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55 results about "Platinum nanoparticles" patented technology
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Platinum nanoparticles are usually in the form of a suspension or colloid of nanoparticles of platinum in a fluid, usually water. A colloid is technically defined as a stable dispersion of particles in a fluid medium (liquid or gas).
Preparation method and application of ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst
InactiveCN102078826AImprove conductivityAvoid reunionCatalyst carriersCell electrodesElectrochemical responseModified carbon
The invention discloses a preparation method of an ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst, and application of the catalyst to methanol electrocatalysis reaction. The method comprises the following steps of: synthesizing carbon spheres and ionic liquid; modifying the carbon spheres by using the ionic liquid; and performing anion exchange on a platinum precursor and the ionic liquid, and reducing platinum on the surfaces of the ionic liquid modified carbon spheres to obtain the ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst. A catalyst modified glassy carbon electrode is taken as a working electrode, and electrochemical reaction is performed in electrolyte solution of sulfuric acid / methanol. The method can effectively prevent platinum nanoparticles from being agglomerated; and due to the introduction of the ionic liquid, the conductivity of the carbon spheres is further improved, specific surface area is increased, capability of resisting carbon monoxide poisoning can be improved, and the performance of a catalyst carrier is optimized.
Owner:SUZHOU FANGSHENG OPTOELECTRONICS CO LTD
Methanol resistant cathodic catalyst for direct methanol fuel cells
InactiveUS20060088741A1Suppression of methanol oxidationHigh activityOrganic-compounds/hydrides/coordination-complexes catalystsActive material electrodesOxygenPt element
Methanol-tolerant cathodic catalysts were prepared by depositing platinum nanoparticles and iron macrocycles on a carbon substrate. The order of depositing the iron and platinum on the carbon substrate were varied to form a (Fe—Pt) / C catalyst and a (Pt—Fe) / C catalyst. Different sintering temperatures were investigated to determine the heating effect on methanol tolerance. Oxygen reduction with and without the presence of methanol on these new catalysts was evaluated by using a rotating disk electrode system.
Owner:PACIFIC FUEL CELL CORP
Preparation and application method of titanium dioxide loaded highly dispersed platinum composite photocatalytic material
InactiveCN106238043APromote degradationGood dispersionWater/sewage treatment by irradiationWater contaminantsDispersityOrganic dye
The invention discloses a preparation and application method of a titanium dioxide loaded highly dispersed platinum composite photocatalytic material, and belongs to the field of titanium dioxide photocatalysis. The preparation method comprises following steps: tetrabutyl titanate and hydrofluoric acid are stirred to be uniform at room temperature, an obtained mixture is reacted for 15 to 24h at 150 to 220 DEG C in a hydrothermal reaction kettle, and titanium dioxide nanosheets are obtained via separation, washing, and drying; the titanium dioxide nanosheets are dispersed in absolute ethanediol uniformly, and is subjected to reflux condensation stirring for 10 to 60min at 80 to 150 DEG C, polyvinylpyrrolidone and chloroplatinic acid are added, an obtained mixed material is subjected to reflux condensation stirring for 3 to 10h at 80 to 150 DEG C, and the titanium dioxide nanosheet loaded platinum nanoparticle composite material is obtained via separation, washing, and drying. The preparation method is capable of obtaining titanium dioxide nanosheets with a morphology easy to control; ethanediol is taken as a reducing agent, and 2 to 3nm platinum quantum dots with uniform particle size and high dispersity are obtained; the preparation parameters are easy to control; and repeatability is high. The titanium dioxide loaded highly dispersed platinum composite photocatalytic material is especially suitable to be used for catalytic degradation organic dyes under ultraviolet irradiation, and relatively high degradation rate is achieved.
Owner:UNIV OF SCI & TECH BEIJING
Platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, preparation method and application thereof
The invention discloses a platinum-loaded nitrogen phosphorus co-doped carbon material hydrogen evolution catalyst, a preparation method and an application thereof. The catalyst comprises a nitrogen phosphorus co-doped carbon material used as the substrate and platinum nanoparticles uniformly loaded on the substrate; the platinum nanoparticles are 0.8-3nm in average dimensions; the preparation method comprises the steps of performing high-temperature calcining on a nitrogen-containing polymer which is formed mainly by a reaction between a phosphorus-containing precursor and a nitrogen-containing polymer monomer in protective atmosphere to obtain the nitrogen phosphorus co-doped carbon material; and performing uniform mixing on the carbon material and a platinum source in a solvent, and then adding a reducing agent to prepare the catalyst. The preparation method disclosed in the invention is easy to operate, simple and reliable, and low in cost; and the prepared catalyst has very excellent electrocatalytic activity and stability, and huge application prospect in the field of electrochemical hydrogen evolution field.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Preparation method for loading platinum nanoparticles on carbon carrier
InactiveCN1698962AFine and uniform particle sizeImprove efficiencyCatalyst activation/preparationMetal/metal-oxides/metal-hydroxide catalystsAlcoholPolyol
This invention discloses a method for loading platinum metal nanometer particles in the carbon carrier surface, which comprises the following steps: a) scattering carbon carrier on the polyatomic alcohol liquid with platinum metal salt and acetate; b) heating to 160-180 Deg.c, stirring and refluxing 2-3 hours; wherein each liter liquid has 1.2-15 g carbon carrier, 0.01-0.04 mole metal salt, 0-0.01 mole acetate. The loading quantity of platinum metal nanometer particles in the carbon carrier surface is 2%-40%. The particles have fine and even grain size, and the average size is about 3.0nm; besides, the method does not need any surface activator or polyaromatics protecting agent.
