395 results about "Chloroplatinic acid" patented technology

The invention belongs to the technical field of pyridone ethanolamine salt synthesis, and discloses an environment-friendly pyridone ethanolamine salt preparation process which comprises the following preparation steps: enabling isononanoyl chloride and 3, 3-methyl dimethacrylate to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester, and enabling the 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester. The preparation method of the solid acid catalyst comprises the following steps: S1, taking water as a solvent, adding 14-16 parts by weight of zirconium oxychloride, 1-3 parts by weight of titanium sulfate, 0.1-0.5 part by weight of chloroplatinic acid and 0.05-0.4 part by weight of cerium chloride, adjusting the pH value to 10-11, and aging to obtain a precipitate; s2, roasting the precipitate obtained in the step S1 in an air atmosphere at 500-600 DEG C to obtain a solid acid catalyst; the method has the advantages that the catalyst is easy to recycle, and the reusability is high.

The invention relates to a preparation method of Pt monatomic nano-enzyme and application of Pt monatomic nano-enzyme in cardiac troponin I. The preparation method comprises the following steps: 1) ultrasonically dispersing cobalt salt, selenium powder, chloroplatinic acid, urea and sodium chloride in an alcohol solvent, heating and stirring until the solvent is completely volatilized to obtain a solid mixture, and grinding the solid mixture into powder; and 2) placing the powder in a heating device, carrying out Joule heat treatment in an air atmosphere, washing a reactant, and carrying out vacuum drying to obtain the Pt monatomic nano-enzyme. Se doping is introduced in the one-step chemical reaction process to construct oxygen vacancies, rapid heating and structural shaping are achieved in combination with Joule heat treatment, the Se-doped Co3O4-loaded Pt monatomic catalyst is obtained, the oxygen vacancies and Se doping sites are synergistically used as anchoring sites, Pt monatomic atoms are effectively fixed, and the loading capacity and dispersity of the Pt monatomic 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 invention discloses a preparation method and application of a metal nitrogen-carbon loaded high-load platinum catalyst, and belongs to the field of four-electron oxygen reduction. The method comprises the following steps: firstly, dispersing a synthesized metal carrier in ethylene glycol, carrying out uniform ultrasonic treatment, dropwise adding a chloroplatinic acid solution, continuously carrying out uniform ultrasonic dispersion, dropwise adding sodium hydroxide until the pH value is 11, and stirring for 2 hours; reacting the reaction liquid in an oil bath at 125 DEG C for 3 hours, cooling to room temperature, adding hydrochloric acid to settle the reaction liquid, washing with a large amount of water, and drying in vacuum to obtain the target catalyst. According to the synthesis method, relatively environment-friendly solvents such as methanol and ethylene glycol are used, so that the pollution to the environment is reduced, the used raw materials are relatively cheap, the energy consumption in the preparation process is relatively low, and the production cost of the catalyst is favorably reduced. The prepared catalyst shows excellent oxygen reduction performance and has a good industrial prospect.

