61 results about "Potassium hexachloroplatinate" patented technology

Disclosed is a method for the production of a potassium platinochloride, which relates to a process for preparing a pharmaceutical intermediate potassium platinochloride. The method of preparation is characterized in that the preparation process adopts a spongy platinum as a material to prepare a chloroplatinic acid solution which is reacted with a potassium chloride solution to prepare the potassium chloroplatinite, then a hydrazine hydrochloride is adopted as a reducing agent to reduce the potassium chloroplatinite for preparing the pharmaceutical intermediate potassium platinochloride. The product adopting the method of the invention has a platinum content of 46.9+-0.2 percent and a potassium content of 19.0+-0.2 percent through a total elemental analysis. The total content of metallic impurity is no more than 0.08 percent.

A method of recycling tellurium from anode mud comprises the following steps: a) roasting; b) copper separation; c) gold separation; d) bismuth separation; and e) platinum and palladium separation: mixing bismuth separation residue in the step d) with sulfuric acid, controlling liquid-solid ratio to be 2:1-3:1 and the content of sulfuric acid in the liquid to be 190-210 g / L, stirring the mixture, and adding sodium chlorate to the bismuth separation residue until the bismuth separation residue is white after the bismuth separation residue is pulped, performing solid liquid separation to obtain a platinum and palladium separation residue and a platinum and palladium separation liquid, adding potassium chloride to the platinum and palladium separation liquid, controlling the content of the potassium chloride to be 45-55 g / L, and feeding chlorine to generate potassium chloroplatinate and potassium chloropalladite respectively from the platinum and palladium; and f) tellurium recovery: mixing the platinum and palladium separation residue in the step e) with water, controlling liquid-solid ratio to be 2:1-3:1, adding sodium hydroxide until the pH is 10-11, filtering the liquid, adding diluted sulfuric acid to a filtrate, controlling the pH to be 4.5-5.5 to generate tellurium dioxide, and reducing the tellurium dioxide to prepare tellurium. The method is simple and convenient, and is high in recovery rate and recovery purity of the tellurium.

The invention discloses a three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as a preparation method and application thereof. The nanometer material comprises at least one three-dimensional porous gold-solver-platinum ternary alloy nanometer ball; each three-dimensional porous gold-solver-platinum ternary alloy nanometer ball is a nanometer ball having an alloyframework which is of a continuous structure; and a plurality of nanometer pore passages in three-dimensional distribution are arranged among the alloy frameworks. The preparation method of the nanometer material comprises the following steps: mixing potassium chloroplatinate, ascorbic acid and a gold@silver nanometer cube colloidal solution and reacting to prepare a gold@silver-platinum nanometercube colloidal solution; afterwards mixing the gold@silver-platinum nanometer cube colloidal solution with deionized water and performing laser irradiation to prepare a gold-silver-platinum ternary alloy nanometer ball colloidal solution; and finally adding an etching agent to remove some silver elements to obtain the three-dimensional porous gold-solver-platinum ternary alloy nanometer material.The three-dimensional porous gold-solver-platinum ternary alloy nanometer material disclosed by the invention is uniform in size and good in monodispersity, has a relatively large specific surface area and lots of active sites, has excellent electro-catalytic activity and stability on methanol and can greatly shorten the reaction time in a preparation process; and a processing process is simple and easy to operate.

The invention discloses a preparation method of PtCu alloy nanospheres. The method comprises the following steps: (1) CuCl white powder is dissolved in saturated KCl solution to form colorless complexing liquid; (2) the colorless complexing liquid is filled in de-ionized water to separate out white substances; (3) the white substances are totally added in potassium chloroplatinate solution to obtain ash black solution; and (4) the ash black solution is stood to remove supernate, is added in KCl saturated solution for standing overnight, is cleaned by the de-ionized water for centrifugation, and is finally frozen and dried to prepare the PtCu alloy nanospheres. The method realizes controllable synthesis of PtCu alloy nanometer catalyst materials in a liquid phase under normal temperature and normal pressure, and obtains the PtCu alloy nanospheres with uniform size distribution; and the synthesis method is simple in process, easy to control, low in cost and high in repeatability.

