29 results about "Molybdenum dioxide" patented technology

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 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 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.

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 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 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 invention discloses a Ni-doped ferroferric oxide-molybdenum dioxide composite nano material, a preparation method thereof and application of the Ni-doped ferroferric oxide-molybdenum dioxide composite nano material as a hydrogen and oxygen evolution electrocatalyst. According to the invention, the Ni-doped ferroferric oxide-molybdenum dioxide composite nano material is successfully prepared through a diversified material preparation process combining hydrothermal synthesis, high-temperature calcination and electro-deposition. The catalyst is a non-noble metal-based composite material, has the advantages of low raw material cost and green and controllable preparation process, and solves the industrial problems of high price and scarce resources of traditional noble metal catalysts (such as Pt and RuO2).

The present application relates to the technical field of industrial solid waste resource utilization, in particular to a process for producing heavy slag sand from high-titanium slag. The process comprises the following steps: (1) adjusting the molten slag: under the condition of 1450-1500 DEG C, adding molybdenum dioxide and / or bauxite to the molten high-titanium slag, and then adding sodium carbonate and stirring to obtain the adjusted molten slag; (2) controlling the temperature and granulating: centrifuging the adjusted molten slag to form particles, and cooling the molten droplets by high-pressure air cooling to ensure that the molten droplets are cooled to 900-1100 DEG C during flight, and obtaining the granulated material; (3) activation treatment: activating the granulated material, and then dehydrating, drying and screening the activated material to obtain the heavy slag sand. The process optimizes the mineral phase composition of the slag and improves the mechanical properties of the product through the synergistic effect of molten component adjustment, temperature control granulation and hydrothermal activation, and finally prepares high-quality heavy slag sand meeting the building standards, realizing efficient resource utilization of high-titanium slag.

The application relates to the technical field of anti-radiation glass, and discloses anti-radiation glass for low-orbit spacecrafts, a preparation method and application thereof. The anti-radiation glass for low-orbit spacecrafts comprises the following raw materials in parts by mass: quartz sand 45.5-68 parts, aluminum hydroxide 8.41-10.25 parts, boric acid 8.86-24.62 parts, carbonate 24-43.69 parts, cerium dioxide 0.6-2.1 parts, gallium sesquioxide 0.2-1.2 parts, antimony sesquioxide 0.5-1 part, nitrate 2-4.6 parts, molybdenum dioxide 0.5-1.4 parts, lead oxide 0.8-2.2 parts, tetrabutyl titanate 3.4-12.75 parts, and kerosene 0.2-0.8 part. Through the technical scheme, the problem of insufficient anti-radiation performance of the glass for low-orbit spacecrafts in the related art is solved.

The invention relates to a method for preparing a patterned molybdenum dioxide thin film through laser induction and a flexible electronic device, and belongs to the technical field of functional material preparation and processing, precursor ink containing molybdenum trioxide nanoparticles, polyvinylpyrrolidone and isopropanol is prepared, a substrate is coated with the precursor ink to form a precursor thin film, and the patterned molybdenum dioxide thin film is prepared. And after drying and curing, carrying out laser direct writing reduction sintering on the precursor film, and reducing and sintering into molybdenum dioxide by utilizing a photothermal effect generated by surface plasmon resonance. The invention aims to overcome the dependence of a traditional process on a high-temperature vacuum environment, and provides a method for efficiently preparing a molybdenum dioxide film with high conductivity and biocompatibility in an environment atmosphere in a patterning manner, and a multifunctional flexible electronic device is constructed based on the film.

The invention discloses a thermal insulation molybdenum trioxide-molybdenum dioxide heterojunction / polyimide aerogel composite material and a preparation method thereof. A molybdenum trioxide nanobelt with a specific length-width ratio is accurately synthesized by utilizing a hydrothermal reaction; the controllable growth of the molybdenum trioxide-molybdenum dioxide heterojunction is realized through interface engineering, and a heterogeneous interface with an energy band matching characteristic is formed; then, the molybdenum trioxide-molybdenum dioxide heterojunction is compounded with polyamide acid, and the composite aerogel with a layered structure is prepared through a strong temperature gradient driven freezing assembly method and a freezing drying technology. By constructing a triple synergistic phonon scattering network of a molybdenum trioxide-molybdenum dioxide heterojunction interface, an organic-inorganic hybrid interface and a gas-solid porous interface, phonon scattering is effectively improved, and heat conductivity is reduced. The performance bottleneck of a traditional heat insulation material is broken through, and a brand new solution is provided for efficient heat management in an extreme environment.