The invention relates to the technical field of high polymer material chemistry, and discloses a high and low temperature resistant anti-yellowing optical adhesive and a preparation process thereof, the high and low temperature resistant anti-yellowing optical adhesive comprises the following components by weight: 40-60% of modified organic silicon resin, 20-30% of urethane acrylate, 10-15% of alicyclic epoxy resin, 0.5-5% of a nano inorganic filler, 0.8-2.5% of an anti-yellowing composite reagent, and the balance of a solvent. The coating is prepared from the following components in percentage by weight: 0.5 to 1.5 percent of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 0.1 to 0.3 percent of fluorine modified polyacrylate flatting agent and 0.3 to 1.0 percent of chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst. The preparation method comprises the following steps: mixing alpha, omega-dihydroxy polydimethylsiloxane and phenyltrimethoxysilane according to a mass ratio of 8: 2-7: 3, adding 0.3-1.0% of a chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst, and raising the temperature by stages under the protection of nitrogen, so that the glass transition temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C, and the temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C below zero. And the long-term service requirement of the optical device in an extreme temperature environment is met.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention discloses a foam iron-nickel surface in-situ growth platinum modified nickel-iron layered double hydroxide bifunctional material and a preparation method and application thereof.The preparation method comprises the steps that a foam iron-nickel substrate is immersed in an acid solution containing chloroplatinic acid, heating treatment is conducted for a certain period of time, and then the nickel-iron layered double hydroxide bifunctional material is obtained; and a nickel-iron layered double-metal hydroxide mixed material modified by platinum nanoparticles grows on the surface of the foam iron-nickel in situ. In the preparation process of the one-step method, nickel ions or / and iron ion salts and sacrificial agents do not need to be additionally added, atom economy is good, reaction conditions are mild, energy consumption is low, and meanwhile the problem that the catalyst is prone to falling off due to multiple times of operation and washing is solved. The platinum / ferronickel layered bimetal hydroxide / foam iron nickel electrode prepared by the method shows excellent hydrogen production and oxygen production activity in an alkaline water electrolysis reaction.

The invention relates to an improved photoelectric coupler packaging electroplating technology which comprises the following steps that S10, self-repairing microcapsules are dispersed into electroplating liquid, the microcapsules comprise wall materials and core materials, and the core materials comprise vinyl siloxane and chloroplatinic acid catalysts; s20, sequentially forming a nano gradient composite coating structure on the surface of the substrate, wherein the composite coating structure comprises a substrate layer, a transition layer, a main functional layer and a packaging layer; and S30, carrying out micro-area deposition by adopting a light-induced selective electroplating process, wherein the micro-area deposition comprises laser micro-area activation, pulse electroplating deposition and in-situ ultraviolet curing. According to the electroplating process, through the nanometer gradient composite coating structure, the interface stress concentration is reduced through layer-by-layer transition of the material and the thickness, the thermal cycle resistance of the coating is improved, and meanwhile the balance among conductivity, mechanical strength and thermal stability is achieved.

The invention provides a catalyst for preparing phenol through catalytic hydrogenation of guaiacol as well as a preparation method and application of the catalyst. The preparation method of the catalyst comprises the following steps: fully dissolving magnesium nitrate, P123 and urea in deionized water, carrying out hydrothermal reaction, filtering, washing, drying and roasting to obtain an MgO carrier; immersing the MgO carrier in an alkali metal nitrate aqueous solution, drying and roasting to obtain an alkali metal element loaded MgO carrier; the alkali metal is selected from one of Li, Na, K or Cs; and immersing the alkali metal element loaded MgO carrier in a methanol solution of chloroplatinic acid, removing methanol, drying, and then carrying out reduction treatment to obtain the catalyst. The catalyst disclosed by the invention is applied to catalytic hydrodeoxygenation of guaiacol and shows excellent catalytic performance, the hydrodeoxygenation reaction conditions are mild, and the target product phenol can be obtained with high selectivity and high yield.

The invention discloses a fuel cell cathode catalyst and a preparation method thereof, and belongs to the technical field of fuel cells. The preparation method of the fuel cell cathode catalyst comprises the following steps: adding a modified multi-walled carbon nanotube into a chloroplatinic acid aqueous solution with the mass concentration of 5g / L, carrying out ultrasonic treatment at 30-50 DEG C for 1-2 hours, and then carrying out freeze drying; and putting the dry powder into a horizontal tube furnace, introducing inert gas as protective gas, heating to 450-500 DEG C, preserving heat for 1 hour, cooling to room temperature along with the furnace, and taking out to obtain the fuel cell cathode catalyst. The modified multi-walled carbon nanotube is MWCNT / PEI / 5-formyl-2-thiopheneboronic acid, and the 5-formyl-2-thiopheneboronic acid is grafted after the PEI is grafted on the surface of the MWCNT, so that the dispersity of the MWCNT can be obviously improved, the agglomeration phenomenon of the MWCNT is reduced, the dispersion is more uniform, the loading capacity of platinum is high, the electrocatalytic activity of the catalyst is obviously enhanced, and the dosage of platinum is reduced.

