33results about How to "Curb churn" patented technology

The invention discloses a high-entropy ferric pyrophosphate sodium ion battery positive electrode material and a preparation method thereof, and belongs to the field of battery positive electrode materials. The chemical formula of the positive electrode material is Na4Fe3-aMa (PO4) 2P2O7 (0.05 < = a < = 0.5), M is a metal element and comprises at least five of cobalt, magnesium, zirconium, zinc, aluminum, molybdenum, copper, manganese, nickel, calcium and chromium, the high-entropy ferric sodium phosphate pyrophosphate battery positive electrode material is spherical, and the surface of the high-entropy ferric sodium phosphate pyrophosphate battery positive electrode material is coated with an amorphous carbon layer. The preparation method adopts a sol-gel method and comprises the following steps: mixing an iron source, a doped metal source, sodium pyrophosphate, ammonium dihydrogen phosphate and citric acid monohydrate according to a stoichiometric ratio, stirring, gelatinizing and drying to obtain xerogel, and calcining through a two-stage hydrogen-argon mixed gas to obtain the iron-doped metal-doped sodium pyrophosphate / citric acid composite material. The crystal structure is optimized by means of the high-entropy synergistic effect, the electron conductivity and the Na < + > diffusion rate are improved, and the industrial adaptability of the spherical morphology and the structural stability of carbon coating are combined.

The invention provides a fuel cell ORR catalyst and a preparation method and application thereof. The fuel cell ORR catalyst comprises a nitrogen-doped porous carbon core, a nitrogen-doped porous carbon coating layer arranged on the surface of the nitrogen-doped porous carbon core, and doped metal simple substances distributed in pore channels of the nitrogen-doped porous carbon core and the nitrogen-doped porous carbon coating layer, the ratio of micropores in the nitrogen-doped porous carbon core is gt; the total proportion of mesopores and macropores in the nitrogen-doped porous carbon core; the ratio of micropores in the nitrogen-doped porous carbon coating layer is lt; the total ratio of mesopores to macropores in the nitrogen-doped porous carbon coating layer is 1: 1. The nitrogen-doped porous carbon structure monatomic catalyst with multiple micropores inside and multiple mesopores / macropores outside is obtained through gradient pore channel design in space in combination with a CVD coating technology, and dissolution and loss of metal elementary substances are greatly inhibited while the catalytic activity of the catalyst is guaranteed, so that the service life of the catalyst is prolonged.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention relates to the technical field of surface modification, and discloses a surface modification method based on an ion implantation method, which comprises the following steps: carrying out surface pretreatment on a titanium-based or cobalt-chromium-based implant; forming an interface steady-state layer by adopting low-energy nitrogen ion implantation; low-concentration oxygen ion co-injection is carried out on the steady-state layer to form a discontinuous anti-migration blocking layer; calcium ions, zinc ions and silver ions are injected in sequence, and a depth gradient structure from inside to outside is obtained through biphase modulation bias voltage; then implementing oxygen ion directional injection to form a non-stoichiometric oxide layer; performing alternating electric field aging in a water vapor and phosphate atmosphere to construct an ion trapping layer; and finally, sterilizing and sealing the treated workpiece. By constructing a multi-layer synergistic structure and a dynamic ion regulation and control mechanism, migration and agglomeration of functional ions can be slowed down, and the long-term stability of the surface of the implant is improved.

This invention discloses a low surface energy active-passive synergistic antifouling coating and its preparation method, belonging to the field of marine antifouling materials technology. The preparation method of the antifouling coating includes the following steps: S1, mixing acetone and xylene and stirring under a nitrogen atmosphere to form a mixed solvent; S2, adding vinyl-terminated silicone resin and acrylic resin to the mixed solvent, stirring and heating to obtain a coating base liquid; S3, adding an initiator to the coating base liquid and continuously stirring and heating to react; S4, after the reaction is complete and the coating base liquid cools, adding functional fillers to form a coating liquid; S5, coating the coating liquid and drying to obtain a low surface energy active-passive synergistic antifouling coating. The low surface energy active-passive synergistic antifouling coating prepared by this invention solves the problem in existing marine antifouling technologies where the single antifouling mechanism prevents the simultaneous consideration of environmental friendliness and long-term effectiveness, and has broad application prospects in the field of marine antifouling materials technology.

