2441 results about "Catalytic degradation" patented technology

Provided is a visible light photocatalyst and a preparation method therefor. The visible light photocatalyst comprises down conversion materials and semiconductor materials. The mass percent of the down conversion materials to the semiconductor materials is 0.5%-5%. The visible light photocatalyst with down conversion functions is advantaged by high visible light catalytic degradation rate, no pollution, simple preparation method and low cost. The invention also provides a preparation method for the visible light photocatalyst with down conversion functions.

Application of spinel ferrite catalyst and a method for urging persulfate to generate free radicals to catalytically degrade organic matters relate to application of spinel ferrite catalyst and a method for degrading organic matters. The invention aims to solve the problems of high probabilities of oxygenolysis and breakage, low strength, impurity dissolution, low catalytic efficiency and difficulty in recovering in the existing catalyst as catalyst generated by sulfate free radicals and complex reaction system, rigor reaction conditions and higher cost in the existing activating technology. The spinel ferrite catalyst, as catalyst for urging the generation of persulfate free radicals, for urging persulfate or mono-persulfate to generate free radicals is applied; and the method comprises the following steps: the spinel ferrite catalyst is adopted as catalyst for urging the generation of persulfate free radicals to urge persulfate or mono-persulfate to generate free radicals; and then sulfuric acid free radicals are used for degrading the organic matters. The application and the method are mainly applied in catalytic degradation of the organic matters.

The invention discloses a g-C3N4 nanosheet / CdS composite visible-light-driven photocatalyst and a preparing method and application thereof and belongs to the technical field of material preparation and photocatalysis. The catalyst is directly obtained with the solvothermal method by taking two-dimensional ultra-thin g-C3N4 nanosheets as the matrix, cadmium acetate dihydrate and thioacetamide as raw materials, and ethyl alcohol as the solvent. Compared with general block g-C3N4 / CdS, the two-dimensional ultra-thin g-C3N4 nanosheet / CdS composite photocatalyst prepared with the method has the advantages that the two substances are in tighter contact, the specific surface area is larger, photon-generated electron-hole can be better separated, and photocatalytic efficiency is higher. Under the shining of sunlight, the composite photocatalyst enables catalytic degradation of organic pollutants such as methyl orange in water to be achieved well. The preparing method is easy, raw materials are easy to obtain, visible light catalysis efficiency is high, and the application prospect is wide in the photocatalysis field.

The invention discloses a composite with an adsorption-visible light catalytic degradation synergistic effect and a preparation method and application thereof. The preparation method includes the specific steps that firstly, a bismuth oxyiodide / bismuth oxychloride composite nano-particle loaded activated carbon fiber composite ACF@BiOIxCl1-x is synthesized; then, the fiber surface is grafted with polyethyleneimine, and the end composite PEI-g-ACF@BiOIxCl1-x is obtained. The composite can rapidly adsorb pollutants in water, and meanwhile the pollutants are efficiently degraded with a photocatalyst loaded on the surface of the composite; besides, the purpose of recycling and reusing the photocatalyst is achieved, the comprehensive treatment capability of the composite is improved, the service life of the composite is prolonged, and the use cost is lowered.

The invention discloses a carbon material loaded nano zero valence metal catalyst which comprises a nano zero valence metal and a carbon material, wherein the nano zero valence metal is uniformly dispersed in the carbon material; the loading quantity of the nano zero valence metal is 5-15mg / g; the nano zero valence metal is iron, copper, zinc or nickel; and the carbon material is a carbon nano tube, graphene or nano activated carbon. The invention further discloses the preparation and an allocation and application of the catalyst. The nano zero valence metal is loaded to the carbon material, so that the agglomeration of the zero valence metal is prevented, the stability of the catalyst is improved, and the specific surface area of the catalyst is remarkably increased; the catalyst is high efficient, cheap and stable in performance; a chlorine-containing organic pollutant can be rapidly and efficiently absorbed and enriched; and meanwhile the excellent electronic transmission capability of the nano carbon material can greatly accelerate the catalytic degradation speed of the pollutant, so that the pollutant can be more rapidly and effectively removed, so that the carbon material loaded nano zero valence metal catalyst is safe and economical.

