209 results about "Cerium(IV) oxide" patented technology

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The invention relates to the technical field of biodiesel hydrogenation catalysts, and particularly discloses a hydrogenation catalyst of organic bentonite loaded cerium-zirconium solid solution and nickel-molybdenum phosphide as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst with the organic bentonite loaded with the cerium-zirconium solid solution and the nickel-molybdenum phosphide comprises an organic bentonite carrier, the cerium-zirconium solid solution and the nickel-molybdenum phosphide, the loading capacity of the cerium-zirconium solid solution on the organic bentonite carrier is 2-2.5 wt%; the cerium-zirconium solid solution comprises cerium dioxide and zirconium dioxide; the loading capacity of the nickel molybdenum phosphide on the organic bentonite carrier is 10-15 wt%; and the nickel molybdenum phosphide is Ni2Mo3P. The organobentonite carrier provides an acid site and promotes deoxidation path optimization, the layered structure of the organobentonite carrier can limit the cerium-zirconium solid solution and the nickel-molybdenum phosphide, and organic groups are also embedded into the layered structure, so that the organic compatibility of the organobentonite carrier to biodiesel is improved, and the catalytic efficiency is improved. The cerium-zirconium solid solution provides oxygen vacancies, promotes hydrogenation / deoxidation, and improves the thermal stability and sintering resistance of the catalyst.

The invention discloses high-toughness ultrathin flexible glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The ultrathin flexible glass is prepared from the following raw materials: silicon dioxide, aluminum oxide, lithium oxide, sodium oxide, magnesium oxide, a modified nano reinforced phase, a high-temperature melting regulator and cerium dioxide. The modified nano reinforced phase is prepared by the following steps: pre-treating silicon carbide and silicon nitride with hydrochloric acid, and mixing with nano zirconium oxide to obtain a mixture; and modifying the mixture with a silane coupling agent to obtain the modified nano reinforced phase. The high-temperature melting regulator is a mixture of lithium borate, sodium sulfate and lithium fluoride. The preparation method of the ultra-thin flexible glass comprises the following steps: preparing the modified nano reinforced phase, melting and homogenizing the glass, forming the glass substrate, and preparing the ultra-thin flexible glass. The ultra-thin flexible glass prepared by the invention has relatively high fracture toughness and structural rigidity, excellent flexibility and bending fatigue durability, and excellent thermal shock resistance.

The invention discloses a corrosion-resistant aluminum alloy profile and a preparation method thereof, and belongs to the technical field of aluminum alloy profiles. By optimizing the components of the corrosion-resistant aluminum alloy, the strength of the aluminum alloy profile can be guaranteed, and the corrosion resistance of the aluminum alloy profile is positively influenced. Besides, the corrosion-resistant coating is formed on the surface of the corrosion-resistant aluminum alloy base material in a laser cladding mode, the corrosion resistance of the aluminum alloy profile can be remarkably improved while the application performance of the aluminum alloy profile is guaranteed, and in the corrosion-resistant coating, nickel powder can enhance pitting corrosion resistance and intergranular corrosion resistance, so that the corrosion resistance of the aluminum alloy profile is improved. The adhesive force with an aluminum alloy base material is improved; the boron nitride can improve the acid resistance and wear resistance of the surface of the aluminum alloy profile and block a corrosion channel; the lanthanum oxide and the cerium dioxide have a synergistic effect, so that surface grains can be refined, air holes generated in the cladding process are reduced, the compactness of the coating is improved, the compatibility with an aluminum alloy base material is promoted, and the apparent quality of the aluminum alloy profile is guaranteed.