The invention discloses low-carbon coconut fiber modified ardealite vegetation concrete and a preparation method thereof. The ardealite vegetation concrete is prepared from the following components in parts by mass: 10 to 15 parts of anhydrous ardealite, 65 to 80 parts of natural aggregate, 0.5 to 2.5 parts of carbide slag, 3 to 9 parts of mineral powder, 0.07 to 0.5 part of alkali modified coconut fiber and 0.1 to 0.5 part of water reducing agent. The low-carbon coconut fiber modified ardealite vegetation concrete has excellent mechanical properties, ecological compatibility and durability, and the preparation method is simple, low in cost and suitable for industrial application.

The invention discloses a copper-silicon catalyst for plasma treatment as well as a preparation method and application of the copper-silicon catalyst. According to the method, a copper-silicon catalyst precursor prepared by a traditional ammonia distillation method is subjected to dielectric barrier discharge plasma treatment in the atmosphere of H2 / Ar and the like, and traditional high-temperature roasting and reduction processes are replaced. According to the method, efficient reduction and high dispersion of copper can be achieved at the room temperature, the Cu < + > / Cu0 proportion is regulated and controlled, and the strong interaction between metal and a carrier is enhanced. The catalyst is used in a reaction for preparing ethylene glycol through hydrogenation of dimethyl oxalate, the activity, selectivity and stability of the catalyst are higher than those of a traditional heat treatment catalyst, the dimethyl oxalate conversion rate reaches up to 100%, the ethylene glycol selectivity is larger than 97%, and the stability reaches 1000 h or above. The method is simple in process, low in energy consumption and environment-friendly, and has a wide industrial application prospect.

This invention discloses a cerium-doped calcium-based photothermal catalyst supported on carbon nanotubes and its application in the preparation of biodiesel, belonging to the field of catalysis technology. The photothermal catalyst is prepared by the following method: a calcium source and a cerium source are mixed and dissolved in an aqueous ethanol solution, then multi-walled carbon nanotubes are added and stirred to load the calcium and cerium sources onto the surface of the multi-walled carbon nanotubes. The mixture is then dried to remove the solvent; calcined under nitrogen protection; and after calcination, naturally cooled to obtain the cerium-doped calcium-based photothermal catalyst supported on carbon nanotubes. This invention utilizes the strong electronic interaction between cerium and calcium to regulate the structure of active sites, inhibiting the aggregation and loss of active components, while simultaneously enhancing the catalyst's broad-spectrum light absorption and photothermal conversion capabilities, thereby achieving efficient and green biodiesel production.

The application discloses instant flower glue with high elasticity and high glycosaminoglycan retention rate and a preparation method thereof. After cleaning and steaming of the flower glue, the flower glue is soaked in water below 20 DEG C, then mixed and dissolved with donkey-hide gelatin instant powder, milk and granulated sugar, sealed, filled and sterilized, and finally cooled by water cooling, with the cooling rate controlled within 10-15 DEG C / min, so that the center temperature of the product is steadily decreased to 25+ / -0.5 DEG C, and the instant flower glue is prepared. The instant flower glue prepared by the method has excellent texture characteristics, Q elastic and smooth, and does not stick to teeth. The flower glue has good water retention, and the proportion of free water is as high as 85% or more. Most importantly, the method maximally retains glycosaminoglycan in the flower glue, and the degradation of active ingredients such as chondroitin sulfate is reduced, and the dry base content is high.

This invention relates to a Ru / C cluster catalyst for the electrocatalytic PTA-to-CHDA reaction, its preparation method, and its application. The method employs a molten salt electrolyte containing carbonate; a Ru-containing compound and a morphology control agent are mixed with the molten salt electrolyte; heating is performed to form an ion-conducting molten electrolyte system; electrolysis at constant potential or constant current allows the Ru element in the precursor and the C element in the carbonate to be co-electrodeposited on the cathode surface, forming a supported metal catalyst; after electrolysis, cooling is performed, and the catalyst is collected from the cathode, washed, and dried to obtain the supported metal catalyst. This invention provides a one-step in-situ generation of amorphous carbon-supported supported Ru / C catalysts, effectively simplifying the complex multi-step preparation process of traditional catalysts, reducing energy consumption and production costs, and solving the problem of existing technologies struggling to prepare Ru-group cluster catalysts with uniform size, good dispersibility, and high stability.