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 relates to the technical field of catalyst preparation, and provides a nitrogen-containing molecule modified MXene loaded Pt monatomic catalyst, a preparation method and application, the preparation method comprises the following steps: S1, preparing an NH2 / CC electrode; s2, dipping the NH2 / CC electrode in a mixed solution of an MXene suspension and chloroplatinic acid hexahydrate at room temperature for reaction, and then irradiating and drying with a mercury lamp to obtain an NH2-MX / Pt-CC electrode; and S3, carrying out secondary amino modification to obtain the catalyst containing nitrogen molecule modified MXene to load Pt single atoms. According to the preparation method of the catalyst with the nitrogen-containing molecule modified MXene loaded with the Pt single atoms, the atom utilization rate of the material is effectively increased, reaction active sites are increased, meanwhile, the interaction between the two-dimensional material and the Pt atoms is enhanced, and the stability of the catalyst under the industrial and current density is improved.

The invention relates to a Cu2-xSe-Pt nano material, a microneedle patch, a preparation method and application. The Cu < 2-x > Se (at) Pt nano material is composed of a Cu < 2-x > Se nanosphere and platinum modified on the surface of the Cu < 2-x > Se nanosphere in situ. The invention provides a preparation method of a Cu2-xSe-Pt nano-material, which comprises the following steps: adding PSS, SeO2 and AA into water, heating and stirring, adding copper salt and AA, reacting, and adding water and a hexachloroplatinic acid solution to obtain the Cu2-xSe-Pt nano-material. The invention provides an application of a Cu < 2-x > Se (at) Pt nano material. The invention also provides a microneedle patch as well as a preparation method and application thereof. The invention provides a novel material for resisting multi-drug-resistant bacteria, which solves the problems that the existing single antibacterial strategy is limited and the expected curative effect cannot be achieved, also solves the problem of cytotoxicity of the existing nano enzyme, realizes deep drug delivery, ensures efficient local drug release and avoids systemic toxicity.

The invention belongs to the technical field of photocatalytic hydrogen evolution, and particularly relates to application of a g-C3N4 / Al-SrMoO4 heterojunction photocatalyst in hydrogen evolution through photocatalytic decomposition of water. The preparation method comprises the following steps: uniformly dispersing a g-C3N4 / Al-SrMoO4 heterojunction photocatalyst prepared by using a high-temperature molten salt method and a high-temperature calcination method in a mixed solution of simulated seawater, triethanolamine and chloroplatinic acid, continuously introducing argon into a reactor to obtain a relatively vacuum environment, and carrying out photocatalytic decomposition of water to produce hydrogen under the irradiation of simulated sunlight. The g-C3N4 / Al-SrMoO4 heterojunction photocatalyst disclosed by the invention has better stability and light absorption characteristic, can effectively reduce the recombination of photo-induced electrons and holes and improve the photocatalytic activity, is low in raw material cost, mild in reaction condition and environment-friendly and pollution-free, and conforms to the currently advocated green and environment-friendly concept.

The invention belongs to the technical field of precious metal electronic paste, and particularly relates to a preparation method and application of submicron spherical gold-platinum-palladium alloy powder used for being matched with low-temperature co-fired ceramics. The preparation method comprises the following steps: mixing a tetrachloroauric acid solution, a hexachloroplatinic acid solution and a tetrachloropalladium (II) acid solution to obtain a gold-platinum-palladium mixed solution; the gold-platinum-palladium mixed solution, the dispersing agent solution and the modified reducing agent solution are mixed for a second time, after a reduction reaction is conducted, static settlement and solid-liquid separation are conducted in sequence, obtained solids are washed and dried in sequence, and the obtained submicron spherical gold-platinum-palladium alloy powder used for being matched with the low-temperature co-fired ceramic has the advantages of being uniform in particle size, free of agglomeration, high in dispersity and the like. After low-temperature co-firing with a ceramic substrate, the substrate has the characteristics of flatness, no bubble, excellent weldability and soldering resistance, good batch stability and the like.