The invention discloses a polyetherketoneketone high-temperature-resistant wear-resistant non-stick coating and a preparation method thereof. The coating is prepared from the following components in parts by mass: 13 to 30 parts of a resin matrix group (containing 12 to 25 parts of titanium modified polyether ketone ketone resin, 1 to 5 parts of fluorine-free viscous resin and 0.65 to 6 parts of aluminum oxide), 0.5 to 3 parts of a nano reinforced group (containing 0.5 to 3 parts of KH-550 modified nano titanium dioxide, 0.025 to 0.6 part of cerium dioxide and 0.5 to 3 parts of boron nitride) and 62 to 71 parts of an auxiliary agent group. The preparation method comprises the following steps: 1) taking diphenyl ether, paraphthaloyl chloride and isophthaloyl chloride as monomers, and synthesizing titanium modified polyether ketone ketone resins with different viscosities through segmented polymerization (1.5-2.0 hours or 3.0-4.0 hours); 2) respectively preparing a smooth bottom layer water dispersion slurry and a wrinkled surface layer water dispersion slurry; and (3) forming a compact bottom layer and a micro-wrinkle surface layer on the base material by adopting a layered spraying and stepped sintering process (280-320 DEG C, 10-20 minutes). The whole system of the coating is fluorine-free and has temperature resistance gt; the coating has the characteristics of high temperature resistance (350DEG C), wear resistance (Taber wear rate of 3-5mg / 1000r), non-sticking (contact angle gt, 100 DEG C) and heavy corrosion resistance, and is suitable for cooking utensils and chemical equipment.

The invention discloses high-strength high-temperature-resistant fireproof industrial glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The industrial glass is prepared from the following raw materials: silicon dioxide, boric oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, a composite reinforcing component and a clarifying agent, the composite reinforcing component is prepared from hafnium oxide, gadolinium oxide and zinc oxide; the clarifying agent is obtained by mixing cerium dioxide and tin oxide. The preparation method of the industrial glass comprises the following steps: preparing functional components, melting glass, forming a glass substrate, and preparing the industrial glass. The prepared industrial glass is high in strength, good in high-temperature stability and excellent in fireproof performance.

The invention relates to a high-gloss black decorative glass prepared from sludge incineration ash by an all-electric melting method. The high-gloss black decorative glass comprises the following raw material components in percentage by mass: 75-79% of fly ash, 5-7% of calcium carbonate, 9-10% of sodium carbonate, 5-6% of potassium alkali, 1-1.4% of boric acid, 0.03-0.04% of porous carbon, 0.06-0.08% of semi-coke powder, 0.16-0.22% of cobaltosic oxide, 0.1-0.2% of cerium dioxide, 0.04-0.06% of neodymium oxide, 0.5-0.7% of waste zircon brick powder and 0.03-0.05% of yttrium oxide. The dedusting ash is electrostatic dedusting ash collected by incineration of filtered sludge in a municipal sewage treatment plant, and belongs to hazardous waste; the porous carbon is rich in a hierarchical pore structure of sub-nano pores (0.5-1.0 nm). According to the method, a closed-loop production mode that waste is used for treating waste is constructed, high-added-value decorative materials are produced while energy consumption is reduced, and environmental protection investment is converted into economic benefits.

The invention relates to the technical field of biomass-based semiconductor bifunctional materials and environmental restoration, in particular to a Baijiu vinasse biochar / cerium oxide / cadmium zinc sulfur solid solution heterojunction bifunctional material as well as a preparation method and application of the Baijiu vinasse biochar / cerium oxide / cadmium zinc sulfur solid solution heterojunction bifunctional material. The method comprises the following steps: in an inert atmosphere, carrying out pyrolysis on waste Baijiu vinasse to obtain biochar; the method comprises the following steps: mixing biochar and an activator, and carrying out activation pyrolysis in an inert atmosphere to obtain alkali-activated biochar; the preparation method comprises the following steps: dispersing a cadmium source, a zinc source, thiourea, a surfactant, alkali-activated charcoal and cerium dioxide in a solvent to form a dispersion liquid, and carrying out a heating reaction to obtain the Baijiu vinasse charcoal / cerium oxide / cadmium-zinc-sulfur solid solution heterojunction bifunctional material. The adsorption performance of the material is improved due to the remarkable specific surface area of the alkali-activated biochar component; the construction of the cerium oxide / cadmium zinc sulfur solid solution heterojunction significantly accelerates the migration of photon-generated carriers, endows the material with excellent adsorption-photocatalytic performance, has good reusability, and can remove pesticide pollutants in water.

