347 results about "Cerium nitrate" patented technology

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 belongs to the technical field of denitration catalyst preparation, and discloses a meerscham-TiO2 composite carrier loaded manganese cerium medium and low temperature denitration catalyst and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing meerschaum and nitric acid, then heating and stirring for reaction, then carrying out suction filtration and washing, and drying to obtain a meerschaum-TiO2 composite carrier loaded manganese cerium medium and low temperature denitration catalyst; after the treated sepiolite is drained, drying and screening are conducted, and nitric acid acidified sepiolite is obtained; and (2) mixing the meerschaum acidified by nitric acid and TiO2, then adding the manganese source precursor solution into the acidified meerscham-TiO2, then dipping and stirring, dropwise adding a potassium permanganate solution into the solution, then adding a cerium nitrate solution, stirring and then carrying out suction filtration, drying, grinding and screening the obtained filter cake, and then calcining to obtain the catalyst. According to the invention, the acidified sepiolite and TiO2 are compounded, so that complementary advantages of the two carrier materials are realized, and the obtained catalyst not only has good denitration efficiency, but also can significantly reduce the production cost.

The invention relates to the technical field of wastewater treatment, in particular to a multistage composite adsorbent for treating petrochemical wastewater and a preparation method thereof.The preparation method comprises the steps that S1, plant straw powder and 3-aminopropyltriethoxysilane are subjected to a constant-temperature reaction, and aminated plant straw is obtained; s2, carrying out hydrothermal reaction on the aminated plant straw and a cerium nitrate solution to obtain functionalized plant straw; s3, the halloysite nanotubes, glutaraldehyde and the functionalized plant straw are stirred for a reaction, high-temperature carbonization is conducted after the reaction is completed, and composite biochar is obtained; s4, carrying out a reaction on the composite biochar and an amino silane coupling agent to obtain aminated composite biochar; s5, calixarene, toluene diisocynate and the aminated composite biochar are subjected to a reaction, and the multi-stage composite adsorbent is obtained. According to the technical scheme, the comprehensive adsorption capacity and removal efficiency of various organic pollutants in the petrochemical wastewater are improved, and the defect that a traditional adsorbent is poor in selectivity is overcome.

The invention discloses a cerium-modified manganese-based NH3-SCR (Selective Catalytic Reduction) denitration catalyst as well as a preparation method and application thereof. The catalyst is obtained by uniformly mixing and stirring manganous nitrate, cerous nitrate, polyvinylpyrrolidone, citric acid and deionized water, stirring and evaporating to a gel state, drying to form a precursor, and roasting the precursor in an air atmosphere. Ce is used for modifying MnOx, polyvinylpyrrolidone and citric acid are used as a surfactant and a complexing agent in the preparation process of the catalyst, the interaction between Ce and Mn is enhanced, the phase of the catalyst is adjusted, and under the conditions of high NOx concentration (1000 ppm) and high space velocity (GHSV = 120,000 mL h <-1 > g <-1 >), the catalyst can be used for preparing the catalyst, and the catalyst can be used for preparing the catalyst. The catalyst has excellent low-temperature catalytic activity, a wide working temperature window and good reaction stability, and has good water resistance and sulfur dioxide poisoning resistance.

The invention belongs to the technical field of chemical analysis and detection, and relates to a method for rapidly detecting sodium ions in cigarette paper by nano-enzyme laccase. According to the method, 2-aminoterephthalic acid, copper nitrate and cerous nitrate are taken as precursors, polyvinylpyrrolidone is taken as a stabilizer, and a solvothermal method is adopted to synthesize the copper-cerium-containing MOF-based nano-enzyme with laccase-like activity, namely Cu / Ce-BDC-NH2 nano-enzyme; cu / Ce-BDC-NH2 nano-enzyme oxidizes 2, 4-dichlorophenol and 4-aminoantipyrine to obtain a red product, the potassium pyroantimonate ligand is adsorbed on the surface of Cu / Ce-BDC-NH2 to inhibit catalytic action, so that laccase-like activity is reduced, Na < + > is introduced to react with potassium pyroantimonate to generate a stable complex, the activity of Cu / Ce-BDC-NH2 laccase is recovered, and the red color of a solution is deepened. The invention establishes a novel colorimetric rapid detection method for sodium ions.