The invention provides an industrialized production method of nano-gold antibacterial agent. The method comprises the following steps: (1) mixing a chloroauric acid solution with a solution containing aminopyrimidines and amino small molecules or a potassium chloroplatinate solution , obtain a mixed solution; (2) quickly add a solution of reducing agent to the mixed solution under stirring, and obtain the nano-gold antibacterial agent after fully reacting; wherein, the volume of the nano-gold antibacterial agent is more than 5L, It is preferably 5 to 100 L, and the addition time of the reducing agent is not more than 5 minutes, preferably not more than 1 minute, and more preferably 10 to 60 seconds. Also provided are the nano-gold antibacterial agent produced by the method, and the application of the method or the nano-gold antibacterial agent.

The invention relates to concave surface gold@silver platinum heterogeneous composite nanoparticles and a preparing method thereof. The method uses prefabricated gold nano-octahedrons as seeds, an ethylene glycol mixed solution containing the gold nano-octahedrons, potassium chloroplatinite, silver nitrate and ascorbic acid is heated in environmental atmosphere by adopting a seed growth method, such that silver and platinum are directionally deposited in six vertexes of the gold nano-octahedrons, and further the gold@silver platinum heterogeneous composite nanoparticles which are uniform in scale, adjustable in component and shaped like a concave surface are formed. The prepared gold@silver platinum heterogeneous composite nanoparticles have better dispersibility and stability in solutions such as water and ethylene glycol and are not agglomerated and deposited or deformed if being preserved at room temperature and environmental atmosphere for long term. The concave surface prepared gold@silver platinum heterogeneous composite nanoparticles obtained by the invention have excellent catalytic activity and optical absorption properties and are expected to have important application values in aspects of surface plasma optics, fuel cells, catalytic hydrogenation and the like.

The invention provides a nano enzyme with a nanometer cage core of a hollow gold-platinum alloy and a shell of a porous silicon dioxide, a preparation method and an application thereof, and belongs tothe field of nanometer materials. The preparation method comprises the following steps: etching a gold core platinum shell nanostructure through potassium hexachloroplatinate to obtain a nanocage ofhollow gold-platinum alloy; coating silicon dioxide on the surface of the nanocage through tetraethyl silicate; and obtaining the nano enzyme taking the nanometer cage, in a round rod shape, of the hollow gold-platinum alloy as a core, and a silicon dioxide shell as the periphery of the core. The length of the core is 80 to 100 nm, and the diameter is 20 to 25 nm. The shell is provided with a channel of 3 to 5 nm. The nano enzyme is negatively charged. The antigen can be bound by an attractive effect of positive and negative electric charges to form a nano enzyme label antigen complex, which is used for performing enzyme linked immunoassay. According to the nano enzyme with the nanometer cage core of the hollow gold-platinum alloy and the shell of the porous silicon dioxide, the preparation method and the application thereof, the cost of a reagent of the natural enzyme label antigen complex is reduced, the working environment of enzyme linked immunodetection is extended, the defects that the natural enzyme is easy to deactivate and denature, etc., are overcame, and the nano enzyme can be widely applied to various enzyme linked immunodetection.

The invention relates to a joint preparation method of potassium chloroplatinite and potassium chloroplatinate. The joint preparation method comprises the steps of: completely dissolving metal platinum which is taken as a raw material by aqua regia, and adding hydrochloric acid to remove nitrogen compound to obtain chloroplatinic acid solution; neutralizing the chloroplatinic acid solution by using potassium hydroxide solution until the pH value is 5.5-7.5; adding potassium oxalate for reducing to obtain the potassium chloroplatinite; and separating out crystal, and adding hydrogen peroxide into the rest mother liquor to obtain the potassium chloroplatinate. The joint preparation method can be used for preparing two products by charging for once, is simple in technology and short in process flow, does not generate platinum-containing mother liquor, and is high in platinum utilization rate and good in product quality. The potassium chloroplatinite and the potassium chloroplatinate prepared by the invention are mainly used for manufacturing catalysts, chemically analyzing, preparing platinum-containing complexes and platinum-containing metallorganic compounds and the like, and are widely applied to industries such as military industry, electronic industry, medical industry, etc.