The invention discloses a method for determining the content of hydrogen ions in a chloroplatinic acid solution, and belongs to the technical field of analytical testing. In order to solve the problems that the chloroplatinic acid solution is yellow after being diluted and the manual titration end point is difficult to judge, a potentiometric titration method is adopted, and the end point is determined by measuring electrode potential mutation without depending on indicator color change. The method comprises the steps of test condition preparation, burette calibration, standard solution preparation and calibration, sample treatment and titration, result calculation and the like, a full-automatic potentiometric titrator is selected, the titration volume is controlled within the range of 10-15 mL, and a sodium hydroxide standard solution is used for sample titration after calibration. The relative standard deviation of the determination result is less than 0.5%, the adding standard recovery rate is between 96.3% and 103.1%, and the method has the characteristics of high analysis speed, high accuracy and good stability, is suitable for accurate detection of hydrogen ions in chloroplatinic acid production and quality inspection, and effectively solves the defects of the traditional method.

The invention discloses a modified graphene antistatic fiber and a preparation method thereof, and relates to the technical field of chemical fibers. When the modified graphene antistatic fiber is prepared, polyethylene glycol terephthalate, an ultraviolet absorption monomer and dimethyl (vinyl) silane react to prepare modified polyester; the preparation method comprises the following steps: polymerizing thiophene, hydantoin thiophene and 3-vinyl thiophene, and coating the phase change microcapsule with the polymerized thiophene, hydantoin thiophene and 3-vinyl thiophene to prepare a pre-modified phase change microcapsule; reacting the pre-modified phase change microcapsule with sodium hypochlorite to obtain a modified phase change microcapsule; the pre-modified graphene and 5-chloro-1-pentene are subjected to a reaction, and modified graphene is prepared; preparing a spinning solution from the modified polyester, the modified phase change microcapsules, the modified graphene, chloroplatinic acid and N, N-dimethylformamide, and performing wet spinning to obtain the modified graphene antistatic fiber. The modified graphene antistatic fiber prepared by the invention has excellent anti-aging, antibacterial, flame-retardant, antistatic, warm-keeping and mechanical properties.

The invention discloses a method for regulating and controlling the particle size of platinum alloy in a catalyst by using a surfactant compound, relates to a preparation method of a platinum alloy catalyst, and aims to solve the technical problem that the alloy is easy to agglomerate in the high-temperature sintering process of the existing platinum-based alloy catalyst. The method comprises the following steps: stirring and reacting polyvinylpyrrolidone and a surfactant at the temperature of 25-40 DEG C to obtain a compound solution; and adding a carbon carrier, chloroplatinic acid and transition metal salt into the compound solution, stirring, evaporating the solvent to dryness, and calcining to obtain the platinum-based alloy catalyst with regulated and controlled platinum alloy particle size. The particle size of the platinum alloy in the catalyst is 2.5-4.5 nm, the mass activity of the catalyst is 0.14-0.33 mA / [mu] gPt, the preparation method is simple, the cost is low, and batch production can be realized. The invention can be used in the field of proton exchange membrane fuel cells.