The application belongs to the technical field of conductive ceramic materials, and particularly relates to a conductive ceramic material and a preparation method and application thereof. According to mass parts, the conductive ceramic material comprises the following components: 79-97 parts of beta-aluminum oxide, 0.5-2 parts of yttrium oxide, 0.7-3 parts of thorium oxide, 1-8 parts of zirconium oxide, 0.5-2 parts of molybdenum dioxide, 0.2-3 parts of copper oxide and 0.1-3 parts of zinc oxide. Due to the introduction of high-activity aluminum oxide nano powder and yttrium oxide, the sintering temperature can be greatly reduced, the energy consumption is reduced, the preparation cost is reduced, the competitiveness is improved, and the application is conducive to popularization.

The embodiment of the invention discloses a method for preparing a porous ferromolybdenum alloy through one-step hydrogen reduction. The method comprises the steps that S1, industrial molybdenum oxide and iron ore concentrate are mixed according to a set proportion, and a mixed raw material is obtained; s2, carrying out compression molding on the mixed raw material to form a cylindrical green body; s3, the cylindrical green body is heated to the pre-reduction temperature in the hydrogen atmosphere at the set pre-reduction heating speed for pre-reduction treatment, so that industrial molybdenum trioxide is reduced into molybdenum dioxide, and part of iron ore concentrate is reduced into iron oxide; and S4, the cylindrical blank obtained after pre-reduction treatment is heated to a reduction temperature from the pre-reduction temperature in a hydrogen atmosphere at the set reduction heating rate for reduction treatment, molybdenum dioxide and iron oxide are reduced into metal molybdenum and metal iron, the ferromolybdenum alloying process is achieved, and the porous low-apparent-density ferromolybdenum alloy is obtained. The porous ferro-molybdenum alloy with proper porosity is obtained by accurately controlling parameters such as the ratio of raw materials, the forming pressure, and the heating rate, the temperature, the time and the hydrogen flow in the hydrogen reduction process.

The invention provides a crystalline silicon solar cell and a preparation method thereof. The crystalline silicon solar cell comprises an N-type crystalline silicon substrate, a first passivation layer, a second passivation layer, an N-type amorphous silicon layer, a laminated structure, a first transparent conductive layer and a second transparent conductive layer. The first passivation layer and the second passivation layer are located on opposite surfaces of the N-type crystalline silicon substrate. The N-type amorphous silicon layer is located on the first passivation layer. The laminated structure is located on the second passivation layer and comprises a first molybdenum oxide layer on the second passivation layer and a second molybdenum oxide layer on the first molybdenum oxide layer. The first transparent conductive layer is located on the N-type amorphous silicon layer, and the second transparent conductive layer is located on the second molybdenum oxide layer. The first molybdenum oxide layer is doped with molybdenum and is used as a hole transport layer. And tungsten is doped in the second molybdenum oxide layer and is used for reducing the work function of molybdenum oxide, so that the work functions of the second molybdenum oxide layer and the second transparent conductive layer are matched.