The application discloses a kind of corrosion-resistant aluminum alloy profiles and preparation method thereof, belong to aluminum alloy profile technical field.The application can ensure the strength of aluminum alloy profile by optimizing the composition of corrosion-resistant aluminum alloy, and has a positive effect on the corrosion resistance of aluminum alloy profile.In addition, the application forms a corrosion-resistant coating on the surface of the corrosion-resistant aluminum alloy substrate by laser cladding, which can significantly improve the corrosion resistance of the aluminum alloy profile while ensuring the application performance of the aluminum alloy profile.In the corrosion-resistant coating, nickel powder can enhance the resistance to pitting and intergranular corrosion, and improve the adhesion to the aluminum alloy substrate.Boron nitride can improve the surface acid resistance and wear resistance of the aluminum alloy profile, and block the corrosion channel.Lanthanum oxide and cerium dioxide have a synergistic effect, which can refine the surface grains, reduce the pores generated during the cladding process, improve the compactness of the coating, promote the compatibility with the aluminum alloy substrate, and ensure the appearance quality of the aluminum alloy profile.

The invention belongs to the field of water pollution treatment, and particularly relates to a method for degrading chlorophenol organic pollutants in water by activating persulfate with a cobalt-cerium dioxide monatomic catalyst in the presence of bicarbonate radicals. According to the invention, cerium nitrate hexahydrate is calcined in a muffle furnace to obtain cerium dioxide. A catalyst precursor is prepared by a traditional isovolumetric impregnation method. The prepared catalyst precursor is annealed at different temperatures to obtain a series of catalysts, the catalytic performance of Co1-CeO2-700 is optimal, and the Co1-CeO2-700 has more excellent catalytic performance in the presence of bicarbonate radicals. The preparation method provided by the invention has the advantages of simple steps, convenience in operation, quick effect of treating chlorophenol, high product yield and low cost, and has good economic value and social benefit. The prepared monatomic catalyst has the advantages of being high in atom utilization rate, good in stability, excellent in catalytic effect and the like, and is expected to become a key technology for solving actual water environment organic pollution.

The invention discloses an industrial flue gas denitration filter bag and a preparation method thereof, and relates to the technical field of flue gas denitration. The industrial flue gas denitration filter bag comprises PTFE (Polytetrafluoroethylene) fibers, PPS (Polyphenylene Sulfide) fibers, PI (Polyimide) fibers and PTFE loaded fibers. Wherein the PTFE loaded fiber is a PTFE fiber layer loaded with a modified molecular sieve catalyst; the modified molecular sieve catalyst takes a molecular sieve coated with modified nanorods as a carrier, a vanadium-titanium composite oxide as an active catalytic component and a cerium-titanium composite oxide as a co-catalytic component; the modified nanorod is a molybdenum-tungsten composite oxide modified cerium dioxide nanorod. By introducing the modified molecular sieve catalyst prepared from cerium dioxide nanorods, lanthanum nitrate, molybdenum trioxide and other raw materials, the denitration capacity, the ammonia escape prevention capacity, the sulfur poisoning resistance, the hydrothermal stability and the working life are further improved, and an active temperature window is widened. Therefore, the method has a wider application prospect.

The invention discloses a high-temperature-resistant inorganic antibacterial ceramic glaze and a preparation process, and relates to the technical field of ceramic glaze preparation, the glaze is composed of a basic glaze and a zinc oxide-doped cerium dioxide inorganic antibacterial agent, and the basic glaze comprises feldspar, quartz, kaolin, calcite and talc. The preparation process comprises the following steps: mixing the raw materials, carrying out wet ball milling, adding the antibacterial agent and the dispergator, stirring at a high speed, sieving to remove iron, aging, glazing and sintering at a high temperature. In the process, an iron removal integrated unit integrating a two-stage vibration screening function and an automatic iron scraping function is adopted, and efficient and continuous iron removal operation is achieved. The obtained glaze can resist high-temperature sintering of 1150-1200 DEG C, the glaze surface is smooth and uniform, the glaze surface has lasting and efficient broad-spectrum antibacterial performance, glaze surface defects caused by iron impurities are effectively avoided, and the product yield and quality stability are improved.

The invention relates to a building exterior wall coating and a preparation method thereof, and belongs to the technical field of building coatings. The coating is composed of a composite inorganic-organic hybrid film forming base material, a nano composite flame-retardant filler, a bio-based thickener, a photoresponsive hydrophobic aid, a low-foam wetting dispersant and deionized water. Wherein the composite base material forms an interpenetrating network structure through compounding of sodium potassium silicate and phosphate modified polyacrylate emulsion, and has inorganic phase hardness and organic phase flexibility; the nano flame-retardant filler adopts an Mg-Al layered dihydroxy oxide and cerium dioxide core-shell structure, and zinc borate is loaded to realize multi-stage flame retardance. The preparation method comprises ultrasonic-assisted emulsion polymerization, electrostatic self-assembly filler compounding and gradient curing processes, and during construction, a layered spraying and ultraviolet activation combined technology is adopted. The super-hydrophobic self-cleaning flame-retardant coating has excellent flame retardance, super-hydrophobic self-cleaning performance and long-acting weather resistance.