The invention relates to a preparation method and application method of a titanium dioxide nanosheet supported MIL-100 (Fe) composite photocatalysis material, belongs to the field of titanium dioxide photocatalysis, and especially relates to the field of titanium dioxide nanosheet supported porous metal organic skeleton (MOFs) composite materials. The preparation method comprises the following steps: 1, uniformly stirring tetrabutyl titanate and hydrofluoric acid at normal temperature, putting the obtained mixture in a hydrothermal reaction kettle, carrying out a reaction, separating the obtained material, washing the separated material, and drying the washed material to obtain titanium dioxide nanosheets; and 2, uniformly dispersing the titanium dioxide nanosheets in an anhydrous ethanol solution of iron trichloride, carrying out magnetic stirring at normal temperature for 15 min, carrying out suction filtration separation to obtain a product, dispersing the product in an anhydrous ethanol solution of trimesic acid, carrying out a 50-80 DEG C water bath reaction for 20-50 min, carrying out suction filtration separation to obtain a product, and repeating above processes in step 2 2-50 times to obtain the titanium dioxide nanosheet supported MIL-100 (Fe) composite photocatalysis material. The catalyst prepared through the method is especially suitable for catalytic degradation of high-concentration organic dyes (such as methylene blue) under visible light irritation) to reach a very high degradation rate.

The invention discloses a graphene loaded Cu-CuxO composite material and a preparation method thereof. Through the preparation method, Cu-CuxO composite particles with uniform particle size and controllable morphology and components can be loaded on graphene. The preparation method comprises the following steps of dispersing uniformly oxidized graphite in deionized water by supersonic waves to obtain an oxidized graphene solution, adding a copper salt into the oxidized graphene solution, mixing uniformly, adjusting a pH value of the mixed solution obtained by the previous step to an appropriate pH value, putting the mixed solution into a reactor for a hydro-thermal reaction, carrying out separation and calcination of reaction products obtained by the hydro-thermal reaction to obtain the graphene loaded Cu-CuxO composite material. The preparation method has the advantages of common and easily available raw materials, low cost, and simple and safe preparation processes. The prepared graphene loaded Cu-CuxO composite material has good structural stability, excellent physicochemical properties, and potential application values in the fields of lithium ion batteries, photoelectric conversion, catalytic degradation and electron devices.

The invention relates to a microwave photocatalytic degradation treatment device for industrial wastewater containing organic pollutants, which belongs to the technical field of wastewater treatment. In existing microwave photocatalytic degradation technology for industrial wastewater containing organic pollutants, scale can be formed on the outer side surface of a quartz tube for shielding an electrodeless ultraviolet lamp in a microwave photocatalytic reaction device after the quartz tube is soaked in the wastewater for a long time, due to the scale, the ultraviolet light transmission performance of the quartz tube is affected severely, and the treatment efficiency of the microwave photocatalytic reaction device is greatly reduced. The scheme aims to resolve the problem. The microwave photocatalytic degradation treatment device in the scheme structurally comprises a rod-shaped ultrasonic probe which is inserted in a reactor via the top of the reactor, so that real-time ultrasonic removal for scale on the outer side surface of a quartz tube is realized without stopping or detaching, the high ultraviolet light transmission performance of the quartz tube is maintained, and continuous high efficiency of the microwave photocatalytic degradation reactor is maintained. Due to the assembly mode in the scheme, liquid is not easy to leak, and the device can be detached and replaced conveniently.

