1406 results about "Cerium oxide" patented technology

The invention discloses an aerogel fire extinguishing agent for fire fighting, a fire extinguishing device and a releasing method.The aerogel fire extinguishing agent for fire fighting is prepared from, by mass, 8-12 parts of silicon dioxide aerogel powder, 40-45 parts of perfluorohexanone, 1.5-2 parts of zinc molybdate, 0.8-1.2 parts of nano cerium oxide, 2-3 parts of hyperbranched polysiloxane and 0.2-0.3 part of 18-crown-6 ether. Solid-phase silicon dioxide aerogel powder is matched with liquid-phase perfluorohexanone, zinc molybdate, nano cerium oxide, hyperbranched polysiloxane, 18-crown-6 ether and the like are compounded to serve as auxiliaries, efficient fire extinguishing can be conducted on precise electrical elements, residues are few, loss of instruments and equipment is small, and the fire extinguishing agent is suitable for being applied to the electrical field.

The invention discloses a high-weather-resistance bismuth vanadate coating and a preparation method thereof, and belongs to the technical field of inorganic pigment modification. The high-weather-resistance bismuth vanadate coating comprises bismuth vanadate matrix particles, and the surfaces of the bismuth vanadate matrix particles are sequentially coated with an amorphous aluminum oxide layer, a cerium oxide layer and a fluorinated silicon oxide layer. The amorphous aluminum oxide layer is formed in an atomic layer deposition mode; the cerium oxide layer is formed by hydrothermal treatment of a cerium source. The preparation technology has accurate and controllable technological parameters, is suitable for industrial production, can replace the traditional toxic pigment containing lead and cadmium, and meets the requirements of environmental regulations. The bismuth vanadate coating has excellent weather resistance and chemical stability, the service life of a product can be prolonged, the maintenance cost is reduced, and a reliable solution is provided for development of high-performance environment-friendly pigments.

The invention discloses a synergistic compound light stabilizer for an automobile coating and a preparation method of the synergistic compound light stabilizer, and belongs to the technical field of coating additives. The light stabilizer comprises the following components in percentage by mass: 30-50% of a hindered amine light stabilizer, 20-40% of an ultraviolet light absorber, 5-15% of surface modified nano cerium dioxide, 5-10% of a hyperbranched polyester anti-migration aid and the balance of a solvent, wherein the ultraviolet light absorber is a mixture of benzotriazole and triazine in a mass ratio of (1: 1)-(1: 3); the particle size of the nano cerium dioxide is 10-50nm, and the surface of the nano cerium dioxide is coated with a silane coupling agent; the preparation method comprises the following steps: modifying the surface of nano cerium dioxide, shearing and dispersing multiple components at a high speed, and adjusting and filtering a solvent; the weather resistance of the automobile coating is remarkably improved and the service life of the automobile coating is remarkably prolonged through the synergistic effect of a plurality of light stabilizing components and the combination of the photocatalytic degradation capability of the nano cerium dioxide and the anti-migration characteristic of the hyperbranched polyester.

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention relates to the field of anticorrosive paint, in particular to anticorrosive paint containing lanthanum cerium oxide and a preparation method of the anticorrosive paint. The invention relates to an anticorrosive coating containing lanthanum cerium oxide. The anticorrosive coating is prepared from the following raw materials: 28 to 45 parts of ultraviolet stable composite film forming matter, 5 to 10 parts of composite rare earth filler, 6 to 12 parts of supported synergistic antirust agent, 18 to 30 parts of mixed solvent, 0.8 to 2.5 parts of dispersing agent, 2.7 to 5.3 parts of functional additive and 0.5 to 1.2 parts of nano montmorillonite, the composite rare earth filler is lanthanum cerium oxide-hydroxyapatite composite powder with a core-shell structure, wherein lanthanum cerium oxide is used as a core, hydroxyapatite is used as a shell, and the thickness of the shell layer is 10-20 nm; the ultraviolet stable composite film forming substance comprises epoxy resin and ultraviolet grafting modified polyurethane in a weight ratio of 1: (0.6-2.2); the supported synergistic antirust agent is a mixture of mesoporous silica supported benzotriazole and zinc molybdate. And the obtained coating is high in adhesive force and long in service life.

