosphorus aluminum molecular sieves and aluminum oxide powder, the carrier of the catalysts containing ETS-10 titanium silicon molecular sieves comprises ETS-10 titanium silicon molecular sieves and aluminum oxide powder, and the active components of the two kinds of catalysts respectively comprise a combination of two or three of nickel oxide, molybdenum oxide and cobalt oxide. The sulfur content of the hydrogenated diesel obtained through the method can be as low as 10 μg / g or below.

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 relates to superfine molybdenum powder and a converter reduction preparation method thereof, belongs to the technical field of rare metal powder metallurgy, and solves the problems that the existing molybdenum powder preparation process is easy to cause hardening and agglomeration, the appearance granularity of the molybdenum powder cannot be controlled, the reduction process is complicated, the efficiency is low, the energy consumption is high and the cost is high. The method comprises the following steps: (1) preparing molybdenum oxide powder; (2) adding the molybdenum oxide into a converter, and introducing hydrogen for reduction; wherein the molybdenum oxide powder is nanoscale molybdenum oxide. The contact area between the adopted nanoscale molybdenum oxide powder raw material and the reducing gas is large, the converter rotates to drive the raw material powder to flow, full contact between the raw material powder and the reducing gas is promoted, hardening and agglomeration are inhibited, the reduction efficiency is improved, one-step reduction is achieved, the morphology is easy to control, and no waste gas is generated; compared with a traditional static pusher furnace, the closed dynamic converter has the advantages that reduction hydrogen escape is greatly reduced, safety is improved, energy consumption is reduced, and the use amount of hydrogen is greatly reduced.

The invention relates to the technical field of alloy processing, and discloses a high-performance corrosion-resistant nickel-based alloy plate and a preparation method thereof, and the method comprises the following steps: raw material preparation, smelting treatment, casting treatment, hot rolling treatment, solution treatment, aging treatment and surface passivation treatment. According to the invention, when a composite acid system is adopted for passivation treatment, the concentration of chromium / molybdenum atoms in a passivation film is optimized and balanced due to the specific ratio of nitric acid to chromic acid, a chromium oxide provides a compact passivation barrier, and a molybdenum oxide endows the film layer with a self-repairing characteristic to synergistically inhibit pitting nucleation; meanwhile, nano titanium dioxide particles pretreated by silane are embedded into the passivation film in situ under the action of ultrasonic oscillation, organic pollutants adsorbed on a film layer can be decomposed by the photocatalytic characteristic of the nano titanium dioxide particles, the local corrosion effect of a battery caused by dirt coverage is avoided, and the performance of the battery is improved through double upgrading of components and the structure of the passivation film. And the alloy plate has excellent pitting corrosion resistance and fouling resistance in a chloride ion-containing medium.

The present invention relates to the technical field of heavy oil hydrodesulfurization, and discloses a hydrodesulfurization catalyst preparation process, which comprises: adding deionized water, a nickel source, a molybdenum source and a dispersant into a reaction container, stirring to obtain a metal solution, pouring into a container filled with gamma-Al2O3, impregnating, drying, and roasting to obtain the hydrodesulfurization catalyst. The dispersing agent contains a large number of nitrogen atoms and a plurality of carboxyl groups and hydroxyl groups, has very strong coordination chelation performance on nickel and molybdenum, improves the dispersity of nickel and molybdenum precursors, enables the nickel and molybdenum precursors to be uniformly impregnated into a gamma-Al2O3 carrier, and nickel oxide and molybdenum oxide are uniformly distributed in the gamma-Al2O3 carrier after calcination, so that the nickel and molybdenum oxide-modified gamma-Al2O3 composite material is prepared. The obtained hydrodesulfurization catalyst can expose more nickel-molybdenum catalytic active centers, effectively catalyzes and removes sulfur-containing substances such as thiophenes in straight-run diesel oil, shows a higher desulfurization rate, and improves the quality of oil products.