The invention discloses a carbon material-supported copper-cobalt bimetallic sulfide composite material and its preparation method and application in water treatment. In the composite material, the copper-cobalt bimetallic sulfide (CuCo2S4) micrometer or nanometer particles are loaded on the carbon material. Through a one-step method or a multi-step method, the composite material is prepared. In water treatment or waste water treatment, through synergistic effects between the copper-cobalt bimetals and synergistic effects between the sulfide and carbon material, the composite material has good catalytic degradation and degradation pollutant adsorption performances.

The invention discloses a use of a heteroatoms doped aqueous carbon quantum dot as a novel efficient photocatalyst. The various-heteroatoms doped aqueous carbon quantum dot contains one or more of heteroatoms comprising N, S, Si, Se, P, As, Ge, Gd, B, Sb, Te and the like, and the absorption spectrum wavelength of the heteroatoms doped aqueous carbon quantum dot is in a range of 300-850nm. Researches find that the heteroatoms doped aqueous carbon quantum dot can realize the efficient catalytic degradation of organic pollutants in the environment under the irradiation of sunlight, can also realize the efficient photolysis of water to prepare hydrogen, and has huge application prospects in the environment and energy fields.

The invention relates to a preparation method of a titanium dioxide / graphene composite photocatalyst. The invention is to solve the technical problems that titanium dioxide in a titanium dioxide / graphene compound prepared by the traditional method has a large particle size and low photocatalytic efficiency. The preparation method comprises the following steps that: tetrabutyl titanate is added to a graphene oxide dispersion solution, a concentrated acid is added to adjust the acidity after ultrasonic dispersion, and then deionized water is added to continue to carry out ultrasonic treatment to obtain sol; and then the sol is transferred to a hydrothermal reaction kettle to be subjected to hydrothermal reaction, and then is washed and dried to obtain the titanium dioxide / graphene composite photocatalyst. The particle size of the titanium dioxide in the composite photocatalyst provided by the invention is 5 to 10nm, and the composite photocatalyst can be used for visible light catalytic degradation of methyl orange, and the catalytic efficiency can reach 75% within 2 hours. The titanium dioxide / graphene composite material provided by the invention can be used as a photocatalytic material, a solar cell material and a lithium ion battery cathode material.

The invention provides a composition for use in degradable plastics, which comprises: 1) a visible light catalytic oxidation degradation and thermally catalytic oxidation degradation component which is metal organic compound of a transition metal and accounts for 1 to 10 percent of the total weight of the composition; 2) an ultraviolet light catalytic degradation component which is a nano transition metal compound which has a particle diameter of between 5 and 100 nanometers and an ultraviolet light catalytic degradation function and accounts for 0.1 to 10 percent of the total weight of the composition; 3) an assisted oxidation degradation component which accounts for 1 to 10 percent of the total weight of the composition; and 4) a plastic basic component which accounts for the balance ofthe total weight of the composition. The invention also relates to the use of the composition in the production of degradable plastic products and the various degradable packaging or dispensable plastics and plastic products produced by using the composition.

The invention discloses a reactor for photoelectrocatalysis degradation of organic compounds using a rotary table supported with a catalyst, and a method for degrading the organic compounds by the reactor. The reactor comprises a rotary table supported with a photo-electro catalytic activity catalyst as the anode of the reactor, a motor driving the rotary table to rotate, a conductive granular activated carbon which can electrically catalyze the oxygen to generate hydrogen peroxide as the cathode, an ultraviolet or visible light source arranged in the reactor. The hydrogen peroxide generated from the activated carbon cathode forms hydroxyl radical under the action of the ultraviolet and degrades the organic compounds around both the anode region and the cathode region; the application of the rotary table avoids the light adsorption of the solution and accelerates the transfer of oxygen in the solution, which obviously improves the catalysis degradation efficiency of the refractory organic compounds.