The invention relates to a preparation method of potassium chloroplatinite. The preparation method mainly comprises the following steps of: dissolving platinum with aqua regia; removing nitre and acid; adding potassium chloride; filtering to obtain potassium chloroplatinate precipitate; adding reductant solution; jointly processing by utilizing 200mW / cm<2> cosine ultrasonic wave under 20 to 25kHz and 200mW / cm<2> variable frequency ultrasonic wave under 35 to 40kHz, and continuously stirring at the same time, thus obtaining potassium chloroplatinite solution. According to the preparation method of the potassium chloroplatinite, the specific ultrasonic cavitation effect is utilized to promote the reaction process of reducing potassium chloroplatinate through potassium formate, thus the reaction time is shortened, the reaction is complete, and the yield of potassium chloroplatinite is increased.

The invention discloses a tetravalent platinum complex oxidant and a preparation method and application thereof in synthesizing of disulfide bonds in a polypeptide molecule. The tetravalent platinum complex oxidant has a structure shown in the formula (I), wherein n is 0 or 2; X is halide ion with -1 valence. The preparation method of the tetravalent platinum complex oxidant comprises the following steps of enabling potassium chloroplatinite and ethylenediamine dihydrochloride to react, so as to obtain dichloro(ethylenediamine)platinum; enabling the dichloro(ethylenediamine)platinum and a heteroaromatic ring containing two nitrogen atoms to react, so as to obtain an ion type bivalent platinum complex; enabling the ion type bivalent platinum complex and a hydrochloric acid solution containing hydrogen peroxide to oxidize, so as to obtain the tetravalent platinum complex oxidant. The tetravalent platinum complex oxidant has the advantages that the residual radicals of methionine are not oxidized, the reaction yield rate is high, the reaction rate in the stronger acid reaction medium is quick, and the cost for synthesizing the disulfide bonds in a pharmaceutical molecule by using the oxidant is greatly reduced.

The invention discloses a method for preparing a PtO2 conical nano granular material. The method comprises the following steps: preparing a potassium chloroplatinate diluted solution, putting the potassium chloroplatinate diluted solution into a metallic tube, sealing the metallic tube, putting the metallic tube into a hydrothermal reaction kettle, sealing the hydrothermal reaction kettle, and carrying out a self hydrolysis reaction under conditions of a set temperature and pressure, so as to obtain the PtO2 conical nano granular material, wherein the temperature is 200-600 DEG C, the pressureis 100-200Mpa, and the self hydrolysis reaction time is 1-48 hours. The method is easy in raw material obtaining, low in cost, precise and efficient in experiment process and low in energy consumption, and PtO2 conical nano granules prepared by using the method have particle sizes from tens to hundreds of nanometers, have irregular conical structures, and have complete crystal forms.

The invention relates to a synthesis method of azepine anthraquinone. The azepine anthraquinone is obtained by carrying out intramolecular 6-endo-dig cycloisomerisation reaction shown as in formula (1) on N-propargyl quinine with a 1,5-eneyne structure under the action of a metal catalyst, and purifying, wherein the intramolecular 6-endo-dig cycloisomerisation reaction is homogeneous phase metal catalytic reaction, the metal catalyst is gold salt, platinum salt or univalent gold complex; and the use level of the metal catalyst is 0.01-0.5 equivalent weight of the N--propargyl quinine. The gold slat is auri chloridum (AuCl3) or aurous chloride (AuCl); the platinum salt is platinum tetrachloride, platinum bichloride or potassium chloroplatinate; and the univalent gold complex is PPh3AuOTf, PPh3AuSbF6, PPh3AuNTf2 or LAuNTf2, wherein L is nitrogen heterocyclic ring carbene ligand. The invention realizes the synthesis of the azepine anthraquinone by utilizing metal catalytic intramolecular eneyne cyclization reaction, and has the advantages of simple and easy-accessible raw materials and moderate reaction conditions.

The invention discloses a platinum electroplating liquid of potassium platinum (IV) chloride and an electroplating method of the platinum electroplating liquid. Each liter of the platinum electroplating liquid comprises the following materials: potassium platinum (IV) chloride containing 0.6 to 1 g of platinum, water-soluble phosphate containing 100 to 140 g of phosphate radicals, 4-8 mg of hexadecyl trimethyl ammonium chloride, and hydrochloric acid capable of adjusting the pH value of the electroplating liquid to be 1 to 2. As potassium platinum (IV) chloride is taken as a main platinum salt, phosphate is taken as a brightening agent salt, hexadecyl trimethyl ammonium chloride is taken as an additive, and platinum hydrochloric acid is used for adjusting the pH of the electroplating liquid to be acid, the platinum electroplating liquid is relatively high in dispersancy and deep plating capability, high in cathode current efficiency, and excellent in performance. A plating obtained through electroplating of the platinum electroplating liquid under an alkali condition is low in porosity, high in lightness, and favorable in plating quality.