The invention discloses an activated clay catalyst for removing trace olefin in reformate and a preparation method, and relates to the technical field of petrochemical industry. The catalyst has a core-shell structure, the core is activated clay loaded with L acid, and the shell layer is amorphous solid aluminosilicate; the preparation method comprises the following steps: acidifying and activating montmorillonite raw ore to obtain activated clay, carrying out ball-milling compounding on the activated clay and haloid to obtain composite clay nanoparticles, carrying out tetraethyl orthosilicate liquid phase deposition and roasting to obtain modified composite clay nanoparticles, and finally, carrying out hydrothermal crystallization and roasting on the modified composite clay nanoparticles, a template agent and aluminum hydroxide to obtain the modified montmorillonite composite material. The activated clay catalyst is obtained. The acidity of the catalyst is improved by loading the L acid, the catalytic performance can be further enhanced by the coated amorphous solid aluminosilicate, and when trace olefin in reformate is removed, the catalyst shows excellent catalytic activity and longer service life.

The present application relates to a kind of 3-hydroxypropionic acid methyl ester hydrogenation 1,3-propanediol catalyst and its preparation method and application.Silica is used as structure carrier, copper is used as active component, and zinc zirconium magnesium oxide is used as auxiliary agent to prepare multi-metal composite catalyst using gel precipitation method.The multi-metal composite catalyst prepared using gel precipitation method has high active metal dispersion, strong metal and carrier binding force, and by introducing magnesium oxide as catalyst structure auxiliary agent, silicon loss during catalyst reaction can be effectively reduced, high yield of 1,3-propanediol is ensured, and excellent structural stability is obtained, so the application prospect is wide.

The application belongs to the technical field of bioengineering, and particularly relates to a Terminalia chebula Retz. fruit nano vesicle, a preparation method thereof and application of the nano vesicle in anti-skin aging products. In the application, a composite enzyme preparation containing ferulic acid esterase is used to perform enzymolysis on Terminalia chebula Retz. fruit raw materials, sodium alginate and a calcium chloride solution are added to the enzymolysis liquid after the enzymolysis, and the nano vesicle is subjected to precipitation treatment; finally, a sodium carbonate or sodium bicarbonate solution is used to treat the precipitate, the mixture is fully stirred, centrifuged, and the supernatant is collected to obtain a purified product of the Terminalia chebula Retz. fruit nano vesicle. The preparation method of the Terminalia chebula Retz. fruit nano vesicle provided by the application is efficient and low in cost, the nano vesicle obtained has a high miRNA content, animal experiments show that the nano vesicle can reduce the content of IL-6 inflammatory factors in the skin tissue of experimental animals, reduce the loss of collagen caused by ultraviolet rays, has significant anti-aging and light-aging alleviating effects, and can be applied to functional skin care products.

The application discloses a method for promoting As oxidation by activating goethite with antibiotic molecules, and comprises the following steps: S1, goethite preparation; S2, adjusting the pH of a solution containing antibiotic molecules and trivalent arsenic to 5.5-6.5, adding goethite, and carrying out reaction in dark at 23-27 DEG C and 150-190 rpm for 2-72 h to realize the activation of goethite by antibiotic molecules and further complete As oxidation; wherein the concentration of antibiotic molecules in the solution is 45-55 mu M, the concentration of trivalent arsenic is 2.67 mu M, and the adding ratio of goethite to the solution to be treated is 30-50 mg:20 ml; the application firstly proposes that antibiotic molecules can complex and reduce the surface Fe(III) of goethite to generate Fe(II), further promotes the oxidation of As(III), and provides a brand-new treatment mode for the pollution conversion of composite pollutants.

The invention belongs to the technical field of raffinate acid purification, relates to an extraction agent for raffinate acid purification and a preparation method thereof, and has the advantages that the composite extraction agent is synthesized by taking sulfonated dopamine, mesoporous silica, a hydroximic acid compound, glutaraldehyde and the like as raw materials. The mesoporous silica is used as a high-performance carrier, and a 2-5nm mesoporous structure of the mesoporous silica provides abundant active sites and mass transfer channels; based on the carrier, a sulfonic acid group is introduced into dopamine molecules through sulfonation modification, the material is endowed with excellent ion exchange performance, and a stable complex is formed by grafting a functional monomer containing a hydroximido group and utilizing the bidentate chelation of the hydroximido group and heavy metal ions; finally, glutaraldehyde is added to serve as a cross-linking agent, a three-dimensional network structure is constructed through cross-linking, the structure can fix sulfonic acid groups and hydroximido groups, metal ion complexing sites can be further increased, the complexing capacity is enhanced, and finally synchronous and efficient extraction of the acid and the heavy metal ions in the raffinate acid is achieved.