The invention discloses a preparation method of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) and an application of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) in visible-light-induced catalytic degradation of methylene blue. The catalyst is prepared by steeping a cobalt precursor and roasting at high temperature. The preparation method comprises the following steps of: (1) roasting at high temperature by using silica solution (Ludox, HS-40, 12nm, 40wt%SiO2) as a template and cyanamide as a carbon source and a nitrogen source, and removing the template to prepare mesoporous graphite-phase carbon nitride (mpg-C3N4); and (2) steeping the precursor solution of cobalt into mpg-C3N4, carrying out secondary high-temperature roasting in a muffle furnace to prepare the load-type catalyst Co / mpg-C3N4. By using the cobalt-carried mesoporous graphite-phase carbon nitride as the visible-light-induced catalyst, the result shows that the effect of the cobalt-carried mesoporous graphite-phase carbon nitride used for the visible-light-induced catalytic degradation of methylene blue is good, and the visible-light-induced catalytic degradation rate is obviously improved in comparison with the mesoporous graphite-phase carbon nitride (mpg-C3N4) without cobalt.

The present invention relates to an antibacterial and antiviral non-woven fabric, a preparation method of the fabric and a mask containing the fabric. The antibacterial and antiviral non-woven fabriccontains nano-silver, and also contains an inorganic antibacterial agent and / or an organic antibacterial agent; the inorganic antibacterial agent comprises any one or combination of at least two of nano titanium dioxide, nano zinc oxide, bismuth tungstate and nano silicon dioxide; and the organic antibacterial agent comprises chitosan and / or quaternary ammonium salt. The mask sequentially comprises a first fabric layer, the antibacterial and antiviral non-woven fabric and a second fabric layer from inside to outside. While the air permeability is not affected, the mask is endowed with the long-acting antibacterial, anti-haze and antiepidemic antiviral properties, has the catalytic degradation function for harmful gases such as formaldehyde and benzene in air, and can be repeatedly washed with water to be recycled, thereby greatly reducing the use cost of the protective mask.

The invention relates to an activated charcoal loaded nano zero-valent iron material which is characterized in that the granulated activated charcoal is used as a carrier and has a particle diameter of 0.2-0.45 mm and specific surface area above 1,500 m<2>; a solid loaded inorganic material is nano zero-valent iron particles, the loaded iron is zero-valent Fe; the loaded nano zero-valent iron particle has the size of 1-100 nm, and the content of the Fe is 200-2000 mg / g. The zero-valent iron material provided by the invention not only has the superior adsorption effect of the activated charcoal, strong reducing action of the nano iron, but also can accelerate the reduction reaction as the loading type nano iron takes iron as an anode and C as a cathode to form a primary battery, has a great impact on the catalysis degradation of the contaminant and can provide better technical support for safe control and deep purification of environmental micro contaminant (such as heavy metal ions, macromolecule dye and halogenated organic matters).

The invention discloses a macroscopic preparation method for high yield carbon quantum dot. The method includes: putting a reaction substrate and a dopant into a solvent together, carrying out reaction at 130-250DEG C for 0.5-50h, and then conducting dialysis, rotary evaporation, freeze-drying and other steps to obtain carbon quantum dot powder. The method provided by the invention has the characteristics of easy operation, easily controllable reaction conditions, and high carbon quantum dot yield, and is suitable for large-scale production. The prepared carbon quantum dot can be used for biolabeling, cell fluorescence imaging, photoelectric devices, heavy metal ion detection, catalytic degradation of pollutants, biosensors and other fields.

The invention relates to an energy-saving consumption-reducing environment-friendly method for preparing haydite by co-disposing municipal massive solid wastes, which comprises the following steps: directly mixing polluted soil and polluted desilting sediment (without energy-consuming drying), adding a conditioner, granulating, and firing at 900-1200 DEG C for 15-40 minutes. The test indicates that the prepared haydite product has the following properties: the bulk density is 500-900 kg / m<3>, the cylindrical compressive strength is 5.0-10.0 Mpa, and the water absorptivity is 4.8-9.2%; and the leaching toxicities of typical heavy metals are as follows: Cu<0.26 mg / L, As<0.03 mg / L, Cd<0.0002 mg / L, and Hg<0.0001 mg / L. The method provided by the invention fully utilizes the water-content complementarity of the polluted soil and sewage reservoir sediment as well as the characteristic of mutual catalytic degradation of heavy metal pollutants and organic pollutants, implements energy saving and consumption reduction in the technical field of traditional techniques for preparing haydite from solid wastes, lowers the cost and secondary pollution in solid waste disposal industry, enhances the properties of the solid waste haydite, and widens the application field of the solid waste haydite.