The invention discloses a platinum complex and a preparation method and application thereof, and relates to the technical field of chemical analysis and detection. The preparation method of the platinum complex comprises the steps: using potassium tetrachloroplatinate as a raw material, and performing compound coordination on potassium tetrachloroplatinate with 2-phenylpyridine and 1,10-phenanthroline so as to obtain the platinum complex which is labeled as Pt-LZU. The invention provides a probe for detecting perchlorate ions in an aqueous solution, and the probe comprises the platinum complex. The invention also provides the application of the platinum complex in detection of perchlorate ions in an aqueous solution. Through the platinum complex probe Pt-LZU which is designed and synthesized, the perchlorate ions in the aqueous phase can be recognized with single selectivity and high sensitivity, and furthermore, the platinum complex probe Pt-LZU which is designed and synthesized by using the method has a simple structure, a simple synthesis method and a good application prospect in detection of the perchlorate ions; and the platinum complex has a chemical structure as follows.

The invention belongs to the field of precious metal metallurgy, and particularly relates to a method for preparing trichloromonoammine potassium platinate through an ultrasonic method. The preparation method comprises the following steps: carrying out ball milling on potassium chloroplatinite, soaking with a proper amount of HCl, filtering, and dissolving pretreated potassium chloroplatinite in water for later use; placing the obtained potassium chloroplatinite aqueous solution in an ultrasonic field to be oscillated, heating during oscillation, adding an ammonium acetate aqueous solution, increasing the temperature of the system, and performing continuous oscillation continues for 20-30 min; filtering to obtain directly recovered potassium trichloroplatinate, and reserving the filtrate for later use; adding Pt (NH3) 4Cl2 into the filtrate to generate a [Pt (NH3) 4][PtCl4] precipitate, filtering and drying the [Pt(NH3)4][PtCl4] precipitate; drying, mixing with potassium chloroplatinite, grinding to green, dissolving in cold water, and grinding. According to the preparation method provided by the invention, the potassium chloroplatinate is subjected to particle size refining and acidification pretreatment, and the whole reaction system is synthesized in an ultrasonic field, so that the direct yield, the total yield and the content of the potassium trichloroplatinate are improved, and the preparation method is suitable for industrial production.

Disclosed is a preparation method of a silicon negative electrode material of a lithium ion battery. The preparation method comprises the following steps of (1) putting cleaned silicon powder into a mixed solution of metal salt and HF to be subjected to deposition treatment; and (2) finally, performing oxidization treatment on the surface metal modified silicon powder to form an oxide layer on thesurfaces, not covered with metal particles, of the silicon particles, wherein metal salt is silver nitrate, gold potassium chloride, potassium hexachloroplatinate or copper nitrate. By virtue of thepreparation method, conductivity of silicon powder can be improved, the combination strength between silicon particles and a binder can be reinforced, and the cycle performance of the silicon negativeelectrode material can be greatly improved; and in addition, the preparation method is simple in process, low in cost, very suitable for large-scale industrial production and expected to accelerate development of the silicon-based negative electrode material of the lithium ion battery.

The invention provides a method for preparing a platinum-graphene-molybdenum sulfide composite material by low-temperature plasma. The method comprises the following steps: potassium chloroplatinate with the concentration of 24.09 mmol / L is mixed with a molybdenum sulfide solution and a graphene oxide solution with the same concentration according to a volume ratio of 1:5:5 to obtain a mixed solution; the mixed solution is subjected to ultrasonic treatment for 20-40 min to obtain a dispersion; the dispersion is centrifuged and separated, and a precipitate compound obtained by separation is freeze-dried; and the above obtained powder is subjected to low-temperature plasma discharge in a hydrogen atmosphere to obtain the platinum-graphene-molybdenum sulfide compound. Compared with the priorart, the method of the invention has the advantages of simplicity, low condition requirements, suitableness for large-scale production, benefit increase and cost reduction.

