109 results about "Chloroplatinic acid" patented technology

The invention discloses a method for preparing a carbon monoxide normal-temperature oxidation catalyst by using electrolytic manganese residues and oil sludge, which comprises the following steps: uniformly mixing the oil sludge and the electrolytic manganese residues to obtain manganese oil sludge, uniformly stirring the manganese oil sludge and mixed halophilic desulfurizing bacteria, fermenting, and drying to constant weight to obtain fermented manganese oil sludge, the method comprises the following steps: carbonizing dry fermented manganese oil sludge to obtain a manganese carbide oil material, uniformly mixing the manganese carbide oil material with a blueberry extract to obtain a manganese carbide oil extract mixture, uniformly mixing and stirring the obtained manganese carbide oil extract mixture with a chloroplatinic acid solution, standing, filtering, washing, and drying to obtain the mixed halophilic desulfurizing bacteria. Drying to constant weight to obtain a platinum-doped carbonization extraction precursor, and finally roasting the platinum-doped carbonization extraction precursor to obtain the carbon monoxide oxidation catalyst. The composite catalyst with high specific surface area and multiple active sites is formed, and resource utilization of waste is achieved.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

The invention discloses a preparation method of a titanium anode for disinfecting a swimming pool. The preparation method comprises the following steps: carrying out surface pretreatment on a titanium substrate; preparing a coating solution A, a coating solution B, a coating solution C and a coating solution D, wherein the coating solution A is a chloroplatinic acid n-butyl alcohol solution with the concentration of 0.05-0.1 mol / L; the coating liquid B is an n-butyl alcohol mixed solution containing chloroplatinic acid and tantalum pentachloride, and the total metal ion concentration of the coating liquid B is 0.05-0.1 mol / L; the coating liquid C is an n-butyl alcohol mixed solution containing chloroplatinic acid and ruthenium trichloride, and the total metal ion concentration of the coating liquid C is 0.6-0.8 mol / L; the coating liquid D is a butanol solution containing ruthenium trichloride, and the total metal ion concentration of the coating liquid D is 0.3-0.5 mol / L; and the surface of the titanium substrate is sequentially coated with the coating liquid of all the coatings, drying and sintering treatment are conducted after coating of each coating, and a compact bottom layer, a middle buffer layer, a transition layer and a surface active layer are sequentially formed. According to the preparation method of the titanium anode for disinfecting the swimming pool, an optimized micro-crack structure which is controlled in crack number, small in size and uniform in distribution is constructed, so that the service life of the anode is remarkably prolonged while the efficient disinfecting capacity is guaranteed. The invention also provides the titanium anode prepared by the method.

The invention relates to a preparation method of a hydrolysis modified organic silicon high-temperature-resistant anticorrosive coating, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: heating 1, 1 '-bis (dimethylsilyl) ferrocene, methylbenzene, chloroplatinic acid, 2, 2, 3, 3, 4, 4, 4-heptafluorobutyl acrylate and bis-(2-methylallyl) cyclooctyl-1, 5-diene ruthenium, and reacting to obtain an intermediate product 1; weighing methyltrimethoxysilane, phenyltrimethoxysilane and the intermediate product 1, uniformly stirring and mixing, slowly dropwise adding diluted hydrochloric acid, hydrolyzing, and heating to react, so as to obtain modified silicon resin; adding the modified silicon resin into petroleum ether, and adding silicone oil, an organic tin catalyst, a bis-ammonia coupling agent, filler and a curing agent to obtain the anticorrosive paint.

The present application relates to the technical field of catalytic hydrogenation reaction, and discloses a preparation method and application of an organic phosphine shell modified nanocatalyst, which comprises the following steps: adding a carbon carrier in an alcohol solvent and ultrasonic dispersion, then adding a chloroplatinic acid containing alcohol solution, and stirring at 0-15 DEG C; subsequently, an organic phosphine containing alcohol solution and a reducing agent are added, and the stirring is continued; finally, rotary evaporation is carried out, and drying is performed to obtain the nanocatalyst; the nanocatalyst is a platinum catalyst with a core-shell structure loaded on the surface of the carbon carrier. By introducing the organic phosphine ligand to the surface of the nanometer platinum particles, the core-shell structure nanoparticles with a flexible organic phosphine ligand modified shell are constructed, the adsorption and desorption strength and configuration of the active site electronic structure, the reaction microenvironment, the reactants and the intermediate state of the reaction interface are regulated, and the selective and efficient hydrogenation of the aromatic hydrocarbon containing nitro or carbon-carbon double bond is realized.