The invention belongs to the technical field of sodium ion batteries. The invention provides a sodium ion all-solid-state battery positive electrode preparation method, which comprises: S1, coating the surface of chromium-doped sodium nickel manganese oxide with a Na3Al2 (PO4) 3 and sodium dodecyl phosphate composite layer to obtain a modified chromium-doped sodium nickel manganese oxide material; s2, the modified chromium-doped sodium nickel manganese oxide material obtained in the S1, graphite, polyvinylidene fluoride and N-methyl pyrrolidone are mixed according to the mass ratio of 8: (1.4-1.6): (0.75-0.85): (3.8-4.2), and slurry is obtained; and S3, coating an aluminum foil with the slurry obtained in the step S2 to prepare a positive electrode plate, then drying the positive electrode plate, and punching the positive electrode plate into a circle to obtain the sodium ion all-solid-state battery positive electrode with the surface loading capacity of 5.4-6.2 mg / cm < 2 >. According to the invention, the capacity retention ratio of the sodium ion solid-state battery can be effectively improved.

This invention relates to the field of catalyst technology, specifically to a method for preparing and applying a modified metal sulfide catalyst for the co-conversion of acidic natural gas. The preparation method includes: S1. Dissolving ammonium molybdate tetrahydrate in a modified solvent and stirring until completely dissolved to obtain a transparent and homogeneous solution; S2. Adding 2-3 parts of a modified support precursor to the solution and transferring it to an autoclave for reaction for 22-24 hours; S3. Centrifuging the solution and washing the precipitate 2-3 times with deionized water and anhydrous ethanol, respectively, followed by drying and grinding to obtain the modified metal sulfide catalyst. This invention utilizes concentrated light technology to synergistically apply light and heat energy to the reaction system, achieving high-efficiency conversion at a lower temperature (450-550℃) and atmospheric pressure compared to traditional thermocatalysis, significantly reducing energy consumption. It is the first catalyst designed for CH4. 4 and H 2 A metal sulfide composite catalyst system for S-concentrated photocatalytic co-conversion converts two harmful / low-value gases into high-value CS in one step. 2 and clean H 2 This has enabled "waste treatment" and resource recycling.

The utility model relates to a kind of phenolic wastewater treatment catalytic / filter coupling device, it relates to a kind of phenolic wastewater treatment device.The utility model is to solve the technical problems that the existing catalytic oxidation-membrane separation coupling process exists unit long, catalyst loss and membrane pollution.The utility model first couples sludge biochar catalytic oxidation and microfiltration membrane in same device, with integrated design significantly shorten process, reduce dead volume and energy consumption;Through the three-stage gradient interception structure of hierarchical aperture metal screen-PP cotton-microfiltration membrane, form the particle size barrier from bottom to top, synergistically inhibit the loss of sludge biochar and membrane pollution, so that sludge biochar maintains high activity in continuous operation, to ensure water quality while extending the stable operation period of system, provide new technical paradigm for the economic and efficient advanced treatment of phenol-containing wastewater.

The application provides a lithium-rich manganese-based composite positive electrode material and a preparation method and application thereof. The lithium-rich manganese-based composite positive electrode material comprises a lithium-rich manganese-based matrix material core and a high-entropy oxide material coated on the surface of the core; and metal elements in the high-entropy material include Mg, Zn, Cu and Nb. The positive electrode material provided by the application can inhibit the migration of transition metals in the positive electrode material and the loss of oxygen through the synergistic cooperation of Mg, Zn, Cu and Nb in the surface layer high-entropy oxide material, and the electronic conductivity is also improved, so that the cycle performance and rate performance of the lithium-rich manganese-based composite positive electrode material are greatly improved.

This utility model relates to the field of slope protection board technology, and more particularly to a waterproof slope protection board for preventing soil erosion. The technical solution includes a board body, a locking block fixedly disposed on one side of the board body, a limiting insertion hole on one side of the locking block, and a locking groove on the side of the board body away from the locking block; an insertion block disposed on one side of the board body, and a slot on the side of the board body away from the insertion block; a guide groove inside the board body, and a sliding groove on one side of the board body, the sliding groove communicating with the guide groove, and a connecting component for interlocking is disposed inside the guide groove. This utility model enhances the vertical connection constraint, effectively preventing the slope protection board from misaligning or separating vertically when the slope is eroded by rainwater or subjected to gravity, improving the integrity and stability of the slope protection structure, reducing direct erosion of the soil by rainwater, and preventing soil particle loss, thereby effectively curbing soil erosion and protecting the slope ecology.