The invention discloses preparation of a high-uniformity cerium oxide abrasive material and application of the high-uniformity cerium oxide abrasive material in a chemical mechanical polishing solution. According to a method, cerium nitrate or cerium oxalate is used as a cerium source, a cationic or nonionic surfactant is used as a structure-directing agent, and the high-uniformity cerium oxide abrasive material is prepared in a mixed solvent system formed by water and isopropanol or water and diethylene glycol according to a specific volume ratio. The preparation method comprises the following steps: regulating the particle size and the morphology structure through a solvothermal reaction, carrying out cleaning, drying and high-temperature calcination treatment on a reaction product to obtain sphere-like cerium oxide nano-particles with high particle size concentration ratio, moderate surface roughness and good dispersity, adding cerium oxide powder into deionized water, and carrying out ultrasonic dispersion to obtain the spherical cerium oxide nano-particles. And sequentially adding a dispersing agent and amino acid while stirring, uniformly stirring, fixing the volume, and adding a pH regulator to enable the solution to be weakly acidic, thereby obtaining the chemical mechanical polishing solution. The cerium oxide submicron powder which is different in surface appearance, particle size and distribution uniformity is prepared by adjusting the solvent ratio and other reaction conditions.

The invention relates to the technical field of PET optical films, and particularly discloses a high-light-transmittance blue-light-resistant PET optical film and a preparation method thereof, and the high-light-transmittance blue-light-resistant PET optical film is prepared from the following raw materials by weight: 70-85% of a polyethylene glycol terephthalate resin matrix; 3%-8% of a benzotriazole anti-blue light agent; 5%-12% of a silicon dioxide nano anti-reflection agent; 2%-6% of nano zinc oxide or nano cerium oxide; 1.5% to 4% of a polycarbodiimide cross-linking agent; 0.5%-3% of an anti-blocking agent; 0.4%-1.5% of an antioxidant; 0.4%-1.0% of an ultraviolet light absorber; the balance is a processing aid; the preparation method comprises the following steps: S1, pretreating the raw materials; s2, a mixing procedure; and S3, extruding and coating. The PET optical film provided by the invention has high optical properties of high light transmittance, blue light resistance and low haze, and has the advantages of high light transmittance and blue light blocking rate of the optical film and improvement of the application range of the optical film.

The invention provides a cerium oxide photo-thermal synergistic catalytic material loaded with a metal promoter as well as a preparation method and application of the cerium oxide photo-thermal synergistic catalytic material. The cerium oxide photo-thermal synergistic catalytic material loaded with the metal promoter comprises a cerium oxide nanocrystal and the metal promoter loaded on the surface of the cerium oxide nanocrystal, the exposed crystal face of the cerium oxide nanocrystal comprises a {111} crystal face, and the area of the {111} crystal face accounts for more than 50% of the total area of the outer surface of the crystal face; the mass fraction of the metal cocatalyst is 0.1-2wt% of the mass of the cerium oxide. The catalytic material provided by the invention takes cerium oxide with a {111} crystal face as an exposed special crystal face as a carrier, photons can be captured and charges can be separated more efficiently, and phonons further promote deep trap state charge release. Meanwhile, the metal additive is added and cooperates with cerium oxide with exposed special crystal faces for catalysis, so that the catalytic effect is remarkably improved, and efficient catalytic combustion of methane is achieved under the mild condition.

The invention relates to the technical field of biomedical materials, and discloses an electret electrostatic therapy membrane and a preparation process thereof.The electret electrostatic therapy membrane is prepared from, by mass, 15%-20% of fluorinated polyether ester, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material and the balance water. 1%-2% of carboxymethyl chitosan; 2-5% of nano cerium oxide particles with the particle size of 50-100 nm; 0.5-1.0% of graphene quantum dots, the particle size of which is 5-10 nm; 1%-2% of sodium hyaluronate; the components are prepared into a film through an electrostatic spinning method, electret performance is given to the film through a charge injection process, finally, the film body is attached to a flexible silica gel adhesion layer, and the flexible silica gel adhesion layer is externally coated with a peelable protective film so that the structural integrity can be kept before the flexible silica gel adhesion layer is used. The composite membrane body disclosed by the invention shows excellent adhesion, charge activation capability and thermal response performance in applications of electrostatic therapy, dielectric assisted stimulation and the like, and has good multi-scene adaptability and clinical application potential.