The invention relates to the technical field of superfine molybdenum powder preparation, in particular to a preparation device and method for low-oxygen superfine molybdenum powder. The specific preparation device comprises a sublimation bin, a reaction area and a gas-solid separation bin which are sequentially connected, the reaction zone comprises a preheating zone, a reduction zone and a conversion zone; a part of the hydrogen pipeline and a part of the carbon monoxide pipeline are arranged in the preheating area; one end of the hydrogen pipeline extends to the reduction area and is used for providing preheated hydrogen and carrying out gas-phase reduction reaction on the preheated hydrogen and the gas-phase MoO3 subjected to heat preservation; one end of the carbon monoxide pipeline extends to the conversion area and is used for providing preheated carbon monoxide and reacting with water vapor to complete primary water vapor conversion; meanwhile, partial carbon monoxide is subjected to a disproportionation reaction to generate micro carbon powder, and the micro carbon powder and water vapor are subjected to a water gas reaction to complete secondary water vapor conversion. The problem that the oxygen content of existing superfine molybdenum powder prepared through gas-phase molybdenum trioxide reduction is too high is solved.

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 belongs to the technical field of polymer composite materials, and particularly relates to an efficient flame-retardant low-toxic-gas-release silicone rubber composite material and a preparation method thereof. The high-efficiency flame-retardant low-toxic-gas-release silicone rubber composite material comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber; 10 to 20 parts of ZIF-67 modified by polysiloxane; 5-10 parts of modified nano molybdenum oxide; 5 to 10 parts of melamine cyanurate; 40 to 50 parts of mesoporous SiO2 aerogel; 1-3 parts of hydroxyl silicone oil; 0.5 to 1.5 parts of a vulcanizing agent; and 0-5 parts of an auxiliary agent. The flame-retardant and smoke-suppression performance of the silicone rubber composite material is remarkably improved through material technology innovation, and meanwhile, the mechanical property and the high temperature resistance are improved.

The invention provides a Ni-molybdenum oxide / Nb2O5 nano composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst precursor is prepared by adopting an excessive impregnation method, then the Ni-molybdenum oxide / Nb2O5 nano-composite catalyst is prepared by adopting a hydrogen reduction treatment method, active components in the catalyst are uniformly loaded, and the catalyst has excellent self-hydrogen hydrothermal catalytic performance. The Ni-molybdenum oxide / Nb2O5 nano composite catalyst prepared by the invention can minimize the dissociation energy of a C-O bond, promote the breakage of the C-O bond, enable the reaction to be carried out in a forward direction, and realize high-value conversion of guaiacol to catechol under mild reaction conditions without exogenous hydrogen.

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.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

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.

Molybdenum(0) coordination complexes comprising ligands which each coordinate to the metal center by nitrogen or phosphorous are described. Methods for depositing molybdenum-containing films on a substrate are described. The substrate is exposed to a molybdenum precursor and a reactant to form the molybdenum-containing film (e.g., elemental molybdenum, molybdenum oxide, molybdenum carbide, molybdenum silicide, molybdenum nitride). The exposures can be sequential or simultaneous.

The invention discloses an industrial flue gas denitration filter bag and a preparation method thereof, and relates to the technical field of flue gas denitration. The industrial flue gas denitration filter bag comprises PTFE (Polytetrafluoroethylene) fibers, PPS (Polyphenylene Sulfide) fibers, PI (Polyimide) fibers and PTFE loaded fibers. Wherein the PTFE loaded fiber is a PTFE fiber layer loaded with a modified molecular sieve catalyst; the modified molecular sieve catalyst takes a molecular sieve coated with modified nanorods as a carrier, a vanadium-titanium composite oxide as an active catalytic component and a cerium-titanium composite oxide as a co-catalytic component; the modified nanorod is a molybdenum-tungsten composite oxide modified cerium dioxide nanorod. By introducing the modified molecular sieve catalyst prepared from cerium dioxide nanorods, lanthanum nitrate, molybdenum trioxide and other raw materials, the denitration capacity, the ammonia escape prevention capacity, the sulfur poisoning resistance, the hydrothermal stability and the working life are further improved, and an active temperature window is widened. Therefore, the method has a wider application prospect.