The invention belongs to the technical field of metal material preparation, and discloses a preparation method and application of molybdenum lanthanum alloy molybdenum powder. According to the scheme, stable production of the 4N-grade high-purity molybdenum powder is achieved through two-time solid-solid doping, segmented hydrogen reduction and homogeneous molybdenum boat preparation processes; the method is characterized by comprising the following steps: mixing molybdenum dioxide and lanthanum oxide according to a ratio of (59-60): 1, carrying out primary reduction, carrying out secondary doping and mixing with pure molybdenum powder, carrying out secondary reduction to obtain molybdenum-lanthanum alloy molybdenum powder with the lanthanum content of 0.1-1.0%, and preparing a special molybdenum boat from the molybdenum-lanthanum alloy molybdenum powder or the pure molybdenum powder for carrying operation of a reduction furnace. Through twice solid-solid doping and segmented reduction processes, the high-temperature strength and recrystallization resistance of the molybdenum powder are improved, impurity pollution is effectively inhibited, and the purity and batch consistency of the molybdenum powder and the high-temperature service performance of a molybdenum boat are improved; and the technological process is completely autonomous and controllable without depending on imported high-temperature alloy, the raw material cost is reduced compared with a traditional process, and comprehensive economic benefits are remarkable.

The invention discloses a polystyrene composite material as well as a preparation method and application thereof, and belongs to the technical field of household appliance materials. The polystyrene composite material comprises polystyrene resin, a stick-slip inhibition component and a polar interface toughening agent, the stick-slip inhibition component comprises a component A and a component B, the component A is ultra-high molecular weight polyethylene, and the component B is selected from at least one of molybdenum dioxide, molybdenum oxide, molybdenum carbide, molybdenum disulfide, tungsten dioxide and boron nitride; the polar interface toughening agent is an acrylate copolymer containing a polar ethyl acrylate group. The material is applied to noise prevention of sliding parts of household appliances, the problem of stick-slip of the material is solved from the principle of noise generation, and friction noise does not exist in sliding parts such as refrigerator hinges and air conditioner air deflectors in the using process.

The invention belongs to the technical field of organic synthesis and photocatalysis, and relates to a semiconductor / molybdenum-based acidic composite catalyst and application thereof in preparation of dihydroquinazolinone derivatives. The composite catalyst comprises a semiconductor material and molybdenum-based acidic components loaded on the surface and in the semiconductor material, and a heterojunction structure is formed between the semiconductor material and the molybdenum-based acidic components. The semiconductor material comprises titanium dioxide, and the molybdenum-based acidic component is one or more of ammonium molybdate tetrahydrate, ammonium molybdate dehydrate, potassium molybdate, phosphomolybdic acid, silicomolybdic acid, molybdenum phosphorus heteropoly acid ammonium salt, molybdenum trioxide and molybdenum dioxide. A stable interface structure is formed in a loading mode, and the catalytic effect is synergistically enhanced by means of the interface electronic regulation and control capability of a semiconductor material while acidic active sites are maintained. The system not only significantly improves the reaction efficiency, but also has good cycle stability and recoverability, thereby providing a new technical path for green and efficient synthesis of dihydroquinazolinone compounds.

The invention discloses a preparation method of small-particle-size high-apparent-density molybdenum powder based on low-potassium ammonium molybdate, which comprises the following steps: taking ammonium molybdate with the potassium content of less than or equal to 0.005% as a raw material, and roasting to obtain molybdenum trioxide; the molybdenum trioxide is subjected to first-stage reduction in a hydrogen atmosphere with the dew point larger than or equal to 10 DEG C, and flaky caked molybdenum dioxide is obtained; and after the flaky caked molybdenum dioxide is ground and crushed, second-stage reduction is conducted in the hydrogen atmosphere with the dew point smaller than or equal to-40 DEG C, and the molybdenum powder is obtained. The technology is stable, the yield is high, and the obtained molybdenum powder has the small Fisher particle size and the large apparent density at the same time and is excellent in pressing performance and sintering performance.

The invention belongs to the technical field of new material preparation, and discloses low-potassium doped molybdenum powder and a preparation method and application thereof. According to the method, an atomization doping technology is adopted in the molybdenum dioxide stage, a potassium nitrate and lanthanum oxide synergistic doping agent is introduced, the total potassium content is controlled to be 80-98 mg / kg, and gas phase transmission and grain boundary regulation and control of the potassium element are achieved through a two-stage hydrogen reduction and programmed temperature rising strategy. According to the invention, through a compensation type atomization doping process, the energy consumption is reduced on the premise of strictly controlling the total potassium content; the obtained molybdenum powder is narrow in particle size distribution, uniform in morphology, good in fluidity and superior to a product obtained through a conventional low-potassium reduction method; the density of the molybdenum blank is effectively improved through composite doping of lanthanum oxide; the molybdenum wire eddy current flaw detection qualified rate and finished product rate meet the admission standard of the magnetron and wire cutting field on the high-end molybdenum wire; the technological process is simple, special equipment does not need to be added, only an atomization doping unit needs to be added to an existing reduction production line, the transformation cost is low, and large-scale implementation is easy.

