108 results about "Oxidation Activity" patented technology

The invention discloses recombinant human VII type collagen as well as a preparation method and application thereof, and belongs to the technical field of biochemical engineering. The recombinant human VII type collagen comprises a plurality of amino acid residue repetitive units shown as SEQ ID NO.1. Compared with natural VII type collagen, the recombinant human VII type collagen obtained by repeating the repetitive units for multiple times has the advantages that the molecular weight is smaller, the sequence is more easily and efficiently secreted and expressed in a pichia pastoris system after optimization, and the recombinant human VII type collagen can be used for preparing the recombinant human VII type collagen. The method has the characteristics of high yield, low cost, simplicity in operation and easiness in large-scale production. Meanwhile, the anti-oxidation activity is excellent, the skin moisturizing and repairing capacity and the wound healing capacity are promoted, due to the fact that the collagen is derived from human collagen, the risks of allergy and rejection reaction can be remarkably reduced, and the safety is extremely high. Therefore, the recombinant collagen can be used as a core active component to be widely applied to the fields of cosmetics, medicines and the like, and has a good application prospect.

The application discloses a bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst and a preparation method and application thereof. A dimethyl imidazole solution is slowly added into a Mo salt solution to obtain a suspension liquid containing a Mo metal organic framework Mo-MOF; the suspension liquid is left to stand, and a precipitate is centrifuged and washed, and vacuum dried to obtain the Mo-MOF containing the Mo metal organic framework; a Ni salt, an In salt and the Mo-MOF are added into an anhydrous ethanol solution to perform ion exchange, and the precursor is vacuum dried to obtain the bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst. The catalyst material has excellent basic oxygen evolution and urea oxidation activity, and has a good application prospect in electrocatalytic decomposition of water, urea-assisted electrolysis of water and treatment of sewage containing urea.

The present invention relates to a composition, a kit and a detection method for detecting hydrogen peroxide on the basis of self-biotinylation according to the peroxidation activity of a guanine quadruplex, and, more specifically, to a composition, a kit and a detection method for detecting hydrogen peroxide, the composition comprising: i) a guanine quadruplex-hemin complex (G-quadruplex-hemin complex); ii) biotinyl tyramide; and iii) a probe capable of binding to the guanine quadruplex.

This invention provides a composite catalyst, its preparation method, and its application, as well as a method for the catalytic oxidation of alcohols to aldehydes, belonging to the field of organic synthesis technology. In the composite catalyst provided by this invention, elemental chromium improves the dispersibility of elemental silver on modified γ-Al₂O₃, thereby enhancing the oxidation activity of the composite catalyst for ethanol, reducing side reactions (further oxidation of aldehydes to acids or decomposition) during the catalytic oxidation of alcohols to aldehydes, and improving the selectivity, yield, and purity of aldehydes. The modified γ-Al₂O₃ has a more developed pore structure than uncalcined γ-Al₂O₃, and when used as a support, it improves the mechanical strength of the composite catalyst. Moreover, the composite catalyst provided by this invention reduces the reaction temperature and energy consumption for the catalytic oxidation of alcohols to aldehydes without affecting the alcohol conversion rate and aldehyde selectivity, thus reducing the cost of aldehyde preparation and making it more suitable for industrial use in the catalytic oxidation of alcohols to aldehydes.

The present invention relates to novel enzyme nanoparticles capable of converting methane into methanol, in which key active sites of methane-oxidizing bacteria are fused with each other and expressed on a protein that can be self-assembled in cells to form nanoparticles, and specifically to enzyme nanoparticles including a protein having methane monooxygenase (MMO) activity and active sites of the methane oxidase, a method for production thereof, a recombinant microorganism into which a nucleic acid encoding the protein and the active site of the methane oxidase is introduced, and immobilized enzyme nanoparticles including the enzyme nanoparticles loaded on a carrier.