The invention relates to the technical field of preparation of alloy electrocatalysts, in particular to a method for preparing an alloy electrocatalyst by a rotary microwave-assisted method, which comprises the following steps: stirring and mixing carbon powder, cobalt chloride, deionized water and absolute ethyl alcohol, adding ammonia water, ultrasonically dispersing, filtering and collecting a filter cake, and drying to obtain the alloy electrocatalyst. Drying, heating, introducing hydrogen, carrying out heat preservation treatment, and collecting to obtain a precursor; taking the precursor, adding ethylene glycol, a sodium hydroxide solution, chloroplatinic acid and deionized water, carrying out ultrasonic-assisted treatment, collecting to obtain a mixed solution, placing the mixed solution in a sealed reaction device, and carrying out rotary microwave treatment; and carrying out pressure treatment, filtering, taking a filter cake, drying, heating, carrying out heat preservation and annealing treatment, collecting an annealed material, carrying out acid pickling treatment, and drying. The synergistic effect of the rotating microwaves ensures that the materials are uniformly heated, the particle aggregation phenomenon is reduced, a foundation is laid for the high activity and durability of the catalyst, and the method is more suitable for industrial large-scale production.

The invention belongs to the technical field of oil-based super lubrication, and particularly relates to a construction method of super-lubrication low-viscosity polar polyether modified silicone oil. The preparation method comprises the following steps: reacting allyl polyether with hydrogen-containing silicone oil according to a mass ratio of (70-80): 1 under the catalytic condition of chloroplatinic acid to obtain low-viscosity polar polyether modified silicone oil, and mixing 0.5 wt.%-1.5 wt.% of a polar additive, 0.1 wt.%-0.5 wt.% of surface functionalized nanoparticles and 97.5 wt.%-99.4 wt.% of the low-viscosity polar polyether modified silicone oil according to mass percent to obtain the compound lubricating oil. Performing ultrasonic treatment on the composite lubricating oil, and standing to obtain the super-lubricating low-viscosity polar polyether modified silicone oil. The polar additive molecules and the small-size and easy-to-disperse functional nanoparticles are compounded at the same time, so that the interaction between a lubricating film and a friction surface is remarkably enhanced in a cross-scale manner, and a friction pair motion interface is promoted to form a friction composite film with high bearing and low shearing characteristics; and stable ultralow friction and abrasion under the working conditions of wide rotating speed and wide load are achieved, and theoretical and technical supports are provided for engineering application of the oil-based super-lubrication technology.

The application discloses a precious metal embedded porous carbon coated honeycomb ceramic monolithic catalyst and application thereof. The liquid phenolic resin polymer containing chloroplatinic acid is uniformly coated on the surface of the cordierite honeycomb ceramic through impregnation treatment; in an oxygen-nitrogen mixed atmosphere, one-stage solidification makes the liquid phenolic resin polymer containing chloroplatinic acid coated on the surface of the cordierite honeycomb ceramic completely solidified; two-stage calcination makes oxygen react with chloroplatinic acid, so that the chloroplatinic acid is decomposed, and the negative influence of chloride ions on the catalyst is eliminated; in an inert gas argon atmosphere, carbonization makes the phenolic resin polymer carbonize under high-temperature conditions to form porous carbon, and meanwhile, platinum ions are reduced to platinum single elements and embedded by the porous carbon, so that the precious metal (platinum, iridium) embedded porous carbon coated honeycomb ceramic monolithic catalyst is finally prepared.