The invention belongs to the technical field of fuel cell proton exchange membranes, and discloses a PBI-SO2-Cl / UiO-66-NH2 (at) CNT composite proton exchange membrane and a preparation method thereof. According to the PBI-SO2-Cl / UiO-66-NH2-coated CNT proton exchange membrane disclosed by the invention, UiO-66-NH2-coated CNT is stably fixed into a PBI-SO2-Cl polymer through a covalent bond, a sulfonyl chloride group in the PBI-SO2-Cl and an amino group in the UiO-66-NH2-coated CNT form a sulfonyl imide group, chemical crosslinking is enhanced, and UiO-66-NH2 grows on CNT-COOH, so that particles in a free state are greatly reduced, loss of the particles is inhibited, and the proton exchange membrane has the advantages that the proton exchange membrane has a good proton exchange effect on the CNT-COOH and the UiO-66-NH2-coated CNT proton exchange membrane is prepared. The stability and proton conductivity of the composite membrane are enhanced, and the proton exchange membrane has a good application prospect in the aspect of high-temperature proton exchange membrane fuel cells.

The application discloses application of ZnFeGaO4 spinel oxide in a carbon dioxide hydrogenation reaction and belongs to the technical field of catalysts. 2+ The method realizes flexible switching of a reaction path in the same catalyst system, and the catalyst has excellent catalytic activity and structural stability, and the application provides a novel strategy for designing a high-efficiency and high-selectivity carbon dioxide conversion catalyst.

The application discloses a water purifying agent preparation process for organic matter degradation in fish culture tail water, which comprises the following steps: (1) placing vitrified microbeads in hydrofluoric acid for stirring treatment to perform surface etching, and then separating the vitrified microbeads to wash and dry, so as to obtain pretreated vitrified microbeads; (2) mixing the pretreated vitrified microbeads, tetraethyl titanate and anhydrous ethanol, and then performing ultrasonic treatment, and then mixing the obtained microbeads with a carbon source, urea and clean water to perform hydrothermal reaction, so as to obtain a catalyst; and (3) mixing the catalyst, plastic powder, modified halloysite powder, original halloysite powder and glycerol diluent, and then granulating, and then heating and keeping warm of the obtained granular matters in a protective atmosphere, and then placing the obtained granular matters in clean water to stand, and then separating the granular matters to dry, so as to obtain the water purifying agent, which can not only perform efficient photocatalytic degradation on organic matter degradation, but also can be recycled and reused.

The application provides a copper-based alloy for brazing of hard alloy and a preparation method and application thereof, and relates to the technical field of brazing. Specifically, the copper-based alloy comprises the following elements in percentage by weight: Zn 25-40%, Mn 1-10%, Si 0.1-2%, Co 0.1-2%, Cr 0.1-1%, Zr 0.01-0.5%, Nb 0.01-0.5%, and the balance of Cu. Meanwhile, the application provides a specific preparation process of the copper-based alloy. By optimizing the relative content of zinc and manganese elements, and by adding silicon, cobalt, chromium, zirconium and niobium elements to refine the alloy structure, the copper-based alloy has good mechanical strength, welding performance and wetting performance when brazing hard alloy workpieces, and has a good application prospect.

The application relates to a Co-SACs@UIO-66 modified Ti / SnO2-Sb anode and a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. The anode comprises a Ti / SnO2-Sb electrode substrate and Co-SACs@UIO-66 material loaded on the surface of the electrode substrate. The preparation method is as follows: Co-SACs@UIO-66 material is prepared by solvothermal reaction of a zirconium source, terephthalic acid and a cobalt salt with the addition of acetic acid, and then the Co-SACs@UIO-66 material is spin-coated on the surface of the Ti / SnO2-Sb electrode substrate. The anode can electrochemically synergistically catalyze degradation of sulfadiazine in the presence of persulfate, the degradation rate is greater than 99% within 30 min, the reaction rate constant is 0.135 min ‑1 , the degradation rate still remains above 95% after five cycles, and the cobalt ion leaching concentration is only 0.007 mg / L.