The invention provides a low-cost high-specific-surface-area cerium-aluminum composite oxide, a preparation method and application thereof, and relates to the technical field of catalysts, the preparation method comprises the following steps: step S1, adding 10-40% of cerium salt, 50-90% of aluminum salt and 0-10% of lanthanum source or zirconium source into deionized water, stirring and mixing, filtering, and washing to be neutral to obtain a cerium-containing solution; step S2, impregnating an alumina carrier in the cerium-containing solution prepared in the step S1, and standing to enable the cerium-containing solution to be impregnated on the alumina carrier, so as to obtain impregnated slurry; and S3, drying the dipping slurry, and then roasting in an inert atmosphere to obtain the cerium-aluminum composite oxide. The stable cerium-aluminum composite material is formed by doping one of lanthanum and zirconium with different masses into aluminum oxide or cerium oxide, the problem that the adsorption capacity of a traditional ammonia trapping method is limited is effectively solved, and the adsorption capacity of the material to ammonia is remarkably improved.

The invention relates to the technical field of polymer composite materials, and discloses a nano-ceramic-based composite insulating coating and a preparation method thereof, and the coating is prepared from a composite resin matrix, a composite functional ceramic filler, a double-reactivity organosilicon linker and an initiator. Wherein the composite resin matrix is composed of vinyl-terminated polydimethylsiloxane and a vinyl ether functionalized fluorocarbon copolymer, and a soft and rigid interpenetrating network structure is formed. The composite functional ceramic filler is prepared from needle-shaped silicon nitride, flaky hexagonal boron nitride, nano silicon dioxide, nano cerium oxide and nano barium titanate. According to the invention, a chemical bonding interface is constructed between the inorganic filler and the organic resin, and the synergistic effect of the composite matrix and the multifunctional filler is optimized, so that the coating has excellent adhesive force, flexibility and thermal shock resistance, obtains high volume resistivity and breakdown strength, and meets the insulation protection requirements under harsh working conditions.

Cerium oxide (CeO2) coated silica (SiO2) particles, optionally comprising the inorganic group-SO2X, and methods of making such particles. The addition of the cerium oxide (CeO2) coated silica (SiO2) particles to fluorinated polymers containing sulfonic acid functional groups increases their stability to free radical degradation when used in fuel cell applications or electrolytic applications.

The invention discloses an ultra-flexible stretchable dimming film and a preparation method thereof, and relates to the technical field of dimming films, and the ultra-flexible stretchable dimming film comprises an upper transparent electrode layer, a dimming function layer and a lower transparent electrode layer which are sequentially stacked from top to bottom; the preparation method comprises the following steps: 1) preparing a main matrix material / ultraviolet curing resin mixture; 2) assembling the dimming film; and 3) ultraviolet light curing. According to the invention, through surface phosphonic acid functionalization treatment, covalent bond anchoring of cerium oxide nanoparticles is realized on a thermoplastic polyurethane fiber network; by constructing a full-thermoplastic polyurethane material system, the breakthrough of interfacial compatibility between a fiber reinforced phase and a polymer matrix is realized, so that the film has high tensile strain capacity and excellent fatigue resistance on the premise of keeping high transparency.

The invention relates to a continuous production method of high-purity tetraethoxysilane, and belongs to the technical field of tetraethoxysilane preparation. The method comprises a raw material pretreatment stage and a purification and rectification stage: in the pretreatment stage, silicon tetrachloride and ethanol are subjected to an esterification reaction in a molar ratio of 1: (3-4) under the protection of nitrogen, the pH is adjusted to be neutral through triethylamine, and triethylamine hydrochloride is removed through reduced pressure distillation; then, a cerium oxide-molecular sieve composite adsorbent with the specific surface area larger than or equal to 800 m / g and the pore diameter of 2-5 nm is adopted for dehydration under the pressure of 0.8-1.2 MPa till the water content is smaller than or equal to 5 ppm, and volatile impurities are removed through high-purity nitrogen purging; in the purification stage, metal ions and Cl are synergistically removed through a titanate modified resin layer and a nano TiOtube layer, and then step-by-step separation is performed through a four-stage differential pressure rectifying tower. Through collaborative optimization of structural design of the composite adsorbent, construction of an organic-inorganic hybrid interface of the resin layer and pressure gradient rectification, 72-hour continuous production is achieved, the single-pass yield of the product is 92%, and the total amount of metal impurities is smaller than or equal to 5 ppb.