The invention relates to a platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material and preparation and application thereof, the carbon material takes a rod-like graded porous carbon nanomaterial as a carrier, and platinum-zinc alloy particles and zinc monatomic are jointly supported on the surface of the carrier; the preparation method comprises the following steps: S1, adding zinc acetate and hexadecyl trimethyl ammonium bromide into DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding into a polyacrylonitrile solution, and stirring; s2, performing electrostatic spinning on the obtained spinning precursor solution; s3, adding the obtained nanofiber into a zinc acetate dihydrate solution, then adding a dimethylimidazole solution, carrying out hydrothermal reaction, soaking the obtained product in a chloroplatinic acid methanol solution, and then carrying out freeze drying; and S4, heating carbonization is carried out under the protection of an inert atmosphere, then annealing and cooling are carried out, and the PtZn-Zn-N4-HPCNFs material is obtained. Compared with the prior art, the catalytic performance and the like in the reaction processes of oxygen reduction reaction (ORR), chlorine evolution reaction (CER) and the like can be effectively improved.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a high-dispersion platinum group noble metal-based catalyst, which comprises the following steps: preparing a porous rod-like cobaltosic oxide carrier material, cleaning with deionized water, drying, and roasting for 4-8 hours; dissolving chloroplatinic acid or platinum chloride in deionized water to form a noble metal solution; soaking the treated cobaltosic oxide carrier in a noble metal solution, taking out the carrier from the solution after soaking is completed, filtering, cleaning, drying, and roasting for 4-6 hours in an inert gas atmosphere; and keeping the temperature and reducing for 2-4 hours in a hydrogen atmosphere. When the porous rodlike cobaltosic oxide carrier material is prepared, firstly, a cobalt chloride solution is poured into the lower part of the double-layer cavity for stirring, a urea solution drips into the cavity through a spray head in the stirring process, a stirring barrel is turned over after stirring is completed, the stirred solution flows out and is filtered, the cobalt chloride solution and the urea solution are continuously added into the double-layer cavity for stirring and mixing, and the porous rodlike cobaltosic oxide carrier material is prepared. Therefore, the porous rod-like cobalt oxide solvent material is efficiently prepared.

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 fireproof flame-retardant spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the fireproof flame-retardant spinning yarn is prepared, benzyl benzoate is used as a core material, chitosan is used as a wall material, and pentenedialdehyde is used as a cross-linking agent to prepare an anti-mite microcapsule; carrying out condensation polymerization on ethylene glycol, a hydroxyl-terminated siloxane oligomer, the functionalized DOPO and dimethyl terephthalate to prepare functionalized polyester; the functional polyester and the anti-mite microcapsules are prepared into a spinning solution, and the polyester fiber is prepared through electrostatic spinning; reacting cotton fibers with maleic anhydride and o-phenylenediamine in sequence to obtain modified cotton fibers; polyester fibers and modified cotton fibers are blended in a spinning machine to prepare blended yarns, and the blended yarns are post-treated with chloroplatinic acid to prepare the fireproof flame-retardant spun yarns. The fireproof flame-retardant spinning yarn prepared by the invention has excellent anti-mite, flame-retardant and mechanical properties.

The invention discloses a bimetallic / molecular sieve composite catalyst and a preparation method thereof. The bimetallic / molecular sieve composite catalyst is characterized in that the loading content of a first metal platinum accounts for 1 wt% of the solid content of a molecular sieve, and the loading content of a second metal accounts for 0-1 wt% of the solid content of the molecular sieve. The preparation method of the bimetallic / molecular sieve composite catalyst comprises the following steps: firstly, co-dipping chloroplatinic acid, metal salt and a molecular sieve, and then drying and calcining a co-dipping solution to obtain the bimetallic / molecular sieve composite catalyst, wherein platinum is used as a first metal, the loading content of platinum is fixed to be 1 wt% of the solid content of the molecular sieve, the metal in the metal salt is used as a second metal, the loading content of the second metal is adjusted, and the bimetallic / molecular sieve composite catalyst with different loading contents of the second metal is obtained. According to the invention, the catalytic performance, the utilization rate and the water-resistant stability of Pt in catalytic oxidation of toluene are improved.