The invention provides a composite lithium ion battery diaphragm. The composite lithium ion battery diaphragm is composed of rare earth doped graphene and polyimide. According to the invention, the problem that the existing composite lithium ion battery diaphragm is insufficient in conductivity, dendritic crystal inhibition, stability in long-term use under extreme conditions and the like is solved, and the preparation of the lithium ion battery diaphragm capable of keeping high ionic conductivity, mechanical strength, thermal stability and dendritic crystal inhibition is realized. Experiments prove that the ionic conductivity of the cerium nitrate doped graphene-polyimide composite lithium ion battery diaphragm obtained by the invention is 0.5-1.8 mS / cm; the mechanical strength is 50 to 79 MPa; the thermal shrinkage rate in thermal stability is less than or equal to 5%-12% (150 DEG C / 1h); and the cycle life of a dendritic crystal inhibition test is more than 80-200 times (1mA / cm).

The invention discloses a high-sulfur-tolerance SCR honeycomb denitration catalyst and a preparation method thereof, and belongs to the technical field of industrial catalysts.The preparation method comprises the steps that S1, anatase type TiO2 and NH4HCO3 are mixed for pulping, pre-drying and calcination are conducted after extrusion forming, and a green body is formed; s2, carrying out nitric acid treatment on the green body, dipping the green body in a mixed solution of copper nitrate hydrate and cerium nitrate hydrate, and carrying out vacuum dipping, microwave drying and two-stage calcination to obtain a desulfurization carrier; s3, depositing an ammonium metatungstate precursor on the surface of the desulfurization carrier through CVD, and calcining to form a WO3 transition layer; and S4, dipping the transition layer in an acid solution containing NH4VO3 and ammonium metatungstate, and calcining after ultrasonic treatment to obtain a finished product. According to the method, the pore structure of the carrier is optimized through chambering treatment, and the stability and denitration efficiency of the catalyst in high-sulfur flue gas are remarkably improved by combining a multistage sulfur-resistant mechanism that the desulfurization layer preferentially captures SO2, the WO3 transition layer obstructs sulfur penetration and the denitration layer is protected by active sites.

The invention discloses a method for preparing a carbon monoxide normal-temperature oxidation catalyst based on electrolytic manganese residues and landfill leachate. The method comprises the following steps: soaking and purifying the electrolytic manganese residues with deionized water to obtain preliminarily purified electrolytic manganese residues; mixing aryl alcohol dehydrogenase, the preliminarily purified electrolytic manganese residues and the landfill leachate, and standing to obtain enzymolysis electrolytic manganese residue slurry; mixing fly ash, red mud and the enzymolysis electrolytic manganese slag slurry, uniformly stirring, drying and grinding to obtain a multi-component composite raw material; placing the multi-component composite raw material in low-temperature plasma equipment for irradiation to obtain a plasma activated composite material; and carrying out hydrothermal reaction on the plasma activated composite material to obtain a hydrothermal structure composite material, dipping the hydrothermal structure composite material in a solution containing cerium nitrate, drying, and roasting to obtain the carbon monoxide normal-temperature oxidation catalyst. The carbon monoxide normal-temperature oxidation catalyst with high activity and high moisture resistance is prepared by utilizing industrial wastes and landfill leachate enzymolysis derivative liquid.