The application discloses a wear-resistant EVA material and a preparation method thereof, and relates to the technical field of polymer materials. In the preparation of the wear-resistant EVA material, modified nano cellulose is prepared by reacting nano cellulose and a triazole type ultraviolet absorber; modified silicon dioxide is prepared by sequentially reacting silicon dioxide with 4-anilinoethyl triethoxysilane and 4-vinyl aniline; modified ethylene-vinyl acetate copolymer is prepared by sequentially reacting ethylene-vinyl acetate copolymer with allyl phosphine dichloride and eugenol; the modified ethylene-vinyl acetate copolymer, the modified nano cellulose, the modified silicon dioxide, hydrogen-containing silicone oil and chloroplatinic acid are melt-mixed to prepare the wear-resistant EVA material by compression molding. The wear-resistant EVA material prepared by the application has excellent wear resistance, flame retardation and anti-aging performance.

This invention belongs to the field of biosensing technology, specifically relating to a modified carbon fiber electrode for detecting dopamine, its preparation method, and its application. The modified carbon fiber electrode comprises a carbon fiber electrode onto which gold-platinum bimetallic nanoparticles and polydopamine are sequentially modified. The preparation method specifically includes: firstly, modifying the surface of activated carbon fiber filaments with chloroauric acid and sodium citrate to obtain Au@CF; then, modifying the Au@CF surface with ascorbic acid and chloroplatinic acid to obtain platinum nanoparticles, obtaining Au / Pt@CF; finally, immersing the Au / Pt@CF in a dopamine solution to coat the Au / Pt@CF surface with polydopamine, obtaining PDA@Au / Pt@CF. This electrode has advantages such as high sensitivity, low detection limit, strong anti-interference ability, good biocompatibility, and high mechanical stability, making it suitable for dynamic monitoring of dopamine in the living brain.

The application relates to a preparation method of a Pt single-atom nanoscale enzyme and application of the Pt single-atom nanoscale enzyme in detection of cardiac troponin I, and the preparation method comprises the following steps: 1) ultrasonic dispersion of cobalt salt, selenium powder, chloroplatinic acid, urea and sodium chloride in an alcohol solvent, heating and stirring until the solvent is completely volatilized, grinding the solid mixture into a powder; 2) performing Joule heat treatment on the powder in a heating device under an air atmosphere, and performing washing and vacuum drying on the reactants to obtain the Pt single-atom nanoscale enzyme. In the one-step chemical reaction process, Se doping is introduced to construct oxygen vacancies, rapid heating and structure shaping are realized by combining the Joule heat treatment, a Pt single-atom catalyst loaded with Se-doped Co3O4 is obtained, the oxygen vacancies and the Se doping sites are used as anchor sites in cooperation, the Pt single atoms are effectively fixed, and the loading capacity and the dispersity of the Pt single atoms are improved. The obtained material shows excellent POD-like enzyme activity, can be used for constructing a high-sensitivity colorimetric immunoassay system, and realizes rapid and accurate detection of cTnI.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

The invention belongs to the technical field of hydrogen-sensitive materials, and particularly relates to a preparation method of a vanadium-containing modified tungsten oxide-titanium dioxide composite hydrogen-sensitive color-changing material, which comprises the following steps: S1, selecting ammonium metatungstate and ammonium metavanadate as raw materials, adding deionized water, stirring and dissolving, adding titanium dioxide, and carrying out ultrasonic dispersion and magnetic stirring for 30 minutes to form a uniform suspension; s2, drying the mixed solution obtained in the step S1 in a drying oven until the weight is constant, and calcining the dry powder in a muffle furnace; s3, weighing chloroplatinic acid, dissolving the chloroplatinic acid in deionized water, adding the dry powder obtained in S2 into the solution, uniformly stirring, drying, and calcining in a muffle furnace to form a Pt-loaded composite material; the color of the material prepared in the S3 turns into dark blue from light grey after meeting hydrogen. The whole preparation and detection process is high in efficiency, quick in response, simple in technological process and free of secondary pollution.