The invention discloses metallized silver paste for improving sintering dusting of a TOPCon battery, a preparation method and application, and belongs to the technical field of solar battery manufacturing, and the technical scheme is that the metallized silver paste comprises the following components in percentage by mass: 72-87% of a metal phase; 3-9% of a glass phase; 8-12% of an organic carrier; 0.1%-0.5% of a polyimide precursor; 0.1 to 0.5 percent of cerium oxide; wherein the polyimide precursor forms a cross-linked network at a high temperature, the cerium oxide is used as a passivation layer protective agent, and lithium borosilicate glass is also added into the glass phase; according to the metalized silver paste for improving the sintering dusting of the TOPCon cell, the preparation method and the application, the dusting rate is reduced by improving and optimizing materials and process parameters, and compared with a traditional process, the efficiency, the photoelectric conversion efficiency and the yield of the solar cell are further improved.

The invention relates to the technical field of catalyst preparation, and discloses a preparation method and application of a ruthenium / cerium oxide composite nanofiber catalyst, and the preparation method comprises the following steps: (1) adding cerium salt and P123 into a mixed solution of DMF (Dimethyl Formamide) and an alcohol solvent according to a molar ratio of 1: (0.1-0.4), stirring and mixing, and carrying out hydrothermal reaction at 160-180 DEG C for 4-12 hours to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain a cerium fiber precursor; (3) pre-oxidizing the cerium fiber precursor, and then carrying out aerobic roasting to obtain a cerium oxide nanofiber carrier; and (4) dipping the cerium oxide nanofiber carrier in a ruthenium salt solution, drying, and performing hydrogen reduction to obtain the catalyst. According to the invention, the ruthenium / cerium oxide composite nanofiber catalyst with a unique cavity-containing nanofiber form is prepared by adopting an electrostatic spinning technology, and the ruthenium / cerium oxide composite nanofiber catalyst has good catalytic selectivity and stability in an ammonia decomposition reaction.

The invention relates to the technical field of optical films, and discloses a PET-based composite optical film and a preparation method thereof.The optical film is prepared from 100 parts of PET master batch, 5-10 parts of anti-blue-light nanofiller and 1-3 parts of interfacial compatibilizer through melt extrusion, asynchronous two-way stretching, online anti-fingerprint coating liquid coating and cooling and rolling; the blue-light-resistant nano filler is a core-shell structure filler prepared by taking KH570 silanized nano cerium oxide as a core, polymerizing by grafting glycidyl methacrylate to form a shell layer, and then reacting with 1H-benzotriazole-1-methanol. The anti-fingerprint coating liquid is prepared from perfluoropolyether modified siloxane acrylate and nano silicon dioxide sol. Through core-shell filler design and functional coating online coating, the technical problems that inorganic nanoparticles are easy to agglomerate and organic small molecule auxiliary agents are easy to migrate are synergistically solved, and the obtained optical film has excellent properties of high light transmittance, low haze, efficient blue light resistance and lasting fingerprint resistance and is good in durability.

The invention belongs to the technical field of preparation and application of nano materials, and relates to a preparation method and application of amino-functionalized cerium oxide nano enzyme, and the preparation method comprises the following steps: adding 3-aminophenylboronic acid into a cerous nitrate hexahydrate aqueous solution to obtain a mixed solution; dropwise adding a sodium hydroxide aqueous solution into the mixed solution, carrying out hydrothermal reaction, cooling after the reaction is finished, centrifuging, washing and drying to obtain milk white powder, namely the amino-functionalized cerium oxide nano-enzyme. The boron element is introduced in the preparation of the cerium oxide nano-enzyme, and the amino-functionalized cerium oxide nano-enzyme is prepared by adopting a simple one-step hydrothermal synthesis method, so that the nano-enzyme has good phosphatase-like activity, has high selectivity and sensitivity to LPS, and is short in detection time, high in sensitivity, low in detection limit, simple in preparation process and high in preparation efficiency; the product is good in quality, high in stability, environment-friendly and extremely wide in market prospect.

The invention discloses a full-spectrum protective anti-fingerprint resin lens and a preparation method thereof. The full-spectrum protective anti-fingerprint resin lens comprises a functionalized resin base material and a gradient composite functional coating. The base material takes polyurethane acrylate as a matrix, and nano cerium oxide, nano barium titanate and nano tungsten oxide functional particles are uniformly dispersed through in-situ polymerization, so that base material intrinsic protection on ultraviolet rays, harmful blue light and near-infrared light is realized. The gradient coating comprises an adhesion promoting layer, a full-spectrum repairing and protecting layer and an anti-fingerprint layer from inside to outside, a stable composite system is formed through chemical bonding, protection is further reinforced, and the lens is endowed with super-hydrophobic and oleophobic anti-fingerprint characteristics. Through the integrated design of base material modification and coating compounding, the technical problems that an existing lens is single in protection wave band, not lasting in performance and prone to being stained with fingerprints are solved, and meanwhile the lens has high light transmittance, low reflection, excellent wear resistance and impact resistance and excellent comprehensive performance.