This invention provides a back-contact solar cell, its fabrication method, and its application, relating to the field of photovoltaic technology. Specifically, the back side of the back-contact solar cell of this invention includes n... + Back contact area, and the n + The back contact region includes a gradient-doped antimony layer and a molybdenum dioxide buffer layer. Compared with the p-doped traditional BC battery, this invention achieves significant improvements in minority carrier lifetime, contact resistance, and battery efficiency. Furthermore, by combining gradient antimony doping with the molybdenum dioxide buffer layer, it breaks through the efficiency-cost balance of BC batteries, reducing mass production costs and modification expenses, thus exhibiting excellent photovoltaic performance and practical value.

This invention provides a molybdenum concentrate circulating roasting apparatus and method, relating to the field of molybdenum concentrate roasting technology. The apparatus includes a controllable roasting reaction unit and an oxidative regeneration roasting unit. The controllable roasting reaction unit mixes molybdenum trioxide powder and molybdenum concentrate powder and roasts them to generate molybdenum dioxide and sulfur dioxide gas. The oxidative regeneration roasting unit oxidizes and roasts the molybdenum dioxide, generating molybdenum trioxide powder or molybdenum trioxide vapor at different temperature ranges. A portion of the molybdenum dioxide prepared by the controllable roasting reaction unit is transported to the oxidative regeneration roasting unit, and the molybdenum trioxide powder prepared by the oxidative regeneration roasting unit is returned to the controllable roasting reaction unit, forming a closed-loop circulation system for molybdenum-based materials.

The invention relates to a preparation method and application of an amorphous nickel / crystalline molybdenum dioxide material for electro-catalytic hydrogen evolution. The method comprises the following steps: placing Mo-series heteropolyacid at the downstream of a tubular furnace, placing a solid atmosphere source at the upstream of the tubular furnace, then introducing mixed gas into the tubular furnace, heating to 400-700 DEG C, and carrying out pyrolysis reduction for 0.5-5 hours to obtain an amorphous nickel / crystalline molybdenum dioxide material; the Mo series heteropoly acid is specifically nickel molybdate (NiMoO4), 6-tetraammonium molybdenum nickelate or 9-hexaammonium molybdenum nickelate; the solid atmosphere source is urea, melamine, ammonium chloride or dicyandiamide. The catalyst is simple to prepare, adjustable in component and high in hydrogen evolution reaction activity.

The application belongs to the technical field of Raman spectrum detection, and particularly relates to a reusable Raman enhancement substrate, a preparation method and a cleaning method. The application prepares molybdenum dioxide nanoparticles by using molybdenum acetylacetonate as raw material through a hydrothermal reaction, disperses the molybdenum dioxide nanoparticles in water to form a molybdenum dioxide water dispersion, and drops the molybdenum dioxide water dispersion on a substrate to prepare a molybdenum dioxide substrate through drying. The molybdenum dioxide substrate prepared by the application has excellent Raman enhancement effect, and has excellent photo-thermal conversion efficiency and thermal conductivity. The molybdenum dioxide substrate can reach a surface temperature of 200-400 DEG C under the radiation of near-infrared laser or a xenon lamp, realizes the thermal decomposition removal of small molecules, achieves the purpose of cleaning and reusing the molybdenum dioxide substrate, and the MoO2 substrate still has excellent Raman enhancement effect and maintains the stability of the structure after 5 cycle tests.