The invention discloses a preparation method and application of a nickel-molybdenum polyacid-polymer-based self-supporting electrocatalyst with low platinum-carbon loading capacity, and relates to the technical field of electrocatalysts. The preparation method of the electrocatalyst comprises the following steps: weighing raw materials for preparing an electrolyte solution; comprising nickel sulfate, ammonium molybdate, chloroplatinic acid, borax, polyvinyl alcohol and chitosan. Uniformly mixing the raw materials with deionized water to obtain a nickel molybdenum polyacid solution, a borax solution and a PVA-CS solution, obtaining a target electrolyte solution, and soaking the target electrolyte solution with carbon paper; freezing and drying; performing carbonization; the treated carbon paper is used as a working electrode, a saturated calomel electrode is used as a reference electrode, and a graphite electrode is used as an auxiliary electrode; and platinum is electrodeposited on the carbon paper by adopting a cyclic voltammetry electrodeposition method to prepare the electrocatalyst. According to the prepared electrocatalyst, the cost can be reduced, the reaction kinetics of an alkaline solution and alkaline seawater can be improved, the overpotential can be reduced, the stability can be improved, and the alkaline seawater electrolysis process is more economical and efficient.

The invention belongs to the technical field of recycling of rare and noble metal secondary resources, and discloses a method for preparing a tungsten compound and chloroplatinate from a waste catalyst and application of the method. The method comprises the following steps: (1) firing and crushing the waste catalyst, (2) reacting the waste catalyst with acid, (3) filtering and discarding filtrate, (4) reacting the precipitate with ammonia water, filtering to obtain an ammonium tungstate solution, and retaining filter residues; (5) concentrating the ammonium tungstate solution, crystallizing, separating and drying to obtain an ammonium paratungstate finished product; and (6) reacting the filter residues retained in the step (4) with aqua regia to prepare chloroplatinate. And (7) firing the ammonium paratungstate at a high temperature to obtain tungsten trioxide. According to the method, tungsten and platinum can be effectively separated from the carrier, and the recovery rate of rare and precious metals is increased.

The application belongs to the technical field of preparation of electrocatalytic hydrogen evolution catalysts, and discloses a preparation method of an electrocatalytic hydrogen evolution catalyst Pt / GaN. First, gallium nitride nanoparticles are loaded on the surface of an electrode, and then, through cyclic voltammetry, platinum is uniformly electrodeposited on the surface of the gallium nitride from an electrolyte containing chloroplatinic acid to prepare the catalyst Pt / GaN. The mass percentage of Pt in the catalyst is only 2.2-5.4%, which greatly improves the catalytic activity of the catalyst while reducing the Pt loading. From the entire preparation process, the application breaks through the limitation that the traditional platinum loading method cannot accurately control the particle size growth. The particle size of Pt in the catalyst is between 2-5 nm. On the other hand, the method has the advantages of easy availability of raw materials and environmental protection without pollution.

The invention belongs to the technical field of analysis detection and electrochemistry, and particularly relates to a preparation method of an electrochemical sensor based on monatomic Pt and application of the electrochemical sensor to detection of neonicotinoid pesticides. Glucose is used as a carbon source, chloroplatinic acid is used as a metal precursor, a rapid pyrolysis method is adopted to controllably synthesize GFs-loaded monatomic Pt, agglomeration of monatomic is avoided, and the prepared sensor shows good repeatability, reproducibility and stability, can be used for sensitive detection of CLO in fruit and vegetable samples, and has good application prospects. A novel method is provided for detecting the neonicotinoid insecticides in food.

The present application belongs to the field of biomedicine, and relates to an inducer for inducing mesenchymal stem cells to differentiate into estradiol-secreting cells. The inducer for inducing mesenchymal stem cells to differentiate into estradiol-secreting cells is based on a human mesenchymal stem cell serum-free culture medium, and is composed of the following components in a mass concentration ratio: bone morphogenetic protein-4 20-60 mg / L, bone morphogenetic protein-7 20-60 mg / L, tretinoin 2-8 mg / L, resveratrol 2-8 mg / L, icariin 2-8 mg / L, benzamide 2-8 ug / L, chloroplatinic acid hexahydrate 2-8 ug / L, ethanolamine 2-8 ug / L, erythropoietin 2-10 ug / L, and vascular endothelial growth factor 2-10 ug / L. The inducer for inducing mesenchymal stem cells to differentiate into estradiol-secreting cells has high induction efficiency.