The invention relates to an organic wave-transparent composite material for improving high-temperature dielectric loss stability based on high-temperature oxygen release and carbon removal and a preparation method thereof.The organic wave-transparent composite material is prepared by selecting polymethyl ethoxy siloxane (PMES) as a precursor, trifunctional rigid silane as a cross-linking agent, polymethyl ethoxy siloxane (PMES), trifunctional rigid silane, a solvent ethanol and a catalyst through a hydrothermal method. The preparation method comprises the following steps: preparing an organic silicon resin solution by mixing, and adding ceric nitrate into the resin solution; an organic silicon resin solution is compounded with a quartz fiber preform through an RTM (Resin Transfer Molding) process, and the organic wave-transparent composite material with good dielectric properties is obtained through dipping, curing and drying. Compared with the prior art, the composite material has the function of stable dielectric property at high temperature, and can be applied to missile radar radome materials.

The invention discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oil field fracturing fluids. When the high-temperature-resistant and salt-resistant fracturing fluid is prepared, sodium 3-chloro-2-hydroxypropane sulfonate, N, N-dimethylacrylamide and ethylene glycol react to prepare a quaternized solid product, and then the quaternized solid product reacts with 1-bromooctadecane to prepare an amphoteric hydrophobic monomer; guar gum powder reacts with 3-(1-naphthyloxy)-1, 2-epoxypropane to prepare naphthyloxy functionalized guar gum, and then the naphthyloxy functionalized guar gum, acrylamide and an amphoteric hydrophobic monomer are subjected to initiated polymerization through ceric ammonium nitrate to prepare modified guar gum; enabling zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethanediamine and glycerol to react to prepare an organic zirconium cross-linking agent; and finally, mixing the modified guar gum, an organic zirconium cross-linking agent, sodium thiosulfate, sodium bromate, a surfactant and water to prepare the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the invention has excellent high-temperature resistance and salt resistance.

The invention provides an anti-ionizing radiation fiber with high filling amount, high strength and high elasticity and a preparation method and application thereof, and belongs to the field of functional fiber materials.The preparation method comprises the steps that rare earth nitrate and citric acid are dissolved in an acidic alcohol aqueous solution, heated and stirred, the pH value is adjusted, sol is obtained, the sol is subjected to secondary heating treatment to obtain gel, and the gel is dried to obtain the high-filling-amount high-strength high-elasticity anti-ionizing radiation fiber. Aging, drying, grinding and calcining the gel to obtain rare earth composite powder; wherein the rare earth nitrate is a mixture of gadolinium nitrate, dysprosium nitrate and cerium nitrate; adding polyurethane into a mixed solution of DMF and xylene, stirring, adding the rare earth composite powder, stirring, and defoaming to obtain a spinning solution; preparing nascent fibers from the spinning solution through wet spinning; and drawing, washing and drying to obtain the anti-ionizing radiation fiber. The anti-ionizing radiation fiber prepared by the invention has excellent shielding property, mechanical property and air permeability.

The invention relates to the technical field of anti-corrosion treatment, and provides anti-corrosion molding powder and a radiator anti-corrosion treatment technology.The anti-corrosion molding powder is prepared by taking polyethylene glycol terephthalate as a matrix and cooperating with a TGIC curing agent, phosphoric acid activated bamboo charcoal nanofibers, graphene modified zinc oxide, a lanthanum nitrate and cerous nitrate compound, a silane coupling agent and a functional additive; a composite resin system with a compact nano-structure is prepared through high-speed ball milling pre-activation and a twin-screw gradient extrusion process. The treatment process of the radiator comprises the steps of forming the ceramic substrate layer through micro-arc oxidation, performing dynamic temperature control impregnation with acrylic acid water-based paint, spraying anti-corrosion molding powder, performing microwave infrared gradient curing, and constructing a metal substrate-ceramic layer-organic coating multi-stage protection system. The permeability resistance of the coating is remarkably improved, a continuous and compact composite protection structure is formed, the problems of interface stripping, medium permeation and poor environmental adaptability of a traditional coating are solved, and the coating is suitable for the long-acting anti-corrosion requirement of the radiator under the high-corrosion working condition.