The present application relates to a kind of anti-poisoning catalyst for blast furnace gas organic sulfur hydrolysis and its preparation method.Each component is as follows in percentage by weight: active component K2CO3 4-12%;Active component Cs2CO3 2-5%;Catalyst aid MoO3 3-8%;Catalyst aid La2O3 0.5-2%;Molding aid SiO2 1-5%;And composite metal oxide carrier Al2O3-TiO2 68-89.5%, the pore size of the composite metal oxide carrier Al2O3-TiO2 is three channel distribution.First, composite metal oxide carrier is prepared, and after being formed with silicon dioxide, active component and catalyst aid are impregnated to prepare catalyst.The catalyst prepared by the present application has excellent catalytic hydrolysis activity for organic sulfur in blast furnace gas, and has anti-sulfur, anti-chlorine and anti-oxygen poisoning performance and has persistent catalytic oxidation activity.

The present application relates to the technical field of non-noble metal catalysts, and provides a sulfur-doped cobalt-based material with a core-shell porous structure, which has Co nanoparticles as an inner core, and a porous carbon layer containing Co9S8 coated on the surface of the Co nanoparticles. The present application significantly enhances the catalytic capacity of the material by regulating the micro-morphology and surface active site composition and structure of the material through sulfur doping. On the one hand, the metal sulfide obtained by S doping improves the electrical conductivity of the catalyst, and on the other hand, the S element can regulate the microstructure and morphology of the material due to its strong reducing effect, so that S doping is beneficial to promoting the exposure of active sites and the diffusion of target molecule, thereby significantly enhancing the oxygen molecule activation efficiency and improving the benzyl alcohol oxidation activity and selectivity.

The application discloses a high-entropy cluster electrocatalyst and a preparation method and application thereof, and the high-entropy cluster electrocatalyst comprises a supported substrate of graphene oxide nanosheet and high-entropy clusters in a spinel configuration anchored on the surface of the graphene oxide, and the high-entropy clusters comprise a high-entropy spinel oxide structure composed of multiple metals, wherein the metals are more than five kinds of Co, Mn, Ni, Zn, Cu, Cr and Mg. The application realizes anchoring of the high-entropy oxide clusters on the surface of the graphene oxide, and the multi-component synergistic effect and the heterojunction charge optimization characteristics of the high-entropy oxide clusters improve seawater oxidation activity; the high-entropy stability characteristics and the strong carrier interaction promote the seawater oxidation stability of the catalyst, and the catalyst has better alkaline seawater oxidation performance.

The invention belongs to the field of chemical engineering, and relates to a long-acting anti-oxidation bismuth vanadate pigment for a coating and a preparation method thereof, and the preparation method comprises the following steps: preparing a bismuth vanadate matrix by adopting a sol-gel method; and grafting a tea polyphenol derivative EGCG-COOH on the surface of the bismuth vanadate matrix. According to the long-acting anti-oxidation bismuth vanadate pigment for the coating and the preparation method of the long-acting anti-oxidation bismuth vanadate pigment, the bismuth vanadate matrix is prepared by adopting a sol-gel method, the particle size can be strictly controlled, and excellent optical performance is ensured; rich hydroxyl groups can be formed on the surface of bismuth vanadate prepared by a sol-gel method, so that ester bonds can be formed with carboxyl groups of EGCG-COOH, and the grafting efficiency is improved; eGCG-COOH is used as a bio-based anti-oxidation layer to improve the long-acting anti-oxidation performance of the bismuth vanadate pigment, the release rate of EGCG can be regulated and controlled through carboxyl modification, the anti-oxidation activity is prolonged, and the durability of the anti-oxidation layer is remarkably improved.