The application provides application of a graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots in plastic hydrogen production, relates to the fields of material preparation and photocatalysis, and aims to solve the problem of low photocatalytic efficiency of photocatalysts. The preparation method comprises the following steps: taking urea as raw material, and preparing carbon nitride blocks by a modified thermal etching method; taking citric acid and urea as raw material, and preparing carbon dots by a thermal etching method; taking the carbon nitride blocks and the carbon dots as raw materials, and preparing carbon dot-graphite-phase carbon nitride composite materials by a thermal treatment method; and taking the carbon dot-graphite-phase carbon nitride composite materials and chloroplatinic acid as raw materials, and preparing the graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots by a freeze photoreduction method. The graphite-phase carbon nitride photocatalyst loaded with platinum monomers and carbon dots prepared by the preparation method has high-activity platinum monomer hydrogen production sites and excellent light-generated electron transfer capacity, so that the photocatalytic hydrogen production efficiency is greatly improved.

The invention discloses a sulfur-tolerant platinum-based catalyst and a preparation method thereof, and the preparation method of the sulfur-tolerant platinum-based catalyst comprises the following steps: weighing roasted ZrO2 as a carrier, weighing ammonium metatungstate, completely dissolving in deionized water, dropwise adding the solution until the carrier is completely immersed, and carrying out ultrasonic treatment; standing at room temperature, drying, and roasting in air at 500-600 DEG C to prepare a tungsten oxide loaded solid acid composite carrier WO3-ZrO2; and weighing chloroplatinic acid, completely dissolving the chloroplatinic acid in deionized water, dropwise adding the solution into the composite carrier, completely immersing the composite carrier, carrying out ultrasonic treatment, standing at room temperature, drying, and roasting in air at 250-350 DEG C to obtain the sulfur-tolerant platinum-based catalyst. The catalyst is simple in preparation method, has relatively strong tolerance to different sulfur species, and has good low-temperature catalytic performance and catalytic stability to low-carbon alkane.

The application discloses imprint resin, a preparation method thereof and application of the imprint resin in platinum recovery. The preparation method of the imprint resin comprises the following steps: S1, performing a nucleophilic substitution reaction on chloromethyl polystyrene resin and N-(2-mercaptoethyl) acrylamide in a solvent, and collecting the resin after the reaction is completed; S2, adding a chloroplatinic acid solution to the resin obtained in the step S1, and performing a coordination reaction; S3, adding a crosslinking agent and an initiator to the system obtained in the step S2, and performing a polymerization reaction, and collecting the resin after the reaction is completed; and S4, adding an eluent to the resin obtained in the step S3, and performing desorption of chloroplatinic acid root ions, so as to obtain the imprint resin. The imprint resin has high selectivity, high adsorption capacity and good regeneration performance on chloroplatinic acid root ions, and is suitable for efficient recovery and resource utilization of platinum.

The invention discloses an electrochemical sensor working electrode and a preparation method and application thereof, and belongs to the technical field of electrochemical sensing. Firstly, organic semiconductor micromolecules (PTCK) are prepared as organic ligands, then the organic semiconductor micromolecules, chloroplatinic acid and few layers of graphene oxide are prepared into a PTCK-Pt-GO compound through a hydrothermal method, and then the graphene composite film (P-Pt-G) loaded with platinum nanoparticles is prepared on the surface of a working electrode area through in-situ electrochemical reduction. According to the functionalized graphene composite film prepared through electrochemical reduction, platinum nanoparticles are uniformly dispersed, more catalytic sites can be exposed, the detection capacity of hydrogen peroxide is improved, and the functionalized graphene composite film can be applied to preparation of a high-sensitivity hydrogen peroxide electrochemical sensor. The preparation process provided by the invention is simple, and the sensor has relatively low detection line and good detection performance.

The application discloses a kind of Pt nanoparticle load Fe-based MOF photocatalyst and its preparation method and application, belong to environmental energy technical field.The preparation method disclosed in the application uses 2-amino terephthalic acid, FeCl3·6H2O and aqueous solution of chloroplatinic acid hexahydrate as raw material, through hydrothermal reaction, Pt nanoparticle is dispersed in situ and loaded NH2-MIL-101 (Fe), reduces interface charge transfer resistance, inhibits the recombination of photo-generated carriers, to further improve the photocatalytic nitrogen fixation activity, using the synergistic effect of NH2-MIL-101 (Fe) composite photocatalyst containing Pt nanoparticle to achieve the purpose of improving the yield of photocatalytic conversion of nitrogen to ammonia, significantly solve the high energy consumption and environmental pollution problem of traditional industrial nitrogen fixation Haber-Bosch method.