The invention relates to the technical field of nano titanium oxide preparation processes, and discloses a nano titanium oxide preparation method which comprises the following steps: dissolving cerium nitrate in deionized water to obtain a solution A; dissolving tetrabutyl titanate in absolute ethyl alcohol, adding the solution A, and uniformly stirring to obtain a solution B; dissolving glycerol and hydroxybenzophenone in deionized water, and uniformly stirring to obtain a solution C; slowly dropwise adding the solution B into the solution C, adding citric acid at the same time, and violently stirring to form a mixed solution; adjusting the pH value of the mixed solution to 9.0-10.0 to form a suspension; and carrying out reaction on the suspension at 160-200 DEG C for 6-10 hours. According to the nano titanium oxide prepared by the preparation method disclosed by the invention, the skin feeling of the nano titanium oxide can be remarkably improved, the problems of dryness, thickness, whitening and the like are reduced, and the use satisfaction of consumers is improved.

The invention relates to the technical field of water treatment, in particular to a rare earth composite antibacterial scale inhibitor and a preparation method thereof.The preparation method comprises the steps that glycidyl methacrylate, vinylphosphonic acid, N-vinylthiourea and acrylic acid are mixed, a mixed solvent of deionized water and ethyl alcohol is added, nitrogen is introduced after the mixture is stirred and dissolved, azodiisobutyronitrile is added, the mixture is stirred at the constant temperature for a reaction, and the rare earth composite antibacterial scale inhibitor is obtained; the preparation method comprises the following steps: preparing a quadripolymer solution, adding trimethylamine hydrochloride into the quadripolymer solution, carrying out heating and stirring reaction, adjusting the pH value to be neutral to obtain a cationized copolymer solution, dropwise adding the cationized copolymer solution into a cerous nitrate solution, carrying out stirring reaction at room temperature, carrying out centrifugal washing, and carrying out freeze drying to obtain the rare earth composite antibacterial scale inhibitor. The prepared antibacterial scale inhibitor is remarkable in effect, metal ions can be combined in scale inhibition, growth of scale crystals is prevented, the rare earth ions and the copolymer are synergistically antibacterial, and the antibacterial scale inhibitor is durable, stable, good in dispersity and capable of adapting to complex environments.

The invention provides an aluminum-doped NiCoCe catalyst, a preparation method thereof and application of the aluminum-doped NiCoCe catalyst in low-temperature CO2 hydrogenation methane preparation reaction, the preparation method comprises the following steps: (1) dissolving nickel nitrate, cobalt nitrate, cerium nitrate, aluminum nitrate and an alkaline precipitator in deionized water, and fully stirring the solution at room temperature to obtain a solution A; (2) putting the solution A into a reaction kettle, and crystallizing the mother liquid at a constant temperature for a certain time to obtain a solid-liquid mixture B; (3) centrifuging and washing the solid-liquid mixture B in the step (2) to obtain a precipitate C; (4) drying the precipitate C in the step (3) to obtain a precursor D; and (5) reducing and passivating the precursor D in the step (4) to obtain the catalyst. The catalyst prepared by the invention effectively solves the problem of low CO2 conversion rate in low-temperature CO2 methanation reaction, lattice distortion is promoted by introducing the Al element, the migration ability of lattice oxygen is increased, and the formation of a large number of oxygen vacancies is beneficial to improving the oxidation-reduction property of the catalyst.

The invention discloses a plant-based deodorant and a preparation method thereof, and relates to the technical field of high polymer materials. When the plant-based deodorant is prepared, beta-cyclodextrin reacts with paratoluensulfonyl chloride and then reacts with ethylenediamine, and amino modified cyclodextrin is prepared; the plant-based extract is subjected to inclusion with amino modified cyclodextrin, and a cyclodextrin inclusion compound is prepared; the preparation method comprises the following steps: reacting hydroxyethyl cellulose with methacrylic anhydride to prepare double-bond modified cellulose; carrying out hydrothermal reaction on titanium sulfate, the carboxylated multi-walled carbon nanotube, ammonium fluoride and cerous nitrate to prepare a co-doped titanium dioxide / carbon nanotube; coating the co-doped titanium dioxide / carbon nano-tubes with oleic acid to prepare modified nano-particles; and reacting the double-bond modified cellulose with the cyclodextrin inclusion compound, and then copolymerizing with the modified nanoparticles and the comonomer to obtain the plant-based deodorant. The prepared plant-based deodorant has the advantages of good deodorization effect, slow release and photocatalytic degradation.