The invention discloses a FeOOH / BiVO4 composite photo-anode, a temperature synergistic activation method for optimizing the performance of the FeOOH / BiVO4 composite photo-anode and application of the FeOOH / BiVO4 composite photo-anode, and belongs to the technical field of photoelectric catalytic materials and new energy. The FeOOH / BiVO4 composite photo-anode is formed by loading a cocatalyst layer FeOOH on the surface of a BiVO4 nano-structure substrate. The core of the invention lies in finding that the specific composite photo-anode system has a unique temperature-activity synergistic effect at an electrolyte temperature of about 40 DEG C. At the temperature, the FeOOH cocatalyst and the BiVO4 substrate not only exert respective catalytic advantages, but also realize maximization of interface charge transfer efficiency and remarkable acceleration of reaction kinetics through temperature field regulation and control, so that the photoelectrocatalytic water oxidation activity reaches a peak value, and the stability is far superior to that of a single BiVO4 photoanode. According to the method, a composite material system and the optimal working temperature of the composite material system are accurately matched, so that the cooperation of material design and working condition optimization is realized, and a new technical path and theoretical guidance are provided for developing efficient and stable composite photoelectric devices.

A method for improving the denitrification efficiency of a sulfur autotrophic denitrification and anaerobic ammonia oxidation coupling system comprises the following steps: S1, when the denitrification load is limited and the mass transfer rate in particles is reduced, determining the abundance of filamentous bacteria or determining the length of filaments outside sludge through a molecular biological technique to judge whether the filamentous bacteria overgrow or not; when the abundance ratio of the filamentous bacteria reaches 10%-50% or the length (FLA) of the filamentous substances outside the sludge is 10-50 microns, it can be judged that the filamentous bacteria grow excessively; and S2, continuously adding a hydroxylamine conditioning agent and / or a hydrazine conditioning agent into the reactor, and operating the reactor for 10-30 days. According to the method, excessive reproduction of filamentous bacteria in the coupling system can be effectively controlled, more importantly, the denitrification performance of the coupling system can be improved, the anaerobic ammonia oxidation activity is enhanced, and therefore the operation efficiency of the coupling system is promoted.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a diesel vehicle oxidation catalyst with high NO oxidation performance and a preparation method thereof. The catalyst comprises a carrier, the carrier is coated with an active coating, the active coating comprises precious metal, cerium oxide and silicon-aluminum composite oxide, the mass ratio of the cerium oxide to the silicon-aluminum composite oxide is 1: (49-69), and the coating amount of the precious metal is 0.5-0.9 g / L; the noble metal is Pt and Pd, the mass ratio of the noble metal Pt to the noble metal Pd is (3-9): 1, and the precursor of the noble metal is pretreated for 1-2 hours at normal temperature by using a reducing acid solution. The oxidation catalyst for the diesel vehicle is high in NO oxidation activity and excellent in HC / CO ignition performance, and the preparation process is simple and controllable.

This invention belongs to the fields of industrial hazardous waste resource utilization, photothermal synergistic catalytic materials, and VOCs treatment technology. Specifically, it relates to a VN / GaN aerogel photothermal catalyst based on in-situ vanadium nitridation of spent SCR catalyst, its preparation method, and its application. The preparation method includes: selectively leaching vanadium from spent SCR denitrification catalyst; using vanadium-containing DES leachate directly as a vanadium source and spinning aid, compounding it with gallium nitrate and the spinning aid to prepare an electrospinning precursor solution; obtaining precursor fibers through electrospinning; calcining in air to obtain V2O5 / Ga2O3 nanofibers; high-temperature nitriding with ammonia to form VN / GaN composite nanofibers; and ultrasonic dispersion, aging, and freeze-drying to prepare the aerogel photothermal catalyst. This invention achieves green, high-value, closed-loop utilization of vanadium in hazardous waste, and the prepared aerogel catalyst possesses both excellent photothermal conversion performance and toluene catalytic oxidation activity.