The invention relates to cerium dioxide and a preparation method and application thereof, and the preparation method of the hexagonal cerium dioxide comprises the following steps: (1) carrying out first mixing on cerium salt, doped metal salt, a solvent, inorganic acid and organic acid to obtain a first mixture; the doped metal salt comprises praseodymium salt and / or neodymium salt; (2) under a hydrothermal condition, carrying out second mixing on the first mixture, ammonia water and ammonium salt to obtain a second mixture with the pH value of 3.5-6, and carrying out sol-gel reaction to obtain hexagonal cerium dioxide sol; and (3) carrying out post-treatment on the hexagonal cerium dioxide sol to obtain the hexagonal cerium dioxide. According to the preparation method of the hexagonal cerium dioxide, provided by the invention, a mixing process and a reaction process of cerium salt and specific raw materials are designed, so that the hexagonal cerium dioxide with regular particle shape, good size uniformity and high purity and crystallinity is obtained.

The application relates to the technical field of isotope separation, in particular to a SiO2@CeO2 core-shell material with silica supported cerium dioxide, a preparation method thereof and application of the SiO2@CeO2 core-shell material in Ge / Ga separation. 68 Efficient adsorption of Ge and 68 Effective elution of Ga; the SiO2@CeO2 core-shell material is used as a stationary phase, hydrochloric acid is used as a mobile phase, Ge / Ga is efficiently separated based on solid-phase extraction, and therefore the SiO2@CeO2 core-shell material can be used as 68 Ge- 68 Ga generator column packing.

This invention belongs to the field of glass technology and relates to a high-temperature resistant structural glass material, its preparation method, and its applications. The glass is composed of the following components by mass percentage: 60%-70% silicon dioxide, 5.5%-11% boric acid, 0.1%-5% aluminum hydroxide, 0%-3% potassium nitrate, 5.5%-13% potassium carbonate, 0%-12% sodium carbonate, 0.1%-4% calcium carbonate, 0%-2% calcium fluoride, 0%-1% lithium carbonate, 0%-2% basic magnesium carbonate, 0.1%-1% titanium dioxide, 0%-2% zirconium dioxide, and 0%-1% cerium dioxide; the total mass percentage of potassium nitrate, potassium carbonate, sodium carbonate, and lithium carbonate does not exceed 22%. This structural glass possesses a high softening temperature, a suitable coefficient of thermal expansion, high-temperature resistance, thermal shock resistance, and processing performance, making it suitable as a structural material for optoelectronic devices.

The invention discloses a rare earth element modified nickel-based nano-catalyst and a preparation method and application thereof.The rare earth element modified nickel-based nano-catalyst comprises a carrier and an active component loaded on the carrier, and the carrier is cerium dioxide and yttrium oxide co-doped three-dimensional ordered silicon dioxide nanoparticles; the active component is metal nickel. The application refers to the application of the catalyst in preparation of synthesis gas through carbon dioxide methane reforming. According to the invention, rare earth element doped and modified three-dimensional ordered silicon dioxide nanoparticles are used as a carrier, nickel metal is loaded on the nanoparticles, and the problem of carbon deposition can be effectively reduced by adjusting the interaction of alkaline sites and oxygen vacancies on the surface of the catalyst and the metal carrier. The method provided by the invention is helpful for realizing industrialization of a carbon dioxide methane catalytic reforming reaction, realizing a carbon emission reduction target and solving a green electricity energy storage problem.