The invention relates to the field of catalyst preparation, in particular to a nickel-based methane dry reforming catalyst and a preparation method thereof, and a preparation method of synthesis gas. The preparation method of the catalyst provided by the invention comprises the following steps: respectively mixing cerium nitrate and a silicon dioxide carrier with water to obtain two mixed solutions, then mixing the two mixed solutions, adding ammonia water to adjust the pH value, then adding an ammonia water solution of nickel nitrate, heating to volatilize the ammonia water, and further separating the catalyst through rotary evaporation. The silicon dioxide supported nickel cerium catalyst prepared by the method has the advantages that the specific surface area of the silicon dioxide is high, the Ni nano-particles are highly dispersed and uniformly distributed on the silicon dioxide carrier, the average particle size of the Ni nano-particles is less than 5nm, and the catalyst shows high catalytic activity and stable catalytic performance when being used in the methane dry reforming reaction; in addition, the preparation method disclosed by the invention is simple, and is easy for industrial production.

The invention relates to a preparation method for easily preparing a cerium dioxide nanorod with a controllable size, in particular to a preparation method for regulating and controlling the size of the cerium dioxide nanorod by adding an organic solvent which is mutually soluble with water. The method comprises the following steps: firstly, mixing an organic solvent which is mutually soluble with water with deionized water in a proper proportion to obtain a mixed solution; a proper amount of cerium nitrate hexahydrate is weighed and dissolved in the mixed solution, and a cerium nitrate solution A is obtained; a proper amount of potassium hydroxide is weighed and dissolved in the mixed solution, and a potassium hydroxide solution B is obtained; and adding the solution B into the solution A, uniformly mixing, transferring into a reaction kettle, and carrying out hydrothermal reaction at set temperature for set time. And after the reaction is finished, centrifugally washing with deionized water and ethanol, and drying to finally obtain the cerium dioxide nanorod with the controllable size. The size of the cerium dioxide nanorod can be effectively adjusted by adjusting the variety and the mixing ratio of the organic solvent which is mutually soluble with water. The method is easy and convenient to operate, mild in reaction condition, high in controllability and suitable for large-scale production. The prepared cerium dioxide nanorod has a wide application prospect in the fields of catalysis, optics and electronics.

The invention discloses a flue gas distributed denitration process, and belongs to the technical field of fuel gas distributed energy supply. Ammonia gas is added into flue gas at an inlet of a bag-type dust collector and reacts with nitrogen oxide in the flue gas at an active site of a low-temperature denitration catalyst, so that efficient denitration can be realized at a low temperature, and nontoxic and harmless nitrogen and water are generated; reheating denitration is not needed; according to the low-temperature denitration catalyst, cerium nitrate and manganese nitrate are impregnated into mesoporous pores of mesoporous titanium dioxide submicrospheres through vacuum impregnation, glucose serves as a carbon source, p-phenylenediamine serves as a nitrogen source, and manganese cerium / nitrogen-doped titanium dioxide microspheres are obtained through hydrothermal carbonization. And then MOF-tungsten is dispersed in silicon dioxide sol to coat the manganese cerium / nitrogen-doped titanium dioxide microspheres, so that the manganese cerium / nitrogen-doped titanium dioxide microspheres have good compressive strength, wear resistance and denitration efficiency, have excellent ammonium bisulfate decomposition capability and are not easy to block.