The present invention provides a platinum-palladium-gold nanometer mesoporous electrocatalyst and a preparation method thereof. A potassium chloroplatinate, a sodium chloropalladate and a chloroauricacid solution with concentrations of 5-40 mM, a hydrochloric acid with a concentration of 1-10 mM, and an ascorbic acid solution with a concentration of 0.02-0.5 mM are prepared; the solution of the potassium chloroplatinate, the sodium chloropalladate and the chloroauric acid with the total volume of 4 mL are mixed, the hydrochloric acid with 10-200 [Mu]L is added, and F127 between 10-100mg is added for complete dissolution by ultrasound; and finally, the ascorbic acid solution with 1-5mL is added to uniformly mix with the solution and put the solution into an ultrasonic washing unit for heating to a temperature in a range of 20-60 DEG C, after reaction for 1-6 hours, the solution is washed by pure water, and products are collected by centrifugation and dried to obtain a platinum-palladium-gold nanometer mesoporous electrocatalyst. The reaction time is short, the electrocatalytic methanol oxidation reaction performance is excellent.

The invention discloses a preparation method of a gold-platinum-silver material with an asymmetric structure. The preparation method mainly comprises the following steps of firstly, growing a gold nanorod by using a seed growth method, then cleaning the successfully grown gold nanorod to obtain a gold nanorod with higher purity, then taking the gold nanorod as a seed, adding a corresponding amount of surfactant and potassium tetrachloroplatinate, uniformly mixing, and controlling the reaction temperature, so that platinum successfully grows on the two ends of the gold nanorod, then cleaning a gold-platinum structure to obtain gold-platinum with higher purity, taking the gold-platinum as a new seed, adding a corresponding amount of the surfactant, silver nitrate and ascorbic acid solution, controlling the reaction temperature to finally obtain the asymmetric growth gold-platinum-silver material, and observing the growth condition through a transmission electron microscope. The gold-platinum-silver material with the asymmetric structure synthesized by the preparation method is uniform in growth; the preparation method has simple reaction conditions, high reaction rate and low cost.

The invention provides a preparation method for a composite photothermal material. The method comprises the following steps: adding potassium hexachloroplatinate solution to G4.5-COONa solution (pH=2), regulating a pH value to be 9.16, after reacting for 12 h in a dark place, adding sodium borohydride solution, after the reaction, dialyzing in a dialysis bag of which a cut-off molecular weight is3500 Da, to obtain the composite photothermal material (DEPt-COOH). A polyamide-amine tree-form macromolecule of which an end group is a carboxyl is used as a carrier, and metal nano photothermal particles are coated in the interior to synthesize a novel compound (DEPt-COOH) which is used for a therapy research of bone tumor. In the multi-functional compound, a poly carboxyl terminal is efficiently chelated with the surface of a corrosion bone so as to realize efficient targeted delivery of the composite material in a bone tumor focal area. Efficient killing to the bone tumor is realized through photothermal therapy, and side effects to a normal tissue are greatly reduced.

The invention relates to a fuel cell catalyst technology, and aims to provide preparation and application of a monatomic platinum catalyst based on a platinum coordination cyclodextrin inclusion compound. The preparation method comprises the following steps of: dissolving [beta]-cyclodextrin in deionized water, then mixing the [beta]-cyclodextrin with a melamine solution, and performing dispersing; performing vacuum drying to obtain a melamine cyclodextrin inclusion compound; taking the melamine cyclodextrin inclusion compound, adding the melamine cyclodextrin inclusion compound into the potassium chloroplatinate solution, and performing stirring to obtain a platinum coordination melamine cyclodextrin inclusion compound solution; then adding sodium metaborate tetrahydrate, and after the sodium metaborate tetrahydrate is completely dissolved, carrying out spray drying to obtain a precursor; carbonizing the precursor under the protection of a nitrogen atmosphere; and performing cooling,washing and drying to obtain a monatomic platinum catalyst. The preparation and application of a monatomic platinum catalyst based on a platinum coordination cyclodextrin inclusion compound are simplein technical route, have universality, and can avoid generation of impure phases. Platinum atoms are fixed by utilizing the strong coordination effect of nitrogen to form a monatomic catalyst, so that the monatomic catalyst has the higher electrocatalytic activity, and the cost of the fuel cell catalyst can be effectively reduced.