Methods are provided for etching molybdenum in a wet ALE process. The methods disclosed herein use a wide variety of techniques and wet etch chemistries to oxidize a molybdenum surface and form a self-limiting, molybdenum oxide passivation layer in a surface modification step of the wet ALE process. In the wet ALE processes and methods disclosed herein, self-limiting behavior is provided in the oxidation step by adding a polydentate ligand to an aqueous oxidizing solution. The polydentate ligand reacts with and binds to the oxidized molybdenum surface to form a stable, ligand-molybdenum oxide complex, which is insoluble within the aqueous oxidizing solution. The insolubility of the ligand-molybdenum complex in the aqueous oxidizing solution provides self-limiting behavior in the oxidation step. After forming the molybdenum oxide passivation layer, the passivation layer is selectively removed in a dissolution step of the wet ALE process to etch the molybdenum surface.

A production process of electronic grade molybdenum dichloride dioxide comprises the following steps: S1, pretreatment: contacting molybdenum trioxide with a dilute acid solution at a low temperature for pickling to remove alkaline impurities and soluble metal impurities adsorbed on the surface, and drying for later use after washing; s2, wet synthesis: in an inert gas atmosphere, reacting the molybdenum trioxide subjected to acid pickling in the step S1 with concentrated hydrochloric acid of which the mass is 4-5 times of that of the molybdenum trioxide at 80-100 DEG C, and after the reaction is finished, evaporating and concentrating in a high-temperature chlorine atmosphere to generate a crude product of dichloromolybdenum dioxide; s3, primary sublimation purification; s4, complexing and decomplexing purification; and S5, secondary sublimation purification: using a quartz sublimation tower to carry out vacuum sublimation on the secondary decomplexed molybdenum dichloride obtained in the step S34, and collecting sublimation condensate to obtain the electronic grade molybdenum dichloride. The final product purity of the production process is greater than or equal to 6N, and the process can be used for large-scale production.

This invention belongs to the field of single-crystal material preparation technology, specifically relating to a molybdenum trioxide single-crystal ribbon and its preparation method. During the calcination of a molybdenum source, the ribbon is contacted with a structure-directing agent composed of alkali metal salts and metals other than molybdenum in Group 6, or alkaline earth metal salts and metals other than molybdenum in Group 6. After cooling, the molybdenum trioxide single-crystal ribbon is obtained. This invention does not require complex template guidance, the structure-directing agent is simple and readily available, and it enables molybdenum trioxide crystals to grow along a specific direction, resulting in a highly crystalline molybdenum trioxide single-crystal ribbon.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

The invention discloses a method for improving the molybdenum yield in the direct alloying process of molybdenum oxide, which comprises the following steps of: 1, adjusting the lance position of an oxygen lance, and detecting a sonar slagging curve and a CO curve: judging the foaming performance of slag by combining sonar slagging and a furnace gas CO curve in the smelting process; step 2, molybdenum oxide is added, bottom blowing is enhanced, and the lance position of an oxygen lance is reduced; and step 3, the lance position is further reduced, the lance position is reduced to 0.1-0.3 m below the basic lance position, the decarburization speed is increased to 0.3% / min or above, volatilization of molybdenum oxide is inhibited through slag foaming and high CaO content, and the yield of molybdenum is increased. The slag composition and foaming performance are controlled by adjusting the lance position of the oxygen lance, the slag foaming performance is judged by combining sonar slagging and a furnace gas CO curve, a molybdenum oxide raw material is added when the slag foaming performance is good, and meanwhile volatilization of molybdenum oxide is inhibited through slag foaming and high CaO content. The sublimation of molybdenum oxide is effectively prevented, the yield of metal molybdenum can reach 95% or above, and the production cost of the molybdenum-containing steel grade is reduced.

The invention relates to application of a molybdenum-based electrocatalyst cathode in electrocatalytic degradation of antibiotics in wastewater. According to the cathode, foamed nickel serves as a substrate, and carbon-doped oxygen vacancy-enriched molybdenum oxide C-MoO2-X is loaded on the surface of the substrate. The preparation method of the electrocatalyst is simple to operate, low in cost and environment-friendly, and the NF net structure with excellent performance can effectively avoid MoO2 agglomeration in the calcination process. According to the preparation method, pressure stress is generated by utilizing lattice shrinkage after carbon doping, adjacent O atoms are forced to be separated from lattices, stable oxygen vacancies are formed in MoO2 lattices through electron reconstruction, electron transfer is enhanced, strong Mo-C bonds are formed, Mo atoms are stabilized, oxidation dissolution of the Mo atoms is inhibited, the oxygen adsorption behavior is optimized, and an activation energy barrier from O2 to H2O2 to O2 is reduced. According to the invention, by designing a carbon-doped pyrolysis process, the selective generation of O2 of more than 90% is realized. The research provides a new design scheme for preparing an efficient and cheap non-noble metal ORR catalyst.