The invention provides a synergistic flame retardant-reinforced integrated antimony trioxide substitute flame retardant and a preparation method thereof, and belongs to the technical field of flame retardants. The preparation method comprises the steps of preparing a nickel-iron compound, preparing functional composite powder and mixing. The step of preparing the nickel-iron compound comprises the following steps: heating deionized water to 60-65 DEG C, adding nickel nitrate and ferric nitrate, uniformly stirring, adding a cerium nitrate solution and citric acid, stirring for 30-35 minutes, adding ethylene glycol and a kH560 coupling agent solution, stirring for 1.5-2.0 hours, standing, aging, drying, keeping the temperature at 320-350 DEG C for 1.0-1.2 hours, and keeping the temperature at 620-630 DEG C for 3.5-4.0 hours to obtain the nickel-iron compound; the antimony trioxide substituted flame retardant disclosed by the invention can completely and equivalently replace antimony trioxide in the field, and is high in flame retardant property, mechanical property and stability.

This invention discloses a plant-mediated green synthesis method for silver-cerium oxide-attapulgite multifunctional composite nanoenzymes. The method involves mixing cerium nitrate and silver nitrate with an attapulgite suspension, adding honeysuckle extract, adjusting the pH, heating the reaction mixture, centrifuging, washing, drying, and then calcining under a nitrogen atmosphere to obtain the silver-cerium oxide-attapulgite multifunctional composite nanoenzyme. Cerium ions form a complex with the active ingredients in the honeysuckle extract and bind to attapulgite via hydrogen bonds. Calcination yields cerium oxide nanoparticles, while silver ions are reduced by the honeysuckle extract to obtain silver nanoparticles. This invention features a green and environmentally friendly preparation process, simple operation, and easy scale-up. The resulting nanocomposite material exhibits pH-responsive antibacterial and antioxidant multienzyme activity and can be used as an anti-drug-resistant nanomaterial in biomedicine and other fields.

The invention discloses a preparation method of an iron-doped cerium-based perovskite type high-selectivity Cu ion capture stabilizing agent and application of the stabilizing agent in heavy metal pollution remediation, and the stabilizing agent is prepared through a sol-gel method and comprises the steps that cerous nitrate and citric acid are dissolved in water, and the mixture is heated and stirred to be gel-shaped; standing the gel solution in a drying oven at a constant temperature to obtain a Fe-Ce-PVSK precursor; grinding the precursor into powder, putting the powder into a quartz boat, and calcining in an air atmosphere through a horizontal tube furnace to obtain a product; and finally, washing to be neutral to obtain the iron-doped cerium-based perovskite stabilizing agent. Due to the high oxygen vacancy concentration and rich active sites, the stabilizing agent has high selectivity and high adsorption capacity and has specific capturing capacity on Cu < 2 + >. The preparation method has mild reaction conditions. The stabilizing agent can effectively reduce the bio-availability of heavy metals in a polluted matrix, promote healthy growth of plants, and realize pollution restoration and ecological function recovery at the same time.

The invention belongs to the technical field of preparation of copper foils for the electronic industry, and particularly relates to a method for improving the surface corrosion resistance of a copper foil by adopting a 2-mercaptobenzothiazole-cerium composite corrosion inhibitor. The preparation method comprises the following steps: preparing 2-mercaptobenzothiazole; preparing a cerium nitrate solution; preparation of the 2-mercaptobenzothiazole-cerium compound type corrosion inhibitor is carried out; preparing an electro-deposition copper foil; and carrying out corrosion inhibition treatment on the copper foil. According to the method for improving the corrosion resistance of the surface of the copper foil by adopting the 2-mercaptobenzothiazole-cerium composite corrosion inhibitor, the corrosion resistance of the copper foil can be remarkably improved through MBT-Ce corrosion resistance treatment and passivation treatment, so that the service life of the copper foil in a severe environment is prolonged; meanwhile, the surface quality of the copper foil is improved, so that the copper foil is smoother, and subsequent processing and application are facilitated; in addition, the anti-stripping strength value can be improved, so that the adhesive is more durable in the use process; and finally, production efficiency is improved, production cost is reduced, and large-scale production is facilitated.