The invention relates to the technical field of electro-catalysis, and discloses a water electrolysis hydrogen evolution method which comprises the following steps: under a water electrolysis condition, taking a water electrolysis hydrogen evolution catalytic electrode as a working electrode to carry out water electrolysis reaction; wherein the water electrolysis hydrogen evolution catalytic electrode comprises a conductive substrate and a catalytic material compounded on the surface of the conductive substrate, and the catalytic material comprises a carbon-coated platinum-based alloy nano material and conductive carbon black; wherein the carbon-coated platinum-based alloy nano material contains a platinum-metal M alloy particle inner core and a graphitized carbon layer coated on the surface of the platinum-metal M alloy particle inner core, and the metal M is selected from at least one of Ni, Co and Zn. The water electrolysis hydrogen evolution method provided by the invention has relatively low reaction overpotential and relatively high reaction activity and stability.

The invention relates to the technical field of preparation of lithium battery positive electrode materials, in particular to a composite modified ultrahigh-nickel ternary positive electrode material and a preparation method and application thereof. The preparation method of the material comprises the following steps: synthesizing a tungsten-doped high-nickel ternary precursor from a mixed metal salt solution and a tungsten source through a coprecipitation reaction; mixing and sintering the precursor and a lithium source to obtain a base material; the preparation method comprises the following steps: mixing a matrix material with a solution containing a titanium source and a phosphorus source, carrying out solvent evaporation, and carrying out heat treatment at 400-600 DEG C to prepare the composite modified ultrahigh-nickel ternary positive electrode material. According to the invention, through the synergistic effect of bulk phase doping of tungsten and in-situ reaction of titanium and a phosphorus source on the surface to form a coating layer, the interface stability and bulk phase structure stability of the material are remarkably improved. The method is simple in process, and the obtained positive electrode material has high specific capacity and excellent cycle performance.

The application discloses a heteroatom conjugated extended asymmetric viologen derivative, a preparation method thereof and application of the viologen derivative in a black electrochromic device, and has the general structure as shown in the following formula: wherein Ar represents a benzothiadiazole or a thiophene heteroatom conjugated bridging unit, R1 is a benzyl aromatic substituent, and R2 is a polymerizable alkenyl functional group. The viologen molecule is designed through a conjugated skeleton of "acceptor-bridge-acceptor", a molecular internal charge transfer effect is significantly enhanced, and a reduced state absorption spectrum is effectively widened. The viologen molecule is compounded with a complementary agent for an electrochromic device, spectrum complementary absorption of the two in an ultraviolet-visible light region is utilized, full spectrum coverage in a visible light band is realized, and a high-performance black electrochromic effect is obtained. The material system has wide application prospects in the fields of flexible intelligent display, self-adaptive camouflage, full-shading intelligent window and the like.

The application belongs to the field of carbon monoxide treatment and catalytic oxidation in sintering flue gas, and discloses a preparation method and application of a ceria-supported bimetallic catalyst. A cerium source, a surfactant, a complexing agent and a crosslinking agent solution are mixed, and the pH is adjusted to make metal ions form hydroxide precipitates to obtain a precursor turbid solution. After hydrothermal reaction, the precursor turbid solution is filtered, washed, dried, ground and calcined to obtain a precursor powder. The precursor powder is dispersed, and a bimetallic solution is gradually added dropwise. The ceria-supported bimetallic catalyst is obtained through drying and calcination treatment. 3+ The surfactant, the complexing agent and the crosslinking agent are introduced to synergistically regulate Ce Hydrolysis, inhibit grain growth and construct three-dimensional network limited space, obtain small grain, large specific surface area, rich in defects of ceria carrier, make it uniform dispersion, enhance metal-support interaction, promote alloy phase or hetero-interface formation, so as to significantly improve the stability of catalytic active center, selectivity.

The application provides an ammonium ion exchange method and device of Y-type molecular sieve, and the method comprises the following steps: step 1, forming a NaY molecular sieve filter cake layer by using a slurry of NaY molecular sieve; step 2, mixing and beating the NaY molecular sieve with an ammonium salt solution to form an NH-NaY molecular sieve filter cake layer on the NaY molecular sieve filter cake layer, and obtaining a composite filter cake; and step 3, performing ion exchange on the composite filter cake obtained in step 2 by using the ammonium salt solution, and performing calcination to obtain ammonium-exchanged Y-type molecular sieve. The Y-type molecular sieve ammonium ion exchange method provided by the application realizes high utilization of ammonium salt in the NaY molecular sieve exchange process by using NaY filter cake layers and humic acid to recover the lost ammonium in the filtrate.