This invention provides an anti-fouling and anti-wear polyurea coating, its preparation method, and its application method, belonging to the field of petroleum drilling and production technology. The coating includes a primer and a topcoat; the topcoat includes component A and component B. Component A includes: isophorone diisocyanate, polyethylene glycol, a dispersion of partially reduced graphene oxide modified with α-Al₂O₃ and YSZ nanopowders, and a mixture of α-Al₂O₃ micro / nano powders and YSZ micro / nano powders; component B includes: a chain extender, terminal amino polyethers, a diluent, a foaming agent, modified nano-molybdenum disulfide, and additives; the primer includes component C and component D. Component C includes: isophorone diisocyanate, polyethylene glycol, a dispersion of partially reduced graphene oxide modified with cerium dioxide nanopowders, a mixture of cerium dioxide micro / nano powders and yttrium oxide-stabilized zirconium oxide micro / nano powders; component D includes: a chain extender, terminal amino polyethers, a diluent, a foaming agent, modified nano-cerium dioxide, and additives.

This invention discloses a nickel or nickel oxide-supported cerium dioxide-doped lithium aluminum hydride hydrogen storage material, prepared by mechanical ball milling of a supported sample and lithium aluminum hydride. The supported sample is obtained by calcining a precipitate formed by mixing nickel nitrate as the nickel source and cerium nitrate as the cerium source with sodium hydroxide solution in a certain weight ratio and heating. The supported sample is either nickel-supported cerium dioxide or nickel oxide-supported cerium dioxide, named Ni@CeO2 and NiO@CeO2, respectively. The preparation method includes: step 1) preparation of nickel or nickel oxide-supported cerium dioxide; step 2) preparation of the nickel or nickel oxide-supported cerium dioxide-doped lithium aluminum hydride hydrogen storage material. For application in the field of hydrogen storage, the final system's hydrogen release temperature is reduced to 63.9 to 93.5℃, the hydrogen release amount reaches 6.7 to 7.1 wt%, and the hydrogen release rate is 88.94 to 96.03%. This invention achieves improved hydrogen storage material performance at lower temperatures.

The invention discloses high-strength chemically strengthened glass and a preparation method thereof, and relates to the technical field of glass. The chemically strengthened glass is prepared from the following raw materials: silicon dioxide, aluminum oxide, lithium oxide, sodium oxide, magnesium oxide, zirconium titanate, a cerium dioxide-yttrium oxide compound and a clarifying agent. The cerium dioxide-yttrium oxide compound is prepared from yttrium oxide and cerium dioxide; the clarifying agent is nano antimony trioxide. The preparation method of the high-strength chemically strengthened glass comprises the following steps: synthesis of zirconium titanate, preparation of a cerium dioxide-yttrium oxide compound, molding of a glass substrate, glass microcrystallization and preparation of the chemically strengthened glass. The chemically strengthened glass prepared by the invention is high in strength, and has excellent mechanical properties, impact resistance and acid and alkali resistance.

The invention relates to the technical field of electrode material preparation, in particular to a supported iridium-based catalyst with a carrier surface rich in hydroxyl and a preparation method and application thereof.The preparation method comprises the steps that cerous nitrate, sodium hydroxide and water are mixed and subjected to a hydrothermal reaction, and a cerium dioxide precursor is obtained; mixing the cerium dioxide precursor, a hydrogen peroxide solution, a sulfuric acid solution and water, and reacting to obtain an intermediate of which the surface is loaded with hydroxyl; and mixing the intermediate of which the surface is loaded with hydroxyl, iridium metal salt and an alcohol solvent, and carrying out reduction reaction to obtain the supported iridium-based catalyst of which the carrier surface is rich in hydroxyl. The preparation method provided by the invention is a universal preparation method of a nanoparticle electrode material, the process is simple, the operation is convenient, the cost is low, and the prepared catalyst has good electrochemical activity and high stability, can show relatively excellent electrochemical performance in an electrolyzed water OER reaction, and is suitable for industrial production. And a new research scheme is provided for industrial application of electrolyzed water.

The invention belongs to the technical field of metallurgy, and relates to a complex gold concentrate multi-element comprehensive recovery method which comprises the following steps: S1, complex gold concentrate and an auxiliary material I are subjected to bottom blowing smelting in a bottom blowing furnace in an oxygen-enriched air atmosphere to obtain matte, bottom slag and flue gas; s2, copper matte and an auxiliary material II are subjected to top-blowing blowing in a top-blowing furnace in the air atmosphere, and crude copper, flue gas and blowing slag are obtained; s3, refining the crude copper and carbonate in an air atmosphere, introducing methane gas after the reaction is finished, and reducing in an inert atmosphere to obtain a copper anode plate; wherein in the step S1, in the bottom blowing smelting process, a coking inhibitor composed of aluminum oxide, calcium oxide, sodium carbonate, ammonium molybdate, sodium borate and cerium dioxide is blown in an ascending flue of a bottom blowing furnace, the occurrence of the coking condition can be effectively reduced, and the complex gold concentrate recovery production start-up rate is increased.