The invention relates to the technical field of high-performance polyester, and discloses a modified preparation method of functionalized antibacterial polyester fibers, which comprises the following steps: S1, graphene is treated by oxygen-argon mixed plasma to obtain hydroxylated graphene; s2, after hydroxylated graphene is dispersed, cerium nitrate and sodium citrate are added, and cerium-based metallized graphene is obtained; s3, carrying out a reaction on the cerium-based metallized graphene and 3-(2-aminoethylamino) propyltrimethoxysilane, so as to obtain aminated graphene; s4, aminated graphene dicyandiamide, ammonium chloride tetraethoxysilane and hexadecyl trimethyl ammonium bromide are subjected to a reaction, and guanidyl-meso-porous silicon-metal composite graphene is obtained; s5, reacting the product with epsilon-polylysine and polycaprolactone to obtain a modified composite antibacterial agent; s6, treating the polyester fibers with a mixed solution of alkali and a surfactant; s7, the polyester fibers react with a solution containing an antibacterial agent, tetrabutyl titanate, an initiator and a dispersing agent, and a finished product is obtained.

The invention provides a high-performance organosilicon sealant for electronic packaging, and relates to the technical field of organosilicon sealants. The organic silicon sealant is prepared from the following raw materials: methyl vinyl silicone oil, vinyl dimethyl silane, a platinum catalyst, fumed silica, a B4Cw (at) ZrO2 compound, ethynyl cyclohexanol, a silane coupling agent, a titanate coupling agent, a cerium-zinc composite antioxidant and an auxiliary antioxidant. The B4Cw (at) ZrO2 compound is prepared from boron carbide whiskers and nano zirconium oxide sol; the cerium-zinc composite antioxidant is prepared from cerium nitrate, zinc nitrate and ammonia water. The preparation method of the high-performance organic silicon sealant for electronic packaging comprises the following steps: pretreating boron carbide whiskers, synthesizing a B4Cw-coated ZrO2 compound, preparing a cerium-zinc composite antioxidant, preparing a basic rubber material, and preparing the organic silicon sealant. The prepared organic silicon sealant is high in mechanical strength, excellent in elastic property and high in durability.

The invention discloses a uniform carbon-coated lithium iron phosphate cathode material and a preparation method thereof, relating to the technical field of lithium iron phosphate cathode materials. The material comprises lithium iron phosphate matrix particles, wherein the lithium iron phosphate matrix particles are coated with a composite carbon layer, and the composite carbon layer is doped with cerium-modified tantalum carbide nanocrystals. The preparation method of the cerium-modified tantalum carbide nanocrystals comprises the following steps: dissolving tantalum pentaethoxide and cerium nitrate in ethylene glycol, adding urea as a precipitant, and synthesizing a Ta-Ce-O precursor by a microwave-assisted solvent thermal method; mixing the Ta-Ce-O precursor with a phenolic resin, ball milling the mixture, and sintering the mixture to obtain the cerium-modified tantalum carbide nanocrystals. By introducing the cerium-modified tantalum carbide nanocrystals into the composite carbon layer in small amounts and multiple times, uniform coating of the composite carbon layer can be achieved, and the electrochemical performance of the lithium iron phosphate cathode material can be enhanced.

The invention relates to the technical field of catalysts, in particular to preparation and application of a B-site La-doped magnetic nano ZnFe2O4 catalyst.The preparation method of the catalyst comprises the following steps that zinc nitrate, ferric nitrate, lanthanum nitrate and cerous nitrate are selected as base materials, the molar ratio of the zinc nitrate to the ferric nitrate to the lanthanum nitrate to the cerous nitrate is 1: 1.5: 0.5: 0.3, and the molar ratio of the zinc nitrate to the ferric nitrate to the lanthanum nitrate to the cerous nitrate is 1: 1.5: 0.5: 0.3; zinc nitrate, ferric nitrate, lanthanum nitrate and cerous nitrate are dissolved in a eutectic solvent in proportion, then modified citric acid is added as a complexing agent for mixing, and carbon nanotube powder and zinc acetate are added in the process. According to the scheme provided by the invention, the B site of the catalyst is directionally occupied by La, Zn < 2 + > activity loss caused by A site doping is avoided, the stability and catalytic effect of the catalyst are improved by adding Ce, the carbon nanotubes and zinc acetate, and the removal rate of the catalyst to high-concentration or refractory organic matters is improved.