The present application belongs to the field of diamond preparation, and discloses a high-quality single-crystal diamond preparation method for removing polycrystal defects. Through screen printing and plasma-assisted etching, the (100) surface around the black point-shaped polycrystal is directionally etched by cerium oxide, and a square groove is etched. Then, the slurry of iron oxide or nickel oxide is printed by screen printing, the black point-shaped polycrystal is covered with the slurry, and the black point-shaped polycrystal is removed by plasma-assisted etching. Then, the etched groove is filled by a horizontal growth process, so that the growth defects can be removed, and high-quality single-crystal diamond can be obtained. The present application can greatly reduce the waste rate of single-crystal diamond products and improve the utilization rate of single-crystal diamond. The present application is beneficial to saving production cost and improving efficiency.

The invention discloses porous chlorine dioxide slow-release preservative paper and a preparation method thereof.The porous chlorine dioxide slow-release preservative paper comprises a paper base, a porous carrier is fixed to the paper base through oxidized starch glue, and sodium chlorite, an activating agent and a stabilizing agent are loaded on the porous carrier; the porous carrier is one of aluminum oxide, titanium oxide, cobalt oxide, zinc oxide, copper oxide, iron oxide, cerium oxide, zirconium oxide, nickel oxide, manganese oxide, praseodymium oxide and lanthanum oxide with a porous structure. The slow release of chlorine dioxide can be stably and effectively realized, the release period of chlorine dioxide is prolonged, and long-acting stable sterilization and disinfection effects are realized.

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 preformed methane reforming catalyst and a preparation method thereof. The catalyst comprises a nickel-active alumina first functional component, a cerium oxide nanocluster second functional component and an alumina inert phase. The preparation method comprises preforming an inert phase pretreatment, hydrothermal treatment, calcination and reduction. The preformed inert phase after pretreatment is used as a carrier, which greatly improves the catalyst strength, pertinently weakens the metal-carrier interaction, avoids bed layer temperature drop and carbon deposition caused by local high strength reaction, and improves the operation stability. The first functional component with a layered structure and the second functional component rich in oxygen vacancies further improve the catalyst activity and stability, and the performance indicators are overall superior to those of the existing catalyst products. The preparation method is simple and easy to implement, has no special requirements on equipment, and is conducive to the popularization and application in the fields of methane steam reforming and methane dry reforming.

The invention relates to the technical field of binders, in particular to a lithium ion battery negative electrode binder and a preparation method thereof, the lithium ion battery negative electrode binder comprises the following raw materials by weight: 15-45 parts of a temperature resistant material, 10-20 parts of a toughening material, 6-10 parts of an anticorrosive filler, 50-150 parts of bisphenol epoxy resin and 1-5 parts of a reducing agent. According to the preparation method, side reactions existing in the preparation process of the lithium ion negative electrode battery are inhibited, the electrochemical stability, interface compatibility and processing performance of the lithium ion battery are improved, the binding force of the negative electrode binding interface of the lithium ion battery can be enhanced, a rigid-flexible interpenetrating network is formed, the fracture toughness of the binding agent is improved, and the service life of the binding agent is prolonged. Through the synergistic effect of fluorination modification and a rigid framework, the three-in-one performance of high adhesion, electrolyte resistance and high temperature resistance is achieved, cerium oxide nanoparticles can be subjected to oxidation reduction, free radicals are eliminated, electrolyte oxygenolysis is inhibited, and the problems that an adhesive is weak in adhesion force and poor in electrolyte corrosion resistance stability are solved.

The invention belongs to the technical field of air power supplies, and relates to modification treatment of an oxide, in particular to a cerium oxide doped transition metal oxide and a preparation method thereof, an air cathode and an air power supply. The preparation method comprises the following steps: dissolving cerium salt, cobalt salt and manganese salt in water, uniformly mixing to obtain a mixed solution, adjusting the pH value of the mixed solution to 9-11, and carrying out a sedimentation reaction to obtain a sediment; and drying the precipitate, and calcining in an air atmosphere at 300 + / -10 DEG C for 2-4 hours to obtain the cerium oxide doped transition metal oxide. The cerium oxide doped transition metal oxide is cerium doped cobalt manganese oxide with a spinel structure, and the doping amount of cerium is 20 + / -1wt%. The cerium oxide doped transition metal oxide provided by the invention is applied to an air cathode as a catalyst, and has good stability and high catalytic activity. The performance of an air power supply containing the oxide is remarkably improved. The method for preparing the oxide provided by the invention is simple and easy to operate, and is suitable for large-scale production.