The invention provides a functional filler, a preparation method thereof, a fireproof heat-insulating coating and application, and belongs to the technical field of coatings. The preparation method of the heat-insulating functional filler with the core-shell structure comprises the following steps: coating cerium dioxide and titanium dioxide in silicon dioxide by adopting a sol-gel method and a high-temperature sintering technology to form the core-shell structure; the core-shell structure is composed of a fully-coated core-shell structure and a semi-coated core-shell structure. The silicon dioxide has a hollow core-shell structure, and the cerium dioxide and the titanium dioxide are filled in a shell of the silicon dioxide core-shell structure. The fireproof heat-insulating coating is prepared by compounding the fireproof heat-insulating functional filler with the core-shell structure prepared by adopting a sol-gel method and a high-temperature sintering technology and the intumescent flame retardant, and the coating has excellent fireproof, heat-insulating and fireproof performance; the fireproof heat-insulating coating is sprayed on the surface of carbon steel to form a coating, when the thickness of the coating is 10 mm, acetylene flame ablation is resisted for 60 min, and the back temperature of the carbon steel is smaller than or equal to 280 DEG C.

The application provides a sound insulation rubber composite material and a preparation method and application thereof, and belongs to the technical field of rubber, and the preparation method comprises the following steps: butyl rubber and ethylene-propylene-diene rubber are added into a banbury mixer for plasticizing, then carbon black, a metal oxide compound, a modifying additive, a vulcanization activator and an antioxidant are added for mixing, vulcanization accelerators and vulcanization agents are further added for mixing, and then glue is discharged to obtain a rubber compound; the rubber compound is placed in an open mill for thin mixing and storage to obtain a mixed rubber; the mixed rubber is vulcanized on a flat vulcanizing machine to obtain the sound insulation rubber composite material; wherein the metal oxide compound is prepared by calcining and crushing cerium dioxide, titanium dioxide and silicon dioxide; and the modifying additive is prepared by using a functional polymer and modified hollow glass microbeads; the sound insulation rubber composite material has good sound insulation performance and durability, and the preparation process is simple.

This application relates to the field of rare earth smelting and separation technology, and discloses an ultrasonic-enhanced electrochemical coupling process for the complete separation of rare earth oxides, comprising the following steps: adding a polyphosphate complexing agent and a redox mediator to a cerium-rich rare earth aqueous solution as the anolyte, and pumping it into a dual-chamber membrane electrolytic cell separated by a cation exchange membrane for circulation. An electroacoustic phase-controlled synchronous system is activated to perform periodic reverse-phase pulse operations of turning on the ultrasonic current to decrease and turning off the ultrasonic current to increase. When the trivalent cerium conversion rate reaches a first threshold, the pH is dynamically adjusted and the current is reduced; when it reaches a second threshold, the process is stopped and the temperature is raised to mature the complex salt crystalline phase. The slurry is hot-pressed and filtered; the filter cake is dephosphorized and washed by alkaline solid-phase decomposition, and then calcined at a constant temperature to obtain high-purity cerium dioxide powder. This invention employs a dual-chamber electrolysis technology scheme using polyphosphate complexation combined with a perfluorosulfonic acid cation exchange membrane, achieving the technical effect of zero cathode penetration of rare earth materials.

This invention discloses a method for preparing a cerium dioxide catalyst for ultra-high temperature catalytic water-gas conversion reaction. The method involves first synthesizing cerium dioxide nanoparticles via a hydrothermal method, and then subjecting the nanoparticles to multi-step heat treatment in a gaseous environment to achieve surface modification, resulting in a cerium dioxide catalyst with a large number of exposed coordination unsaturated sites. The catalyst prepared by this method exhibits excellent catalytic performance for water-gas conversion reaction in the ultra-high temperature range above 600℃. Traditional industrial Fe-based catalysts deactivate above 600℃, while the cerium dioxide catalyst prepared by this invention maintains high performance at temperatures above 600℃ and is not easily deactivated. Furthermore, cerium dioxide catalysts are environmentally friendly materials with advantages such as low cost and minimal environmental pollution, showing broad application prospects in industrial water-gas conversion reaction for hydrogen production.