The invention belongs to the technical field of fiber felts, and particularly relates to a preparation method of a bamboo / wood / PP fiber felt for automotive interiors and a composite material of the bamboo / wood / PP fiber felt.The bamboo / wood / PP fiber felt is formed by opening, scattering, fully mixing and carding mixed fibers composed of wood fibers and modified bamboo fibers and PP fibers to form a fiber net, and then the fiber net is needled to form a dense felt material; wherein the modified bamboo fiber is prepared by the following steps: mixing 3, 5-di-tert-butyl-4-hydroxybenzaldehyde, methyl undecyl ketone, a sodium hydroxide solution and ethanol for reaction to obtain a hindered phenol material; mixing and reacting the hindered phenol material, chloroplatinic acid and tetrahydrofuran to obtain a long-chain alkyl hindered phenol grafted material; bamboo fibers, an ethanol solution and the long-chain alkyl hindered phenol grafting material are mixed and react, and modified bamboo fibers are obtained; the ultraviolet light stability of the bamboo / wood / PP fiber felt for the automotive trim is improved, and the tensile property of the bamboo / wood / PP fiber felt for the automotive trim can be greatly enhanced.

The present invention discloses a preparation method and application of a PtCu-TCP composite photocatalyst, which belongs to the field of photocatalysts. Hexahydrated chloroplatinic acid, trihydrated copper nitrate and a tris-olefin porous polymer (TCP) ethylene glycol dispersion are added to a two-necked flask and heated to 170-180°C for 4 hours. After the reaction is completed, the black precipitate is collected by centrifugation, washed and dried to obtain a PtCu-TCP composite photocatalyst. The preparation process of the composite photocatalyst is simple and the conditions are easy to control. According to structural characterization and performance characterization experiments, it can be found that the prepared PtCu-TCP composite photocatalyst has the advantages of stable chemical properties and high catalytic efficiency, and has high catalytic activity and stability in seawater; and because it has the advantages of easy availability of raw materials and low preparation cost, it has certain research and application value.

The invention provides high-permeability colorimetric hydrogel for detecting the content of glucose in sweat and a preparation method of the high-permeability colorimetric hydrogel, and relates to the technical field of wearable colorimetric sensing. The preparation method of the high-permeability colorimetric hydrogel comprises the following steps: mixing polyoxyethylene polyoxypropylene ether, chloroplatinic acid, chloroauric acid and water, and then adding L-ascorbic acid for reaction to obtain gold-platinum nanocrystalline dendrites; the preparation method comprises the following steps: mixing polyvinyl alcohol, 3, 3 ', 5, 5'-tetramethyl benzidine, gold-platinum nanocrystalline dendrites, ethylene glycol and water to obtain a hydrogel precursor solution, and curing the hydrogel precursor solution to obtain a hydrogel precursor; and soaking the hydrogel precursor in a sodium chloride solution to obtain the high-permeability colorimetric hydrogel for detecting the content of glucose in sweat. The gold-platinum nanocrystal dendrite nanoenzyme has tandem bio-enzyme activity, glucose oxidase activity and peroxidase double-enzyme activity, and TMB is used as a chromogenic substrate to prepare the hydrogel, so that colorimetric detection of glucose can be realized.

The invention provides a carbon-supported platinum-cobalt-copper multifunctional alloy catalyst and a preparation method and application thereof, and belongs to the technical field of energy materials. Wherein the nanocarbon carrier solution is mixed with a chloroplatinic acid solution, a cobalt chloride solution and a copper chloride solution, a sodium hydroxide aqueous solution is added to adjust the pH value, ultrasonic dispersion and stirring are performed to obtain turbid liquid, and the molar ratio of platinum ions to cobalt ions to copper ions is 2: (0.5-1): (0.5-1); then, putting the turbid liquid into a reaction kettle, and reacting at 120-250 DEG C for 1-6 hours to obtain a black colloidal solution; then filtering, washing and drying the black colloidal solution to obtain black powder; and finally, carrying out acid treatment on the black powder, and grinding to obtain the carbon-loaded platinum-cobalt-copper multifunctional alloy catalyst. The catalyst is used for catalyzing an oxygen reduction reaction of a cathode in a hydrogen fuel cell and / or a methanol fuel cell, and / or catalyzing a methanol oxidation reaction of an anode in a direct methanol fuel cell.