The invention relates to the technical field of hydrodesulfurization catalysts, and discloses a molecular sieve hydrodesulfurization catalyst and a preparation method thereof.Active Si-Cl bonds of maleate methyl dichlorosilane react with hydroxyl in an MCM-41 molecular sieve, then hydrolysis is conducted through sodium hydroxide, and therefore a large number of carboxyl groups are grafted in the molecular sieve; carboxyl can form a strong coordination effect with metal ions such as nickel and the like, so that nickel and molybdenum are uniformly adsorbed into a matrix of the molecular sieve, a nickel-molybdenum oxide catalytic active center is uniformly generated in the molecular sieve through high-temperature roasting, catalytic sites are not easy to agglomerate, the dispersity is good, and the catalytic activity is stable. The catalyst can effectively perform hydrogenation reaction on sulfur-containing substances such as thiophenes in straight-run diesel oil, and has higher desulfurization rate. The catalyst has good practical application in the aspects of oil hydrodesulfurization catalysis and the like.

The invention provides a boron-doped nickel-molybdenum hydrogen evolution electrode and a preparation method thereof, and relates to the field of electrolytic hydrogen production. The electrode is a boron-doped nickel-molybdenum catalyst (NiMoB) which takes a nickel net as a conductive substrate and grows on a nickel metal net framework in situ; the preparation method comprises the following steps: firstly, carrying out hydrothermal reaction in a mixed solution of nickel salt, molybdenum salt and a pH buffer agent, growing nickel-molybdenum oxide (NiMoO4) on a nickel net conductive substrate in situ, and then reducing and boronizing the nickel-molybdenum oxide through boron and hydrogen substances decomposed from a boron-containing small molecular compound under a high-temperature condition to form the multi-element NiMoB hydrogen evolution catalyst. According to the method, a large number of high-activity hydrogen evolution sites are exposed after the nickel-molybdenum oxide is subjected to the reduction replacement process, and the defect-rich and high-activity boron-doped nickel-molybdenum hydrogen evolution electrode is formed and can be applied to the field of hydrogen production.

The invention relates to a zinc negative electrode with an unsaturated molybdenum-based metal oxide solid electrolyte interface layer as well as preparation and application of the zinc negative electrode. The zinc negative electrode comprises a metal zinc matrix and the molybdenum-based oxide solid electrolyte interface layer which is generated on the surface of the metal zinc matrix and contains Mo < 4 + > / Mo < 5 + >. Compared with the prior art, the electrode provided by the invention has good corrosion resistance, the unsaturated molybdenum oxide-based solid electrolyte interface can effectively isolate the contact between the metal zinc electrode and the aqueous electrolyte, the hydrogen evolution side reaction is effectively reduced, and the pH value change on the surface of the electrode is inhibited. And in electrochemical test verification, the electrode shows excellent cycle stability, and does not have dendritic crystal morphology in subsequent scanning electron microscope observation, and the surface of the electrode still keeps flat.

The invention discloses modified mixed-dimension attapulgite clay, a mixed-dimension attapulgite clay-based medium and low temperature flue gas denitration catalyst as well as a preparation method and application of the modified mixed-dimension attapulgite clay-based medium and low temperature flue gas denitration catalyst. The specific surface area of the modified mixed-dimension attapulgite clay is not less than 140 m < 2 > / g, the average pore size is not less than 7.1 nm, and the ratio of Fe < 2 + > to Fe < 3 + > is 0.05-0.75. In the mixed-dimension attapulgite clay-based medium and low temperature flue gas denitration catalyst, the mass percent of the modified mixed-dimension attapulgite clay is 10-50%, the mass percent of the titanium dioxide is 37-89.9%, the mass percent of the vanadium oxide is 0.1-3%, the mass percent of the molybdenum oxide is 0-5%, and the mass percent of the tungsten oxide is 0-5%. According to the catalyst, the NO conversion rate of NH3-SCR reaction is higher than 90% within the working temperature range of 240-420 DEG C, and good industrial application prospects are shown.