The invention discloses a preparation method of dichloromolybdenum dioxide. The preparation method comprises the following steps: mixing molybdenum trioxide, carbon tetrachloride and a solvent; and in an inert atmosphere, heating to 180-240 DEG C for reaction to obtain the dichloro molybdenum dioxide. According to the preparation method, the reaction temperature is low, the reaction conditions are easy to control, the reaction selectivity is high, the purity of the obtained target product molybdenum dioxide is high, and the purity gt of the molybdenum dioxide is high; 99% of molybdenum metal ions gt; the purity is 99.9999%.

The application relates to a kind of molybdenum dioxide-nano carbon fiber composite and its preparation method and application, and relates to the technical field of lithium ion battery negative electrode material, molybdenum disulfide nanosheet and polyacrylonitrile are dispersed in organic solvent with the mass ratio of 0.1-2:1, to obtain mixed solution;The mixed solution is electrospun to obtain molybdenum disulfide-polyacrylonitrile nanofiber;Molybdenum disulfide-polyacrylonitrile nanofiber is oxidized at 400-600 DEG C, to obtain molybdenum dioxide-polyacrylonitrile composite material;Molybdenum dioxide-polyacrylonitrile composite material is carbonized under the condition of protective atmosphere and 700-900 DEG C, to obtain molybdenum dioxide-nano carbon fiber composite.The product of the application slows down the volume expansion of molybdenum dioxide in the charging and discharging process, has good cycle performance, larger specific capacity and excellent rate performance.

The present invention relates to a method for producing molybdenum dioxide dichloride, which is a very efficient method that does not use dangerous chlorine gas and high reaction temperature and is capable of obtaining molybdenum dioxide dichloride without solvent at a high yield.

The application belongs to the technical field of metal material preparation, and discloses a preparation method of molybdenum-lanthanum alloy molybdenum powder and application thereof. The scheme realizes stable production of 4N high-purity molybdenum powder through twice solid-solid doping, segmented hydrogen reduction and homogeneous molybdenum boat preparation process; the scheme is characterized in that: firstly, molybdenum dioxide and lanthanum oxide are mixed at a ratio of (59-60):1 and reduced once, then the mixture is doped with pure molybdenum powder and reduced twice to obtain molybdenum-lanthanum alloy molybdenum powder with a lanthanum content of 0.1%-1.0%, and a special molybdenum boat is made of the molybdenum-lanthanum alloy molybdenum powder or pure molybdenum powder and used for reduction furnace bearing operation. The application improves the high-temperature strength and anti-recrystallization ability of the molybdenum powder through twice solid-solid doping and segmented reduction process, effectively inhibits impurity pollution, improves the purity, batch consistency and high-temperature service performance of the molybdenum boat, the process flow is fully controllable, and the application does not need to rely on imported high-temperature alloy, the raw material cost is lower than that of the traditional process, and the comprehensive economic benefit is remarkable.

The invention relates to a preparation method and application of molybdenum dioxide modified vinegar residue biochar, and belongs to the technical field of sewage treatment.The method comprises the steps that cleaned and dried vinegar residue powder is heated to 800 DEG C in the N atmosphere, constant-temperature pyrolysis is conducted for 120 min, original biochar is obtained after natural cooling is conducted to the room temperature, and the original biochar is sealed and stored; the preparation method comprises the following steps: weighing 0.65 g of original biochar (BC), putting the BC into 75mL of ultrapure water, carrying out ultrasonic uniform dispersion, adjusting the pH value of the solution to 1.0 by using HCl, then sequentially adding 0.90 g of ammonium molybdate and 0.69 g of ascorbic acid, and mixing to form a mixed solution; carrying out a hydrothermal reaction on the mixed solution at 180 DEG C for 48 hours, after the reaction is finished, carrying out suction filtration to separate a solid product, and respectively washing with ultrapure water and absolute ethyl alcohol for three times to remove residual reactants; and finally, annealing at 500 DEG C in an N atmosphere for 5 hours to obtain the molybdenum dioxide modified vinegar residue biochar. The technological process is clear, operation conditions are controllable, and the prepared molybdenum dioxide modified vinegar residue biochar has good performance of degrading organic pollutants, especially for degrading and removing quinolone antibiotics.