The embodiment of the invention provides a cerium oxide-gold nano catalytic material and a preparation method thereof, and the preparation method comprises the following steps: adding weak acid and strong alkali weak acid salt into deionized water, and uniformly stirring to obtain a buffer solution; adding a cerium source and a gold source into the buffer solution, and uniformly stirring to form a mixed solution; after the mixed solution is subjected to a photo-reduction reaction, the mixed solution is moved into a hydrothermal reaction kettle to be subjected to a hydrothermal reaction, and a cerium oxide-gold mixture is obtained; after the cerium oxide-gold mixture is cooled to the room temperature, precipitates are obtained through centrifugation; washing the precipitate with deionized water for multiple times, and drying to obtain a cerium oxide-gold nano catalytic material; wherein the cerium oxide-gold nano catalytic material comprises cerium dioxide and nano-gold loaded on the surface of the cerium dioxide, the cerium dioxide and the nano-gold are spherical or sphere-like, and the particle size of the cerium dioxide and the particle size of the nano-gold are both 3-15 nm. The preparation method disclosed by the embodiment of the invention is simple, and the prepared cerium oxide-gold nano catalytic material is relatively high in catalytic performance.

The invention relates to the technical field of copper alloys, in particular to a high-strength and high-conductivity C19400 copper-based composite material and a preparation method thereof. The method mainly comprises the steps that copper powder, iron powder, copper-phosphorus alloy, modified nano TiC and copper-cerium alloy powder are mixed and then subjected to high-energy ball milling, and the high-strength and high-conductivity C19400 copper-based composite material is obtained through vacuum drying, compression molding, pressure sintering and double-stage aging treatment, and the modified nano TiC is subjected to rare earth Ce precursor coating and weak oxidation heat treatment, so that the high-strength and high-conductivity C19400 copper-based composite material is obtained. And a cerium dioxide film layer is formed on the surface in situ, so that the dispersibility of nano TiC and the interface bonding between the nano TiC and a copper matrix can be improved. Through matching of the raw materials and the preparation steps, the effects of precipitation strengthening, dispersion strengthening and interface strengthening can be effectively coordinated, and the strength, the conductivity and the structure stability of the material are improved.

The invention discloses a steel slag-based flue gas desulfurization, denitrification and decarbonization material and method. According to the method, cerium (Ce) and manganese / zinc are co-doped with modified steel slag through a'defect engineering 'strategy, and the method comprises the following specific steps: dissolving cerium salt and manganese / zinc salt to prepare a solution A, mixing the solution A with a sodium hydroxide solution B, performing a hydrothermal reaction, and performing freeze drying and roasting to obtain a nanorod-shaped cerium dioxide material E; steel slag is ball-milled and sieved to obtain a material F; and loading the material E on the surface of the material F through a contact electrification effect to form a final material G. The specific surface area of the obtained material is 100-200 m < 2 > / g, and the cerium-based component is mainly rodlike cerium dioxide. Experiments show that the carbon sequestration performance, the desulfurization performance and the denitration performance of the modified steel slag are improved by 50%-100%, 150%-200% and 40%-80% respectively. The method treats waste with waste, is simple in process, and provides an efficient solution for reducing pollution and carbon in the iron and steel industry.

This invention discloses a composite-structured polymeric COH energetic material and its synthesis method, belonging to the field of energetic materials technology. It solves the problems of high pressure requirements and poor stability in the synthesis of polymeric COH materials in existing technologies. The composite-structured polymeric COH energetic material comprises polymeric CO and polymeric H / CO; wherein, polymeric CO coats polymeric H / CO to form a composite structure, and polymeric H / CO is formed by H-doped polymeric CO. The synthesis method involves adding a catalyst during the high-pressure reaction. The catalyst includes noble metals or noble metal-supported copper oxide or cerium dioxide materials, reducing the pressure required to synthesize the composite-structured polymeric COH energetic material. The synthesis method of this invention requires lower pressure, and the composite-structured polymeric COH energetic material of this invention exhibits good stability.