This invention provides a titanium dioxide supported catalyst with titanium vacancies, its preparation method, and its application. The preparation method includes the following steps: (1) mixing titanium dioxide raw material with a fluorine-containing etchant and performing etching treatment; separating the resulting mixture into solid and liquid components; and heat-treating the resulting solid to obtain a titanium dioxide support rich in titanium vacancies; (2) mixing an active metal precursor solution with the titanium dioxide support to load the active component; and activating the solid obtained after solid-liquid separation to obtain a titanium dioxide supported catalyst. This invention provides a simple, low-cost, and easily scalable HF etching method for preparing anatase supports rich in titanium vacancies, thereby obtaining a Pd-based catalyst that possesses ultra-high room temperature formaldehyde oxidation activity requiring only room temperature treatment.

The invention relates to the field of catalytic materials and energy chemical industry, and provides a Pd supported high-entropy oxide catalyst as well as a preparation method and application thereof. Transition metal salt and a precipitator serve as main raw materials, a high-entropy oxide precursor is obtained through a coprecipitation method, a spinel-phase high-entropy oxide carrier (HEOs) Al2O4 is obtained after roasting, and then the Pd-(HEOs) Al2O4 catalyst is obtained through an equivalent-volume impregnation method. According to the catalyst prepared by the invention, the dispersity of Pd is improved through the interaction between the high-entropy oxide carrier and Pd, the number of active centers is increased, meanwhile, the clustering of Pd sites is slowed down, and the stability of the catalyst is improved. Compared with an industrial common Pd-based alumina catalyst, the catalyst has better low-temperature methane oxidation activity, stability and economical efficiency under water-containing and oxygen-enriched conditions.

This disclosure presents a red titanium dioxide heterojunction, its preparation method, and its applications, belonging to the field of materials synthesis and renewable clean energy utilization technology. The preparation method of the red titanium dioxide heterojunction includes: forming a first precursor of boron-doped titanium dioxide; calcining the first precursor at high temperature to obtain a second precursor of the boron-doped titanium dioxide heterojunction; mixing any one of (NH4)2TiF6, NH4TiOF3, and (NH4)2TiOF4 with the second precursor and then nitriding it in an ammonia stream to obtain a red titanium dioxide heterojunction uniformly doped with rutile and anatase phases. This disclosure utilizes ammonium fluorotitanate treatment to nitrid rutile titanium dioxide, forming a red titanium dioxide heterojunction uniformly doped with both rutile and anatase phases, exhibiting high water oxidation activity in photocatalytic water splitting reactions.

This invention discloses a two-dimensional layered ammonia oxidation catalyst based on MXene, its preparation method, and its application in low-temperature ammonia fuel cells. The catalyst comprises an active component and a support. The active component is one or two of the transition metals Pt, Ir, and Pd, and the support is accordion-shaped MXenes. The catalyst support prepared by this invention has a large specific surface area, in which the transition metal nanoparticles are uniformly dispersed and have strong interactions with the MXenes, which can significantly improve its ammonia electrocatalytic oxidation activity, showing good application prospects in ammonia fuel cells.

The application discloses a modified silane coupling agent and a preparation method thereof, an anti-yellowing dealcoholized sealant and application thereof, and a preparation method of the anti-yellowing dealcoholized sealant. The preparation method of the anti-yellowing dealcoholized sealant comprises the following steps: A100, carrying out dehydration homogenization treatment on alpha, omega-dihydroxypolydimethylsiloxane, dimethyl silicone oil and a filler under a vacuum condition to obtain a first base material; A200, blending and treating a part of a crosslinking agent and the first base material under the vacuum condition to obtain a second base material; A300, providing a modified silane coupling agent, blending and treating another part of the crosslinking agent, the modified silane coupling agent and a catalyst under the vacuum condition to obtain the anti-yellowing dealcoholized sealant. The modified silane coupling agent is prepared by blending a silazane compound with a trimethylsilyl group and a silane compound with a primary amino group and a hydrolysable silicon functional group, which is favorable for reducing the amino oxidation activity and thus improving the ultraviolet resistance, thermal oxygen aging capacity and storage stability of the anti-yellowing dealcoholized sealant.