The invention discloses a preparation method of a catalytic activity nano particle loaded absorbent, which comprises the step of: with a plurality of kinds of absorbing agents as carriers, surface-loading metal oxide nano particles with catalytic activity to obtain the efficient catalytic activity absorbent in sewage treatment. The invention also discloses an absorbent prepared by using the method and application thereof in the posttreatment of organic phosphorus containing sewage. The absorbent achieves the purpose of synergism of catalysis and absorption through carrying out catalytic oxidization reaction on the surface-loaded nano particles, thereby overcoming the problems of low capacity and difficult desorption of the traditional physical absorbing process and easy loss of components of catalysts in the high-grade oxidization technology in the sewage treatment, remarkably improving efficiency of removing the absorbent, and reducing process links and steps. The absorbent has wide application prospect on the aspects of domestic sewage purification, chemical plant sewage treatment, catalytic degradation of toxic substances in the sewage, and the like.

The invention discloses modified TiO2 loaded photocatalytic ceramsite and a preparation method thereof and belongs to the field of nano photocatalytic materials. The preparation method comprises the following steps: firstly, preparing porous ceramsite by using raw materials including industrial sludge, clay, sawdust and calcium hydroxide; and secondly, covering one layer of nano-grade modified TiO2 on the surface of the porous ceramsite through an immersion method to finally prepare the modified TiO2 loaded photocatalytic ceramsite. According to the modified TiO2 loaded photocatalytic ceramsite and the preparation method thereof, the raw materials are cheap and the process is simple; the prepared ceramsite material is uniform in grain diameter, adjustable in size, large in specific surface area and high in photocatalytic activity, and has a very high catalytic degradation capability in an ultraviolet-visible light region. The photocatalytic ceramsite material can be used for photocatalytic treatment of organic wastewater and can also be used for oxidative degradation of gas-phase organic matters.

The invention relates to a graphene oxide / titanium dioxide composite photocatalysis material and a preparation method thereof, and belongs to the technical field of photocatalysis. The material of the present invention is applicable for catalytic degradation of pollutants. With the present invention, the problem of low photocatalysis efficiency of the catalyst is solved. The structure of the composite photocatalysis material is that: nano-scale titanium dioxide is uniformly dispersed in micron graphene oxide lamellas to form the composite photocatalysis material. The preparation method for the composite photocatalysis material comprises: 1, preparing the graphene oxide into an aqueous suspension; 2, sequentially and slowly adding polyethylene glycol, glacial acetic acid and tetrabutyl titanate to dehydrated alcohol under a stirring condition to prepare into a mixing solution; 3, adding the prepared graphene oxide aqueous suspension from the step 1 to the prepared mixing solution from the step 2 in a dropwise manner, stirring at a uniform speed at a room temperature to form a mixed solution; 4, drying the mixed solution from the step 3 to obtain the solid mixture; 5, placing the obtained solid mixture from the step 4 to a container, carrying out calcination under the protection of inert gas to obtain the graphene oxide / titanium dioxide composite photocatalyst.

The invention discloses a multifunctional air purification filter screen, which comprises a primary filter module, an HEPA filter module, and a gas adsorption and catalytic degradation module. The multi-module structures are connected and fixed into an integral filter screen from the outside in, the filter screen can achieve effective interception of fine particulate matters (PM2.5), bacteria, viruses and other particulate pollutants and thorough decomposition and purification of formaldehyde, ozone, toluene and other gaseous pollutants, also has deodorization, bacteriostasis and sterilization effects, is a multifunctional air purification filter screen integrating air filtration, purification, antibacterial efficacy, etc. With the characteristics of small wind resistance, long service life and good stability, the multifunctional air purification filter screen provided by the invention has great application prospects in air purifiers, central ventilation systems and other air purification devices, also is low in cost, and can realize large-scale continuous production.