The application relates to the technical field of platinum recovery, and particularly discloses a method for purifying and recovering platinum. The method for purifying and recovering platinum comprises the following steps: extracting chloroplatinate ions from a liquid to be purified by using an organic extractant, the liquid to be purified being an aqueous solution in which platinum exists in the form of chloroplatinate ions, and separating an organic phase; the organic extractant is obtained by dispersing 2-(thiophenylmethyl) diethyl phosphonate in methyltrioctylammonium chloride; reacting the chloroplatinate ions in the organic phase with an aqueous reagent, separating the organic phase and the aqueous phase, back-extracting platinum into the aqueous phase, and separating the aqueous phase; adding a reagent to the aqueous phase to convert the platinum into a precipitate; separating the precipitate, and calcining to obtain elemental platinum. The methyltrioctylammonium chloride and 2-(thiophenylmethyl) diethyl phosphonate synergistically extract the chloroplatinate ions with high selectivity, have extremely high extraction capacity, reduce the amount of the organic extractant, and reduce the pressure of subsequent treatment of the organic extractant.

The invention discloses a spatial reticular silicon paste type defoaming agent as well as a preparation method and application thereof. The preparation method comprises the following steps: putting fluorine-containing ethynyl MQ silicon resin, hydrogen-containing silicone oil, hydroxyl silicone oil, hydrophobic SiO2 and dimethyl silicone oil into a reaction kettle, carrying out nitrogen protection, stirring and heating to 65-90 DEG C, adding chloroplatinic acid, carrying out an addition reaction for 0.5-2 hours, then adding a base catalyst, continuing to heat to 120-140 DEG C, carrying out a condensation polymerization reaction for 2-4 hours, cooling and discharging to obtain spatial reticular silicon paste; mixing the spatial reticular silicon paste, the polyether modified silicone oil, polyether and the emulsifier, stirring and heating to 55-65 DEG C, adding deionized water for phase inversion emulsification, cooling, adding deionized water, and adding the thickener to obtain the spatial reticular silicon paste type defoaming agent. Compared with the traditional silicon paste type defoaming agent in papermaking pulping, especially chemical pulping, the defoaming agent prepared by the invention has the characteristics of high black liquor defoaming speed, good foam inhibition property, good pulp washing water filtration property, no toxicity, no harm and simple preparation process.

This invention relates to the field of metal surface treatment technology, and more particularly to an apparatus, a chemical plating solution, and a method for electroless plating of platinum into the inner cavity of a workpiece. Addressing the problems of poor reducing agent stability, short solution life, poor coverage of the inner cavity, low deposition rate, and insufficient coating adhesion in existing electroless plating technologies, this invention provides a chloroplatinic acid plating solution using ethylene glycol as both a reducing agent and solvent, combined with a three-temperature zone circulating flow device for electroless plating. The plating solution includes chloroplatinic acid, ethylene glycol, a complexing agent, a stabilizer, and a pH adjuster. The apparatus includes a preheating tank (60-120°C), an electroless plating tank (130-160°C), and a rapid cooling tank (0-30°C). The electroless plating solution flows through the inner cavity of the workpiece under the drive of a circulating pump, sequentially passing through the three temperature zones. By controlling the plating solution composition, pH value, reaction temperature, and circulation flow method, this invention significantly improves the uniformity and quality of electroless plating of platinum into the inner cavity, resulting in a long solution life and a dense, strong coating.