The invention discloses a preparation method of a water-resistant sulfur-resistant ultralow-temperature CO oxidation catalyst. The preparation method comprises the following steps: firstly, preparing an alpha-SiO2 carrier with a rich (101) crystal face by adopting a hydrothermal method; afterwards, an inorganic anchoring-organic grafting strategy is combined, an HF solution is used for conducting functionalization treatment on the surface of alpha-SiO2, methyl silicon trichloride is introduced, a Si-F-O-C-Si bonding structure is constructed, and the precious metal is accurately loaded on the bonding structure by means of a precursor in an organic grafting mode. The Si-F-O-C-Si bond not only regulates the surface electronic structure of alpha-SiO2 and inhibits the adsorption of SO2 on the active site of noble metal, but also can reduce SO2 by carbon atoms to prevent the oxidation process of SO2 on active lattice oxygen on the surface of the carrier; meanwhile, the F-O bond can rapidly provide reactive oxygen species for the Pt site, and CO oxidation reaction is promoted. Based on the design of the water-resistant and sulfur-resistant system, the prepared noble metal-based C-F-alpha-SiO2 catalyst shows excellent CO oxidation activity at the temperature of 80-110 DEG C.

To provide a partial oxidation catalyst capable of partially oxidizing a light hydrocarbon to a synthesis gas with high oxidation activity of the light hydrocarbon and high gas selectivity, a method for producing the synthesis gas, and a method for producing the partial oxidation catalyst.SOLUTION: Provided are: a partial oxidation catalyst for a light hydrocarbon containing a main catalyst containing boron nitride, and at least one metal selected from the group consisting of transition metals of Groups 4 to 9 of the 4th period, transition metals of Groups 4 to 6 of the 5th to 6th periods, and lanthanoid transition metals of the long-period periodic table, on the surface of the main catalyst; a method for producing synthesis gas using the partial oxidation catalyst; and a method for producing the partial oxidation catalyst.SELECTED DRAWING: None

The application discloses a method for preparing 2,5-furan dicarboxylic acid, which comprises the following steps: adding CuO foam catalyst, an aqueous solution of tap water disinfectant and pentahydroxymethyl furfural into an alkaline solution to react and obtain 2,5-furan dicarboxylic acid; the CuO foam catalyst is obtained by calcining foam copper at 200 DEG C to 250 DEG C under an oxygen-containing atmosphere. The method for preparing FDCA by adopting the whole CuO foam catalyst solves the problems of difficult catalyst recovery and separation and serious catalyst waste in the above problems, and has the advantages of high oxidation activity agent stability, mild reaction condition and easy operation.

The application discloses a kind of high-efficiency multi-metal catalyst for synthesizing hexafluoropropylene oxide, and belongs to the field of catalyst preparation.The multi-metal catalyst of the application is Cu, Ce, Mo ternary metal catalyst, comprising: 1wt%-5wt% of Cu, 0.5wt%-3wt% of Ce, 0.1wt%-1wt% of Mo and 85wt%-95wt% of phosphoric acid modified mesoporous silica carrier, wherein, Cu is loaded in the form of nanoparticle with particle size of 5-20nm, Ce exists in the form of cerium oxide, and Mo exists in the form of molybdate.The multi-metal catalyst plays catalytic activity through the oxidation activity of Cu 0 , the oxygen storage capacity of CeO2 and the electronic regulation effect of MoO4 2‑ , is suitable for preparing hexafluoropropylene oxide from hexafluoropropylene gas phase oxidation, has high raw material conversion rate, and can reduce reaction temperature.