The invention relates to a preparation method of potassium chloroplatinite. The preparation method mainly comprises the following steps of: dissolving platinum with aqua regia; removing nitre and acid; adding potassium chloride; filtering to obtain potassium chloroplatinate precipitate; adding reductant solution; jointly processing by utilizing 200mW / cm<2> cosine ultrasonic wave under 20 to 25kHz and 200mW / cm<2> variable frequency ultrasonic wave under 35 to 40kHz, and continuously stirring at the same time, thus obtaining potassium chloroplatinite solution. According to the preparation method of the potassium chloroplatinite, the specific ultrasonic cavitation effect is utilized to promote the reaction process of reducing potassium chloroplatinate through potassium formate, thus the reaction time is shortened, the reaction is complete, and the yield of potassium chloroplatinite is increased.

The invention discloses a methanol oxidation electrocatalyst with a palladium-platinum yolk-eggshell structure and a preparation method. The preparation method comprises the following steps: reducingsodium chloropalladate with ascorbic acid to prepare palladium nanoparticles; preparing a palladium-silicon dioxide precursor; carrying out amination treatment on the palladium-silicon dioxide precursor by using 3-aminopropyltrimethoxysilane; weighing 1-6mg of 3-palladium-silicon dioxide nanoparticles and dissolving the 3-palladium-silicon dioxide nanoparticles into a mixed solution of potassium chloroplatinate and chloroauric acid, wherein the total volume of the mixed solution is 2mL; adding 10-50mg of F127, mixing, then adding 1-6mL of ascorbic acid solution, carrying out ultrasonic reaction for 1-5 hours at 20-50 DEG C, washing and centrifuging after the reaction is finished to obtain nanoparticles with a palladium-silicon dioxide-mesoporous platinum three-layer structure, and etchingsilicon dioxide from the product by using 10-50mL of hydrofluoric acid solution; washing and centrifuging to obtain a final product. The preparation process is flexible, the reaction conditions are mild, and the prepared material has excellent electro-catalytic methanol oxidation performance.

The invention discloses a preparation method of a nanogold-platinum composite material in mesoporous silica. The preparation method comprises the following steps of firstly, preparing a gold nanorod raw material, re-dispersing and adding the gold nanorod raw material to a tetraethoxysilane (TEOS) solution according to a certain mode, growing mesoporous silica on the surface of a gold nanorod, then heating the mesoporous silica coated gold nanorod in an oil bath at 60 DEG C, starting a corrosion process by adding a corresponding amount of hydrochloric acid, then adding a large amount of cold methanol to finish corrosion, centrifuging a product, dispersing obtained precipitate in an aqueous solution, and finally, adding a corresponding amount of potassium tetrachloroplatinate solution, adding a corresponding amount of ascorbic acid solution, stirring for 1 minute, uniformly mixing, and standing for 2 hours to obtain a final product. The nanogold-platinum composite material in the mesoporous silica prepared by the preparation method grows uniformly; the preparation method has the advantages of simple reaction conditions, high reaction rate and low cost.

The invention belongs to the technical field of platinum compound preparation, and relates to a method for preparing spherical dinitroso diammineplatinum through a hydrothermal method and application. The method comprises the following steps: 1) preparing a potassium chloroplatinate precipitate from chloroplatinic acid and potassium chloride; 2) dissolving the potassium chloroplatinate precipitate in water, heating in an oil bath, dropwise adding a sodium nitrite solution, and stirring for 2 hours to obtain a yellow green transparent solution; 3) dropwise adding ammonia water into the yellow green transparent solution at 70-80 DEG C, and stirring to obtain yoghourt-like solid; and 4) transferring the yoghourt-like solid into a hydrothermal reaction kettle for reaction, cooling the reaction kettle, taking precipitate and washing for multiple times, and freeze-drying to obtain yellowish powder, namely the spherical dinitroso diammineplatinum. The method has the characteristics of uniform phase, high purity, good crystallization and high yield, the spherical P salt with controllable morphology is prepared, the spherical P salt can be used for cyanide-free electroplating, and the electroplating quality is ensured.