A preparation method of a platinum-boron aluminum catalyst for dehydrogenation of methylcyclohexane comprises the following steps: step 1, taking aluminum nitrate nonahydrate, adding CTAB (cetyltrimethyl ammonium bromide), and pouring absolute ethyl alcohol into a beaker A; adding boric acid and deionized water into a beaker B, and pouring the solution in the beaker B into the beaker A; slowly dropwise adding ammonia water into the beaker A, then adding absolute ethyl alcohol, and aging; evaporating the solution in the beaker A, drying in a drying oven, and finally putting in a muffle furnace; preparing a B-O-Al carrier with a large specific surface area; step 2, putting the B-O-Al carrier with the large specific surface area and absolute ethyl alcohol into a beaker, then adding a chloroplatinic acid solution, then putting the beaker into ultrasonic waves for oscillation, and then putting the beaker into a drying oven for drying to obtain a Pt / B-O-Al (unreduced) catalyst; and putting the Pt / B-O-Al (unreduced) catalyst into a tubular furnace, and reducing the Pt / B-O-Al (unreduced) catalyst under the condition of H2 to finally obtain the Pt / B-O-Al catalyst. The catalyst has the characteristics that the low-temperature requirement is low, the sintering inactivation resistance is high, and high-efficiency, long-life and stable dehydrogenation can be realized under the low Pt loading capacity (1wt%).

The invention relates to the technical field of glucose detection, in particular to a high-sensitivity glucose detection material and a preparation method thereof. The preparation raw materials of the high-sensitivity glucose detection material comprise the following components in parts by weight: 1-2 parts of modified glucose oxidase, 6-10 parts of modified porous microspheres, 1-1.5 parts of chloroplatinic acid and 0.6-1 part of palladium acetate. The prepared detection material is high in detection sensitivity and good in repeatability and stability.

The invention discloses a carbon-doped carbon nitride nanotube as well as a preparation method and application thereof in photocatalytic reaction, and belongs to the technical field of inorganic photocatalytic nano materials. Comprising the following steps: roasting urea, melamine and 2, 4, 6-triaminopyridine under protective gas; adding the carbon-doped carbon nitride nanotube, 5-hydroxymethylfurfural and chloroplatinic acid hexahydrate into the deionized water; photocatalytic hydrogen evolution is started to cooperate with selective oxidation reaction of 5-hydroxymethylfurfural. The carbon-doped carbon nitride prepared by the preparation method disclosed by the invention is in a nanotube shape; and the catalyst can be effectively applied to solar photocatalytic hydrogen evolution to cooperate with selective oxidation of 5-hydroxymethylfurfural to generate 2, 5-diformyl furan. The invention mainly solves the problems that the value-added reaction cooperated with the hydrogen production process cannot be realized and the overall economic value cannot be improved in the traditional hydrogen production means. The method is an effective, practical and simple method, is suitable for laboratory preparation and industrial production, and has huge development space and application prospect.

The present invention relates to the field of metal recovery, and discloses a method for recovering and separating nickel, platinum and iridium from scrapped spark plug electrodes. First, the scrapped spark plug electrodes are melt-cast into Ni-Pt-Ir alloy anode plates, and then electrolyzed to obtain cathode nickel and platinum-iridium anode mud; then aqua regia is used to dissolve the impurity metals and Pt in the platinum-iridium anode mud, and Ir powder and chloroplatinic acid solution are obtained by filtration; then ammonium chloride is added to the chloroplatinic acid solution, and ammonium chloroplatinate powder is obtained by precipitation and filtration; finally, ammonium chloroplatinate is calcined to obtain Pt powder. The present invention realizes efficient recovery and separation of Ni, Pt and Ir from scrapped spark plug electrodes, and has the advantages of short process, low material consumption, high metal recovery rate, high product purity, and easy industrialization, with Ni purity ≥99.0wt%, Pt and Ir purity ≥99.5wt%, and total metal recovery rate ≥98.0%.