The invention belongs to the technical field of catalyst development, and relates to a cerium oxide-loaded non-noble metal catalyst for a carbon dioxide methanation reaction and a preparation method of the cerium oxide-loaded non-noble metal catalyst. The method comprises the following steps: firstly, obtaining a cerium oxide carrier through a hydrothermal reaction, secondly, impregnating non-noble metal nitrate serving as a precursor on the cerium oxide carrier through an impregnation method, and carrying out ultrasonic treatment, drying, calcining and other steps to obtain the cerium oxide supported non-noble metal catalyst. The prepared catalyst is low in cost and has excellent carbon dioxide methanation catalytic activity. By controlling the loading capacity and the loading type of the non-noble metal, a multi-site synergistic effect is realized, more active sites are exposed, and finally, the catalytic performance of the cerium oxide loaded non-noble metal catalyst for catalyzing methanation of carbon dioxide at low temperature is improved.

The invention belongs to the technical field of tungsten alloy, and particularly discloses a tungsten alloy electrode material and a preparation method thereof.The tungsten alloy electrode material comprises, by weight, 0.1%-0.2% of lanthanum boride, 0.2%-0.5% of zirconium oxide, 0.2%-0.6% of boron carbide, 0.4%-0.8% of cerium oxide, 0.5%-1.2% of tantalum carbide, 1.4%-1.8% of modified carbon nanotubes and the balance tungsten powder. The lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes are added into the tungsten powder, under the combined action of the lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes, the tensile strength and the electrical conductivity are effectively improved, and the high-temperature stability tungsten powder has excellent high-temperature stability and wide application prospects.

The invention provides a high-activity catalyst for producing hydrogen by electrolyzing water as well as a preparation method and application of the high-activity catalyst. Specifically, the catalyst for producing hydrogen by electrolyzing water comprises: a carbon sintered body carrier; the active components are loaded on the surface and inside the carbon sintered body carrier, the active components comprise nickel molybdenum nitride (NiMoN), cobalt phosphide (CoP) and cerium oxide, and the catalyst has a porous structure. The catalyst is low in cost, high in activity and good in stability, the cost of hydrogen production through water electrolysis can be effectively reduced, and the hydrogen production efficiency is improved.

The application belongs to the technical field of plastics, and particularly relates to a degradable antibacterial plastic packaging bag and a preparation method thereof. The degradable antibacterial plastic packaging bag comprises the following raw materials in parts by weight: polycaprolactone 70-90 parts; polybutylene adipate terephthalate 20-40 parts; Cr and Cu co-modified ZIF-8 5-20 parts; and cerium oxide tannic acid material 2-6 parts. The Cr and Cu co-modified ZIF-8 synergistically improves the antibacterial performance of the packaging bag, and the addition of the cerium oxide tannic acid material further improves the antibacterial performance of the packaging bag. Moreover, the degradable antibacterial plastic packaging bag prepared by the application has excellent mechanical properties.

The invention discloses a graphene aerogel modified elastic graphite material and a preparation method thereof, and the graphene aerogel modified elastic graphite material comprises the following components by mass: 50-80 parts of crystalline flake graphite; 8 to 15 parts of graphene aerogel; 3 to 8 parts of aminated modified boron-doped carbon nanotubes; 2 to 6 parts of hydroxyapatite-cerium oxide composite nano particles; 1 to 4 parts of a polyimide-montmorillonite nano composite material; 0.5 to 3 parts of titanate coupling agent modified nano silicon dioxide; 1-3 parts of a dispersant; 2-5 parts of a binder; the amination modified boron-doped carbon nanotubes can enhance the electrical conductivity and interface bonding force of the material, the hydroxyapatite-cerium oxide composite nanoparticles improve the high-temperature stability and mechanical toughness of the material, and the polyimide-montmorillonite nanocomposite improves the corrosion resistance and resilience durability of the material. And the titanate coupling agent modified nano silicon dioxide further optimizes the dispersion uniformity of all the components, and the comprehensive performance of the material is remarkably improved.