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 invention belongs to the technical field of lithium battery materials, and particularly discloses a porous carbon negative electrode material for a lithium ion battery and a preparation method of the porous carbon negative electrode material. Firstly, a copolymer is prepared through staged polymerization of a functional monomer and a chain transfer agent; secondly, taking nano molybdenum trioxide and zinc acetate dihydrate as raw materials, and performing ball milling and roasting to form a core-shell template; then, mixing and sieving the copolymer, the core-shell template, sodium chloride and the polymethyl methacrylate microspheres to obtain a precursor; and finally, carrying out multi-stage heating carbonization and post-treatment on the precursor to obtain the porous carbon negative electrode material. The obtained negative electrode material has a hierarchical porous structure and a high specific surface area, synergistic doping of multiple elements such as nitrogen, phosphorus and molybdenum is realized, rapid transmission and efficient storage of lithium ions are effectively promoted, the rate capability and cycling stability of a battery are remarkably improved, polarization impedance is reduced, and meanwhile, the electronic conductivity and interface stability of the material are further optimized; excellent comprehensive electrochemical performance is shown in the application of a high-energy-density lithium ion battery.

The invention discloses a flame-retardant PVC (polyvinyl chloride) wood-plastic plate which is prepared from the following raw materials in parts by weight: 100 parts of SG-7 type PVC resin; 20-30 parts of modified wood powder; the composite flame retardant is composed of ammonium polyphosphate, aluminum hydroxide, molybdenum trioxide and zinc borate according to the weight ratio of 15: 20: 16: 4; the mass ratio of the aluminum-titanium composite coupling agent to the wood flour is 1: 100; 5-8 parts of a calcium-zinc stabilizer; the lubricant is composed of polyethylene wax, paraffin and calcium stearate according to the weight ratio of 1: 1: 1; and 5-10 parts of an acetyl butyl citrate plasticizer. The invention relates to the technical field of polymer composite materials, in particular to a flame-retardant PVC wood-plastic plate and a preparation method thereof.The flame-retardant PVC wood-plastic plate and the preparation method thereof have the remarkable advantages that due to a composite flame retardant, the oxygen index of the plate reaches 32.1%, the combustion performance reaches the UL94V-0 level, and the smoke density is reduced by 72.1%; the tensile strength, the impact strength and the bending strength are respectively improved by 339.6%, 59.1% and 179.5% when the wood powder is treated by the aluminum-titanium coupling agent; the extrusion temperature of 150-175 DEG C and the screw rotating speed of 12-18 r / min are accurately controlled, the problems of wood powder carbonization and flame retardant decomposition are avoided, and the quality consistency is guaranteed.

The invention provides a self-supporting molybdenum oxycarbide catalyst as well as a preparation method and application thereof. The preparation method mainly comprises the following steps: 1) heating a stainless steel mesh; 2) performing quenching reaction on the stainless steel mesh in urea and a solution containing molybdenum salt to introduce a molybdenum source and a carbon source; 3) alternately heating the stainless steel mesh and quenching to obtain a carbon-containing molybdenum oxide nanosheet as a precursor; and 4) carrying out rapid instantaneous heating treatment on the carbon-containing molybdenum oxide nanosheet precursor through a flash evaporation Joule technology under the protection of an inert atmosphere to obtain the self-supporting molybdenum oxycarbide catalyst. The self-supporting molybdenum oxycarbide catalyst provided by the invention is of a two-dimensional ultrathin nanosheet structure, and the nanosheet is rich in oxygen defects and has super-hydrophilic capacity, so that the adsorption of water molecules can be effectively enhanced, and the energy potential barrier of conversion of a hydrogen evolution reaction intermediate can be reduced. The method is short in technological process, high in preparation efficiency and suitable for large-scale industrial production, and has huge development potential in the field of hydrogen production through water electrolysis.

Provided are an oxide sintered body mainly containing a molybdenum oxide, a sputtering target containing the sintered body, and an oxide thin film formed by the sintered body. In the present invention, by adding a specific (pseudo) metal oxide in a prescribed range to a molybdenum oxide and a niobium oxide which are difficult to sinter, the sinterability can be improved and high-density characteristics can be ensured even if pressureless sintering is performed.