The present application relates to the chemical technology field, especially to a high calorific value self-ignition borane ion salt and its preparation method and application. The present application constructs borane cation skeleton and introduces carbon-carbon unsaturated bond by innovatively, uses the electron cloud delocalization effect of unsaturated bond to control the electronic structure of the molecule, reduces the activation energy of oxidation reaction, so as to give the borane ion salt high oxidation activity and self-ignition characteristics, so that it can contact with fuming nitric acid, hydrogen peroxide with a concentration greater than 90% or nitrogen tetraoxide and other strong oxidizing agents to ignite instantly without external ignition source, and still maintains the high calorific value advantage of borane molecule. The results of the examples show that the high calorific value self-ignition borane has a mass calorific value greater than 48.5 kJ / g, and after contacting with red fuming nitric acid, the self-ignition delay time is less than 70 ms; after contacting with 90% H2O2 solution, the self-ignition delay time is not more than 50 ms.

The present application relates to the technical fields of 2,5-dihydroxyterephthalic acid synthesis, and discloses a method for synthesizing 2,5-dihydroxyterephthalic acid, comprising: using succinic acid diethyl ester as a raw material, using trichloroisocyanuric acid or supported trichloroisocyanuric acid as an oxidizing agent, oxidizing the succinic acid diethyl ester in a polar solvent at 50-100 DEG C, then hydrolyzing in the presence of a basic substance, and then acidifying to obtain 2,5-dihydroxyterephthalic acid; the amount of the oxidizing active component trichloroisocyanuric acid in the oxidizing agent is 1-2 times the molar amount of the succinic acid diethyl ester. The synthesis method is green and environmentally friendly, the reaction conditions are mild, the process is simple and easy to operate, the product yield is high, and the method can be applied to actual industrial production.

The application discloses a kind of electric field reinforced catalytic aldehyde removal control methods for formaldehyde efficient removal, it is related to formaldehyde removal technical field, in the purification reactor, pre-adsorption activated carbon block and deep oxidation activated carbon block are oppositely arranged, and opposite reaction cavity is formed between the two;First noble metal catalyst layer and second noble metal catalyst layer are respectively arranged on the surface of pre-adsorption activated carbon block and deep oxidation activated carbon block towards opposite reaction cavity, and activation catalytic reaction zone and mineralization catalytic reaction zone are formed along the flow direction of formaldehyde-containing gas;Through pulse DC power supply, electric field reinforced zone under pulse corona discharge state is formed in opposite reaction cavity, formaldehyde-containing gas is sequentially completed activation and deep oxidation in activation catalytic reaction zone and mineralization catalytic reaction zone after pre-enrichment, can improve formaldehyde removal rate and carbon dioxide selectivity, reduce intermediate product accumulation, and improve continuous operation stability.

The invention discloses a sulfur-resistant CO oxidation catalyst and a preparation method thereof. The catalyst is composed of a date-pit-shaped polycrystal phosphate nanofiber carrier and a noble metal active component loaded on the crystal face at the end of a date pit, the date-pit-shaped polycrystal phosphate nanofiber carrier is formed by one or more of hydroxyl calcium phosphate, iron phosphate or aluminum phosphate, and the noble metal active component is at least one of Pt, Pd, Au and Ru. The preparation method comprises the following steps: in the presence of a polyol surfactant, carrying out periodic oscillation crystallization-segmented calcination to obtain a date-pit-shaped polycrystalline carrier, and directionally anchoring the noble metal on the crystal face at the end part of the carrier through ion exchange. The catalyst prepared by the invention shows excellent CO oxidation activity, sulfur poisoning resistance and long-term stability in sulfur-containing industrial flue gas such as steel sintering flue gas, and is suitable for working conditions of 200-350 DEG C and containing pollutants such as SO2.