The invention discloses an alginate-based composite hydrogel catalytic membrane of a renewable catalyst and a preparation method thereof. According to the invention, a photo-catalyst / alginate composite membrane is prepared by mixing a photo-catalyst and sodium alginate fully to prepare a membrane casting solution, scraping the membrane on a glass plate by using a membrane scrapping rod and performing metal ion cross-linking. By selecting the type of the photo-catalyst, the content and the particle diameter of the photo-catalyst are changed, so that a catalytic degradation of toxic and harmful organic matters of the membrane is adjusted. The reusability of the membrane is greatly improved by applying the characteristics that an ion cross-linking agent in the alginate hydrogel is not degraded during radiating, and although the macromolecules of the alginate are degraded, a hydrogel with a similar strength of the hydrogel before degrading can be formed. The preparation method of the composite hydrogel catalytic membrane is simple and low in cost; the preparation process is free of pollution, green and environmental-friendly; the composite hydrogel catalytic membrane is immersed by a strong metal ion complexing agent; the expensive photo-catalyst can be recycled through simple precipitation separation.

The invention relates to a vanadate nanofiber photocatalyst and a preparation method thereof. The nanofiber photocatalyst is pucherite, or silver vanadate, or a compound of pucherite and silver vanadate. Organic vanadic salt, organic bismuth salt and the like with good alcohol solubility are taken as precursor reactors, a spinning solution is prepared by a PVP (Polyvinyl Pyrrolidone) and alcohol system, electrospining is performed by an electrospining device, then high-temperature roasting is performed, and the vanadate nanofiber photocatalyst is obtained. A prepared vanadate nanofiber is in a monoclinic crystal phase, is 30-100nm in diameter, has a narrower band gap, shows good visible light catalytic degradation ability for ofloxacin, a contaminant in water, and can be separated from a solution quickly by precipitation.

The invention relates to a high-dispersibility Pt nanoparticle supported MnO2 catalyst, its preparation method and an application thereof. According to the preparation method, under the condition of an aqueous solution, sodium citrate, PVP, ascorbic acid and chloroplatinic acid are used as raw materials to synthesize Pt nanoparticles, which are used as an active component to be loaded on an MnO2 carrier, so as to obtain the catalyst which is formed by the MnO2 carrier and the Pt nanoparticles loaded on the surface of the carrier. The loading of the Pt nanoparticles accounts for 0.1-10% of the weight of the catalyst. The catalyst can be used for catalytic degradation of indoor pollutants (such as formaldehyde) and used for preparation of electrode materials for cells, magnetic materials, fuel cells and the like. The catalyst can be used for complete catalytic degradation of formaldehyde at low temperatures, and has advantages of high efficiency, low energy consumption, simple operation, mild reaction condition and secondary pollution eradication.

The invention belongs to the field of the energy and chemical industry and particularly relates to a preparation method of a nanometer material using clay as a carrier and using a perovskite type compound as an active component and application of the nanometer material in photocatalytic degradation of antibiotics.Lanthanum nitrate, ferric nitrate, cerous nitrate, citric acid and the clay are added to deionized water and are mixed, then the mixture is transferred to a water bath kettle for evaporation to obtain wet gel, and drying, calcinations and dry grinding are performed to obtain the lanthanum ferrite / clay nano-structure composite material.The antibiotics are subjected to the photocatalytic degradation by adopting the composite material and can be rapidly degraded under visible light by utilizing the high catalytic activity of (cerium doped) lanthanum ferrite.The clay carrier facilitates antibiotic molecular adsorption in the antibiotic degradation process, the antibiotics are in contact with the lanthanum ferrite after being absorbed to the catalyst surface, and antibiotic molecules are decomposed under visible light irradiation to produce other active species.