The invention discloses an iron-carbon composite material for heavy metal contaminated soil remediation and a preparation method of the iron-carbon composite material, and belongs to the field of heavy metal contaminated soil remediation. The iron-carbon composite material comprises rape straw, hydroxyapatite, zero-valent iron, sulfydryl functionalized magnetic cerium oxide and nitrogen-doped graphene quantum dot-sodium alginate. The sulfydryl-functionalized magnetic cerium oxide is prepared from cerium nitrate and ferric nitrate through precipitation, calcination and sulfhydrylation, and the nitrogen-doped graphene quantum dot-sodium alginate is prepared from citric acid and urea through microwave reaction, dialysis, mixing and freeze drying; the preparation method comprises the following steps: treating straws and hydroxyapatite to obtain ball-milled phosphorus-containing biochar, mixing the ball-milled phosphorus-containing biochar with zero-valent iron and two modifiers, and carrying out molding and high-temperature calcination to obtain the phosphorus-containing biochar-based composite material. The material has a remarkable remediation effect on the heavy metal contaminated soil, can effectively reduce the activity of heavy metals in the soil, has the characteristics of environmental friendliness and high stability, and is suitable for treating the soil compositely contaminated by the heavy metals such as cadmium and lead.

The invention relates to the technical field of concrete prefabricated components, and particularly discloses high-strength corrosion-resistant concrete for a PHC pipe pile and a preparation method of the high-strength corrosion-resistant concrete. The high-strength corrosion-resistant concrete is prepared from the following raw materials in parts by weight: 12 to 16 parts of silica fume, 30 to 40 parts of cement, 30 to 35 parts of slag powder, 100 to 120 parts of aggregate, 1.5 to 2.5 parts of polycarboxylic acid type water reducing agent, 3 to 5 parts of slow-release type preservative, 0.3 to 0.8 part of organic amino alcohol, 0.1 to 0.3 part of cerous nitrate and 15 to 25 parts of water. The preparation method comprises the following steps: dry-mixing the cement, the slag powder, the silica fume and the slow-release preservative to form a gel mixture; adding water, a polycarboxylate superplasticizer, organic amino alcohol and cerous nitrate into the gelling mixture, and stirring and wet-mixing to obtain the high-strength corrosion-resistant concrete. The composition can be used in projects such as ports, bridges and high-rise buildings, and has the advantages of high strength and good corrosion resistance.

The invention discloses a preparation method of a pH response type core-shell structure cerium oxide abrasive, a chemical mechanical polishing solution and a chemical mechanical polishing process, and belongs to the technical field of chemical mechanical polishing process.The method comprises the following steps that S1, a cerous nitrate aqueous solution and a precipitator are mixed, and cerium oxide (CeO2) nanoparticles are prepared through a hydrothermal reaction; s4, polyacrylic acid-block-polyethylene glycol and the CeO2 (at) mSiO2-NH2 are subjected to a reaction, the reaction product is grafted to the surfaces of the particles through amido bonds, and CeO2 (at) mSiO2 (at) PAA-b-PEG is obtained; and S5, dispersing the obtained CeO2 (at) mSiO2 (at) PAA-b-PEG in a trivalent cerium salt solution, and enabling Ce < 3 + > to be loaded on a PAA chain through ion exchange, so as to obtain CeO2 (at) mSiO2 (at) PAA-b-PEG < 3 + >. The chemical mechanical polishing solution can achieve high removal in the sensing stage, the polishing early stage and the polishing middle stage and high protection in the polishing later stage.