The invention belongs to the field of antibacterial material synthesis, and relates to a preparation method of Ag / Pt bimetal cluster modified nitrogen / boron co-doped carbon porous microspheres and a product and application thereof.The preparation method comprises the steps that urea, boric acid, polyethylene glycol and zinc nitrate hexahydrate are evenly mixed and subjected to heat treatment in the atmosphere of air and nitrogen, and the nitrogen / boron co-doped carbon porous microspheres are obtained; placing the microspheres in a nitric acid aqueous solution, removing Zn ions in the system, reserving vacancies for subsequent Ag and Pt modification, placing the obtained sample in a mixed solution of silver nitrate and hexachloroplatinic acid, freeze-drying to ensure that the silver nitrate and hexachloroplatinic acid are uniformly attached to the interiors and surfaces of the pores of the porous microspheres, and then performing heat treatment in a hydrogen-argon mixed gas atmosphere to obtain the silver / Pt / Ag composite microspheres. And reducing silver nitrate and hexachloroplatinic acid to obtain the Ag / Pt bimetallic cluster modified nitrogen / boron co-doped carbon porous microspheres. The prepared antibacterial material is good in high-temperature stability and excellent in performance, can meet the requirements of various fields for efficient, long-acting and safe antibacterial agents, is particularly used for preparing plastic with an antibacterial function through a direct addition method or an antibacterial master batch method, can also be used for forming fibers with antibacterial and peculiar smell removal functions through a melt spinning or solution spinning process, and is suitable for industrial production. The antibacterial agent can also be dispersed in a solution to carry out post-treatment on textiles and the like so as to realize antibacterial and odor-removing functions.

This invention discloses a Pt-CoMo-NC hollow structure catalyst for hydrogen production from ammonia borosilicate hydrolysis and its preparation method. The preparation method includes: dissolving cobalt nitrate in methanol; dissolving 2-methylimidazole in another methanol solution; rapidly adding the cobalt nitrate methanol solution to the 2-methylimidazole methanol solution under stirring, continuing stirring at 25-30℃ for 10-72 h, centrifuging, washing, and vacuum drying to obtain ZIF-67 powder; completely dissolving a Mo source and chloroplatinic acid in a solvent, adding the ZIF-67 powder to the solution under stirring at 20-35℃, and continuing stirring at this temperature for 10-60 min; continuously stirring at 60-80℃ until the solvent is completely evaporated to obtain MoPt / ZIF-67; and carbonizing MoPt / ZIF-67 in an inert gas at a temperature of 500-950℃ to obtain the Pt-CoMo-NC catalyst. This catalyst exhibits excellent performance in catalyzing the hydrogen production from ammonia borosilicate hydrolysis and has promising application prospects.

The invention provides a Pt / PEDOT composite modified carbon-based material needle-shaped electrode in-vivo dissolved oxygen electrochemical sensor as well as a construction method and application thereof, and belongs to the technical field of medical biology. According to the in-vivo dissolved oxygen electrochemical sensor, a carbon-based material microneedle type electrode is modified by electrochemical deposition of platinum nanoparticles by using a chloroplatinic acid hexahydrate solution and depending on a time current method, and poly (3, 4-ethylenedioxythiophene) is generated by direct electro-polymerization on the surface of the Pt-modified microneedle electrode through an electrochemical constant current method. And forming uniform PEDOT (poly (3, 4-ethylenedioxythiophene)) film coated and modified platinum nanoparticles on the microneedle electrode. The composite modified carbon-based material is used for replacing precious metal to reduce cost and improve biocompatibility, low-oxygen sensitivity is optimized by means of composite modification, in-vivo protein adsorption and biological membrane coverage are resisted through anti-pollution surface modification, and therefore the defects are overcome, and monitoring of in-vivo tissue oxygen partial pressure is achieved.

The application relates to the technical field of catalytic combustion of ethane, and discloses a preparation method and application of a catalytic combustion catalyst for ethane, which comprises the following steps: (1) dissolving chloroplatinic acid, a transition metal M1 nitrate and a rare earth metal M2 nitrate in water to obtain a mixed salt solution; and dripping the mixed salt solution into a molecular sieve carrier to perform impregnation, so as to obtain a solid A; (2) pre-drying the solid A, and then continuously drying after temperature rising, so as to obtain a powder B; and (3) performing aerobic calcination on the powder B, so as to obtain a catalyst; the catalyst is PtM1M2 / S, wherein M1 is one or more of iron, cobalt, nickel, manganese and copper, M2 is one or more of cerium, lanthanum, scandium, yttrium and samarium, and S is a molecular sieve carrier. The rare earth metal and the transition metal are synergistically doped, a strong interaction is formed between the rare earth metal and the transition metal and the noble metal platinum, the activation of ethane can be effectively enhanced, the reaction temperature can be reduced, and the conversion rate and stability of ethane can be improved.