The invention discloses a method for improving antioxidant activity of pericarpium citri reticulatae, and belongs to the technical field of pericarpium citri reticulatae aging, the method is as follows: pericarpium citri reticulatae to be aged is sequentially placed in a medium-temperature and high-humidity environment, a medium-temperature and medium-humidity environment and a high-temperature and low-humidity environment for cyclic aging, the temperature of the medium-temperature and high-humidity environment is 15-30 DEG C, the humidity is 60-80%, and the aging time is 3-5 days; the medium-temperature and medium-humidity temperature is 15-30 DEG C, the humidity is 20-50%, the aging time is 5-10 days, the high-temperature and low-humidity temperature is 45-55 DEG C, the humidity is 20-40%, the aging time is 1-3 hours, and the cycle number is 5-12. According to the aging accelerating method, the medium-temperature and high-humidity environment and the medium-temperature and medium-humidity environment are used as main parts, and the high-temperature and low-humidity environment is used as auxiliary parts, so that biochemical reaction in the aging process is promoted and controlled; more high-oxidation active ingredients are obtained, so that the aims of accelerating aging and improving the antioxidant activity are fulfilled.

The invention provides an edible coating material capable of preventing dry loss and resisting oxidation under a low-temperature condition as well as a preparation method and application of the edible coating material, and belongs to the technical field of food coating. According to the edible coating material, the A-type gelatin and the trehalose dihydrate serve as coating matrixes, antioxidant active substance tea polyphenol nano-particles and sustainable release active ingredients are added, a heating reaction is conducted to obtain coating liquid, the coating liquid is sprayed to the surface of food to serve as a coating fresh-keeping material, coating of the food can be effectively achieved, and the edible coating material has the advantages of being environmentally friendly and free of toxic and side effects. A barrier is formed between the food and an air system, so that the storage stability of the food is guaranteed, the dry loss oxidation of the food can be slowed down at the temperature of-20 DEG C to-50 DEG C, the problems of oxidation weight loss, dry loss and the like in the freezing low-temperature storage process of the food are solved, and a new strategy is provided for fresh keeping of the frozen food.

The invention discloses a preparation method of a high-entropy oxide, and belongs to the technical field of limited space peculiar smell treatment. The method comprises the steps that PVP is dissolved in deionized water, the mass ratio of PVP to deionized water is 0.03: 1-0.15: 1, and a PVP solution is obtained; dissolving soluble salt in the PVP solution, and uniformly mixing to obtain a mixed solution A; adding citric acid into the mixed solution A, and uniformly mixing to obtain a mixed solution A '; the mixed solution A'is subjected to dehydration treatment and calcination, so that the high-entropy oxide is successfully prepared, the method is simple in preparation process and low in equipment requirement, the prepared high-entropy oxide is of a stable fluorite configuration and a two-dimensional porous structure, the specific surface area is as high as 98.7 m < 2 > / g, the pore volume is 0.12 cm < 3 > / g, the average pore size is centrally distributed at 4.7 nm, and the high-entropy oxide has good H2S catalytic oxidation activity and stability and is suitable for industrial production. The catalytic oxidation activity is high; the sulfur capacity is large. Meanwhile, the invention also discloses application of the preparation method in removal of low-concentration hydrogen sulfide.

The application discloses a dual-functional catalytic material with a coating structure and a preparation method and application thereof. A silicon source is added into deionized water, mixed uniformly, then a structure directing agent is added, mixed uniformly, and then a cobalt acetylacetone ethanol solution is added to obtain a transparent solution; the transparent solution is crystallized to obtain a solid powder; palladium chloride and o-phenanthroline are dissolved in dimethyl sulfoxide, mixed uniformly to obtain a transparent solution; the solid powder is added into the transparent solution, mixed uniformly, and then heated to 80-120 DEG C, stirred for 6-12 hours, centrifuged, dried to obtain a powder, and the powder is calcined to obtain the dual-functional catalytic material with the coating structure. x The dual-functional catalytic material with the coating structure is constructed by a two-step ligand pyrolysis method, and the synergistic effect of the dual-functional catalytic material with the coating structure makes the dual-functional catalytic material have excellent ethyl acetate deep oxidation activity and stability.