The invention provides a catalyst carrier applied to a direct methanol fuel cell, and also provides an electrochemical sensor applied to the direct methanol fuel cell. A cleaned substrate electrode isput into the catalyst carrier prepared by using the method to carry out electro-deposition, and then is put into a potassium hexachloroplatinate aqueous solution to carry out electro-deposition to obtain a final product. According to the method disclosed by the invention, graphene oxide and polyethyleneimine are doped to form an intercalated composite material so as to obtain the catalyst carrier, and the catalyst carrier is deposited on the surface of a glass carbon electrode, a catalyst platinum is subjected to electro-deposition to obtain the electrochemical sensor; catalytic oxidation reaction on methanol is carried out by adopting a tri-electrode system, and thus, the catalysis effect is obvious. The methanol solutions with different concentrations are detected by using the electrode, a result shows that the catalytic oxidation peak height and the concentration of the methanol appear a linear reaction, and the linearity is good when the concentration of the methanol is between 0.02M and 2.0M, and R2 is equal to 0.996. The catalyst carrier can be used as the electrochemical sensor for detecting the methanol in the solution.

The invention relates to a novel method for preparing picoplatin. The technical scheme adopts following steps of: firstly generating potassium tetraiodoplatinate by reacting potassium tetrachloro platinum with potassium iodide to improve the activity of reactants; generating triiodo (2-picoline) platinum (II) potassium by reacting the potassium tetraiodoplatinate with 2- picoline; generating Cis-2 iodine-ammonia and (2-picoline) platinum (II) by reacting triiodo (2-picoline) platinum (II) potassium with ammonia water; adding the Cis-2 iodine-ammonia and the (2-picoline) platinum (II) together to deionized water; stirring the deionized water for reaction at the room temperature; filtering silver iodide precipitate when the reaction is completed; and adding potassium chloride so as to gradually separate out crystallized products of the picoplatin. In the invention, the reaction is more complete, the utilization of the platinum and the yield are enhanced, the products do not have silver irons, and the problem that the silver irons are exceeded needs not to be worried.

The invention discloses a preparation method for potassium chloroplatinite. The preparation method comprises the following steps: 1) dissolving spongy platinum in aqua regia for denitration, thereby acquiring a chloroplatinic acid solution; 2) dropwise adding the chloroplatinic acid solution into a potassium chloride solution and reacting; 3) washing the potassium chloride solution with ethyl alcohol, and then drying, thereby acquiring potassium chloroplatinate; 4) uniformly mixing deionized water and potassium chloroplatinate, thereby forming a turbid liquid; dropwise adding hydroxylamine hydrochloride solution and potassium hydroxide solution in turn; removing platinum black by filtering under a heat state after the ending of reaction, thereby acquiring the potassium chloroplatinite solution; 5) performing rotary evaporation on the potassium chloroplatinite solution, and then cooling and filtering, and vacuum-drying, thereby acquiring solid potassium chloroplatinite. According to theinvention, hydroxylamine hydrochloride is used as a reducing agent for reducing potassium chloroplatinate, potassium hydroxide is used for neutralizing excessive acid in the system, and potassium chloroplatinate is completely reduced to potassium chloroplatinite, so that high-purity potassium chloroplatinite is prepared. The quality purity of the prepared potassium chloroplatinite is more than orequal to 99.5%, potassium chloroplatinate residue is less than or equal to 0.04% and yield is above 92.2%.

The invention relates to a joint preparation method of potassium chloroplatinite and potassium chloroplatinate. The joint preparation method comprises the steps of: completely dissolving metal platinum which is taken as a raw material by aqua regia, and adding hydrochloric acid to remove nitrogen compound to obtain chloroplatinic acid solution; neutralizing the chloroplatinic acid solution by using potassium hydroxide solution until the pH value is 5.5-7.5; adding potassium oxalate for reducing to obtain the potassium chloroplatinite; and separating out crystal, and adding hydrogen peroxide into the rest mother liquor to obtain the potassium chloroplatinate. The joint preparation method can be used for preparing two products by charging for once, is simple in technology and short in process flow, does not generate platinum-containing mother liquor, and is high in platinum utilization rate and good in product quality. The potassium chloroplatinite and the potassium chloroplatinate prepared by the invention are mainly used for manufacturing catalysts, chemically analyzing, preparing platinum-containing complexes and platinum-containing metallorganic compounds and the like, and are widely applied to industries such as military industry, electronic industry, medical industry, etc.