The invention discloses a zero-valent iron carrying nanometer composite resin for catalytic degradation of pollutants and a preparation method thereof. The zero-valent iron nanometer composite resin has the following structures: (1) the carrier of the nanometer composite resin is an ion-exchange and adsorption resin having alkali functional group; (2) the internal and external surfaces of the carrier support nanometer sized zero-valent iron series inorganic materials. The zero-valent iron nanometer composite resin is prepared by leading FeCl4 ion onto the internal and external surfaces of the resin by ion-exchange, deoxidizing the FeCl4 ion into nanometer zero-valent iron and obtaining the zero-valent iron carrying nanometer composite resin by washing and drying under the protection of N2. The composite resin integrates the Donnan preenrichment effect of the resin on the inorganic anionic pollutants in the water body and the high-efficient catalytic degradation effect of the nanometer zero-valent iron on the environmental pollutants, overcomes the shortcomings of easy conglobation, unstable chemical property, small particles and big loss of the pressure head of the nanometer zero-valent iron particles and has fast, high-efficient and low-cost catalytic degradation toward the micro-pollutants in the environment.

The invention provides an iron (III) tetracarboxyl phenyl porphyrin implanted metal organic framework composite material preparation method. The method includes: preparing FeTCPPCl from TCPP and FeCl24H2O according to a solvothermal method, and adopting the solvothermal method for implanting FeTCPPCl into a metal organic framework UiO-66 to obtain a composite material FeTCPPCl-UiO-66. By UiO-66 sensitization, light response capacity of UiO-66 is effectively improved, a light absorption range is expanded while charge separation efficiency is improved, and high catalytic activity in Photo-Fenton-like catalytic degradation is achieved. Compared with dark reaction and UiO-66, the composite material has advantages that dye RhB degradation effects are evidently enhanced through light-induced fenton-like reaction, and the RhB degradation rate reaches 100% within 90min.

The invention discloses an industrial organic waste gas catalytic degradation catalyst cooperated with low-temperature plasma, and a preparation method and application of the catalyst. The catalyst comprises a carrier, a main active ingredient and a catalyst promotion ingredient, wherein the carrier is SiC; the main active ingredient is a mixture of at least one kind of noble metal and at least one of transition metal oxide or at least one kind of noble metal or at least one kind of transition metal oxide; the catalyst promotion ingredient is a mixture of at least one kind of rare-earth oxide and alkaline earth oxide or at least one kind of rare-earth oxide or at least one kind of alkaline earth oxide; the main active ingredient accounts for 0.1 to 5 percent of the total mass of the catalyst; the catalyst promotion ingredient accounts for 0.1 to 5 percent of the total mass of the catalyst. The catalyst provided by the invention has the advantages that the preparation is simple; the price is low; the service life is long; the performance is good; the catalyst can be used for high-efficiency removal of industrial VOCs waste gas at room temperature after being combined with plasma; in addition, the discharge of low byproducts is guaranteed.

The present invention discloses a photochemical preparation method of a single atom Au for catalytic degradation of VOCs, and the method includes following steps: step 1, preparation of TiO2 nano-sheets in thickness of atomic scale: (a) adding TiCl3 and ethylene glycol to a reactor, and performing mechanic stirring; (b) filtering a liquid obtained after the above reaction by centrifugation, and then drying separated sediments to remove water; (c) grinding the dried solid, and conducting screening to obtain nano-powder of TiO2; and step 2, loading the single atom Au by a photochemical method. The single atom Au catalyst prepared by the method has high treatment efficiency in processes of plasma catalytic degradation of VOCs (the toluene removal rate is 98.4% and the dichloromethane removal rate is 98.2%). The single atom Au catalyst has long service life (after being used for 200 hours, the removal rate of the single atom Au catalyst on toluene and dichloromethane can reach 94.9% and 97.4%, respectively).