573 results about "Molybdenum oxide" patented technology

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 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 invention discloses a coating type high-molecular flame-retardant material. The composite material is prepared from the following components: organic silicon modified epoxy resin, a bio-based castor oil derivative, hydroxyapatite, carbon nanofibers, expanded graphite, ammonium polyphosphate, zinc borate, nano silicon dioxide, molybdenum oxide, microencapsulated red phosphorus, magnesium hydroxide, melamine cyanurate, aluminum diethylphosphinate, pentaerythritol, trihydroxymethyl phosphine oxide and a silane coupling agent. The coating is prepared from a titanate coupling agent, stearic acid, polyethylene glycol, 2, 6-butylated hydroxytoluene, triphenyl phosphite, 2, 4-dihydroxybenzophenone, sebacic diester, polytetrafluoroethylene micro powder, a modified polydimethylsiloxane flatting agent, organic montmorillonite, a polyether modified silicon defoaming agent and a solvent. The invention has the beneficial effects of high flame retardant efficiency, environmental friendliness, excellent comprehensive performance and excellent processability.

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 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 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 provides a molybdenum mineral content measuring method, and belongs to the field of process mineralogy, and the method comprises the following steps: carrying out ore grinding, ore washing and desliming treatment on a to-be-measured sample to obtain slurry and ore washing concentrate; the ore washing concentrate is subjected to gravity separation, and gravity separation concentrate and gravity separation tailings are obtained through separation; mixing the slime and the gravity concentrate to obtain a mixed sample, and performing molybdenum phase analysis to obtain the content of molybdenum oxide; an automatic mineralogical analysis sample of the mixed sample and an automatic mineralogical analysis sample of the gravity separation tailings are prepared respectively, automatic mineralogical analysis is carried out, and a molybdenite content correction coefficient and a molybdenum oxide content correction coefficient are calculated; and calculating the content of various molybdenum minerals in the to-be-detected sample in combination with the correction coefficient and the mineral content data. By optimizing the sample preparation process, molybdenite oxidation is reduced, and the mineral recognition accuracy is improved. Molybdenum oxide and molybdenum sulfide are treated separately, different correction processes are adopted, and the accuracy of ore molybdenum mineral measurement is improved in a targeted mode.

The invention discloses a Mo-Bi-based catalyst and a preparation method and application thereof.The catalyst comprises active components, the active components comprise spherical particles and molybdenum oxide nanorods attached to the surfaces of the spherical particles, and the spherical particles contain molybdenum and / or molybdenum oxide and bismuth and / or bismuth oxide. When the catalyst is applied to propylene oxidation synthesis of acrolein, the catalyst has the technical effect of high acrolein selectivity.

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 provides a preparation method of a molybdenum phosphide / titanium nitride composite material and a battery positive electrode material and a lithium-carbon dioxide battery, and belongs to the technical field of new energy materials. And then a titanium nitride conductor layer is deposited on the molybdenum phosphide by using an atomic layer deposition technology to prepare the molybdenum phosphide / titanium nitride, the molybdenum phosphide is combined as a transition metal phosphide to have stable catalytic performance, and the titanium nitride is used as a conductor to have excellent conductivity. The lithium-carbon dioxide battery positive electrode catalyst with high catalytic activity, high conductivity and excellent stability is obtained through the synergistic effect of the two materials, and when the lithium-carbon dioxide battery positive electrode catalyst is applied to a lithium battery, higher energy density, longer cycle life and better rate capability are shown, so that the overall performance of the battery is improved, and the application prospect is wide. The requirements on high-performance batteries in the fields of electric automobiles, energy storage systems and the like are met.

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 invention provides a waste molybdenum-based catalyst regeneration method which comprises the following steps: crushing and grinding a waste molybdenum-based catalyst to obtain catalyst powder; adding a liquid caustic soda solution into the obtained catalyst powder, and placing in a reaction kettle for hydrothermal reaction to obtain molybdenum hydroxide and sodium sulfate; the obtained molybdenum hydroxide is sequentially subjected to drying treatment, forming treatment and calcining treatment, and the regenerated catalyst is obtained. According to the present invention, the poisoning catalyst is regenerated by mainly using the hydrothermal reaction principle, such that the catalyst cost can be reduced, and the operation cost caused by other waste catalyst recovery methods can be avoided, such that the regeneration of the catalyst active component is achieved through the multi-stage staged treatment so as to significantly improve the regeneration efficiency and the regeneration frequency; and a new technical path is provided for resource utilization of the waste molybdenum-based catalyst.

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.

The invention relates to the technical field of catalysts, and discloses a heavy aromatics lightening catalyst and a preparation method thereof.The preparation method comprises the steps that deionized water, a nickel source and a molybdenum source are added into a container and stirred, then the solution is poured into the container containing a modified molecular sieve, drying, roasting and cooling are conducted after dipping, and the heavy aromatics lightening catalyst is obtained. A large number of carboxyl groups, imino groups and hydroxyl groups are introduced on the surface of the molecular sieve and are subjected to coordination complexation with nickel and molybdenum, and nickel-molybdenum oxide generated by high-temperature calcination can be uniformly distributed in a molecular sieve matrix, has more nickel-molybdenum catalytic active centers, can effectively catalyze C9 < + > heavy aromatics to generate light aromatics BTX, and can be used for preparing the light aromatics BTX. And the catalyst has good practical application in preparation of light aromatic hydrocarbon BTX by catalyzing heavy aromatic hydrocarbon.

The invention belongs to the technical field of water electrolysis hydrogen production catalysis, and particularly relates to a ruthenium molybdenum oxide nanorod electrocatalyst, a preparation method and application. In the electrocatalyst, the molar ratio of Mo to Ru is 1: 1-1: 9, and Mo atoms enter ruthenium oxide crystal lattices in the form of replacing Ru atoms; the method comprises the following steps: adding ammonium-containing molybdenum salt and NaNO3 crystals into a ruthenium salt solution, drying, grinding, calcining in air, cooling, and washing with deionized water to remove the NaNO3 crystals to obtain the electrocatalyst. According to the preparation method of the electrocatalyst, the problems of poor stability, high cost, complicated preparation and the like in the preparation process of an anode end catalyst in a proton exchange membrane water electrolysis hydrogen production technology are solved, the prepared electrocatalyst presents an ultra-small nanorod morphology, and a large number of edge and corner sites are generated for an oxygen production reaction; the Ru-O coordination structure of the electrocatalyst is in an unsaturated state, the Ru-O covalent interaction is significantly weakened, the introduction of Mo with low electronegativity inhibits the excessive oxidation of the electrocatalyst, and the oxygen production stability is high.

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 discloses an antibacterial PVC plate containing oyster shells and a preparation method of the antibacterial PVC plate, and relates to the technical field of PVC plates. The preparation method comprises the following steps: 1, sequentially loading zinc and silver on oyster shell powder to obtain an oyster shell antibacterial agent; step 2: (1) compounding the oyster shell antibacterial agent with molybdenum oxide to obtain a composite filler; (2) pretreating the composite filler with a coupling agent to obtain a modified composite filler; and 3, uniformly mixing polyvinyl chloride resin, maleic anhydride modified polyvinyl chloride, the modified composite filler, a heat stabilizer, a lubricant, a plasticizer, an initiator and a foaming agent, carrying out melt extrusion, and pressing into a plate, thereby obtaining the antibacterial PVC plate. The prepared antibacterial PVC board not only has excellent antibacterial property, but also has excellent mechanical property and flame retardance.