Owner:ZHEJIANG UNIV
Paper chip colorimetric analysis system for mercury ion detection and construction method and application thereof
InactiveCN105973879APortableEasy to monitorMaterial analysis by observing effect on chemical indicatorPlatinum nanoparticlesEngineering
The invention belongs to the technical field of mercury ion detection, and in particular, relates to a paper chip colorimetric analysis system for mercury ion detection and a construction method and an application thereof. The construction of the paper chip colorimetric analysis system includes the steps of preparation of a paper chip plastic bearing substrate, and design and preparation of the paper chip; the paper chip is similar to a micro reaction vessel and is used for platinum nanoparticle catalysis of a TMB / H2O2 developing reaction; the construction of a simple optical fiber analysis device is used for representation of the intensity of a color in the paper chip in a numerical value form. A principle comprises that platinum nanoparticles have excellent activity similar to catalase and can rapidly catalyze a TMB / H2O2 substrate to generate a blue precipitate, while when mercury ions exist, PtNPs can quickly undergo a reaction with the mercury ions to inhibit self enzyme activity, and finally, the recognition and quantitation of the mercury ions in the solution are achieved through changes of the color after the reaction. The system has the advantages of excellent specificity and selectivity, and has wide application prospect.
Owner:FUDAN UNIV +2
Electrochemical gas sensing device adopting precious metal and graphene composite material as sensing electrode and production method of electrochemical gas sensing device
InactiveCN104483365AMaterial electrochemical variablesElectrochemical gas sensorPlatinum nanoparticles
The invention relates to an electrochemical gas sensing device adopting a precious metal and graphene composite material as a sensing electrode and a production method of the electrochemical gas sensing device. The production method comprises the following steps: (1) preparing graphene oxide; (2) preparing a platinum metal nano particle and graphene composite material; (3) producing the sensing electrode in an electrochemical sensor: producing the gas sensor by adopting the platinum metal nano particle and graphene composite material as the sensing electrode of the electrochemical gas sensor. The gas sensor can detect various gases such as hydrogen and carbon oxide.
Owner:JIANGXI NORMAL UNIVERSITY
Preparation for platinum/attapulgite catalyst and application thereof
InactiveCN101716505AFine and uniform particle sizeLow priceMetal/metal-oxides/metal-hydroxide catalystsPreparation by oxygen reductionPlatinum saltsPotassium borohydride
The invention discloses a platinum / attapulgite catalyst and a preparation method thereof. The carrier of the catalyst is the attapulgite clay; the active component of the catalyst is platinum nanoparticles of which the average particle size is 3 to 5 nm; the mass fraction of the platinum in the catalyst is 0.5 to 5 percent; and the residual component of the catalyst is the attapulgite clay. The preparation method comprises the following steps of: modifying the surface of the attapulgite clay with acid; adding a certain amount of modified attapulgite clay into aqueous solution of platinum salt; adjusting the pH value of the aqueous solution with sodium hydrate; adding aqueous solution of potassium borohydride or hydrazine hydrate dropwise in the aqueous solution under the action of magnetically stirring; filtering, washing and drying the mixed aqueous solution to obtain the platinum / attapulgite catalyst. The platinum / attapulgite catalyst prepared by the method of the invention is high in catalytic activity and selectivity for hydrogenation preparation of cinnamyl alcohol through cinnamaldehyde.
Owner:赵杰 +2
Reduced graphene oxide/porphyrin/platinum nano composite material and preparation and application thereof
ActiveCN106955739AImprove photocatalytic performanceDoes not constitute pollutionMaterial nanotechnologyOrganic-compounds/hydrides/coordination-complexes catalystsPlatinum nanoparticlesDehydrogenation
The invention discloses a reduced graphene oxide / porphyrin / platinum nano composite material and a preparation and application thereof and belongs to the technical field of photocatalysis. Reduced graphene oxide with good electric conductivity is adopted as a molecule of an anchor group, a reduced graphene oxide film is modified by adopting rodlike 5,10,15,20-tetra(4-carboxyphenyl) porphyrin with optimal photocatalytic performance in porphyrin, and platinum nanoparticles as an optimal catalytic dehydrogenation material are finally loaded on the modified reduced graphene oxide film. The prepared ITO-RGO-TCPP NR-PtNPs nano composite material has good photocatalytic performance and can be used as a catalyst in the photocatalytic hydrogen production capacity process; the whole method is short in technological process, simple in experiment condition, low in cost and free of pollution to environment; and the requirements of clean production are met.
Owner:SHENZHEN MATHENTECH INTELLIGENT TECH
Carbon nanotubes-supported nitrogen doped graphene-coated platinum nanometer compound material and preparation method and application thereof
InactiveCN109046330AImprove conversion rateImprove stabilityHydrocarbon by hydrogenationChemical recyclingBenzenePlatinum nanoparticles
The invention discloses a carbon nanotubes-supported nitrogen doped graphene-covering platinum nanometer compound material and a preparation method and application thereof, and belongs to the technical field of phenylacetylene selective hydrogenation reaction catalysts. A wet chemical reduction method is adopted for directly loading platinum nanoparticles onto carbon nanotubes subjected to acid treatment, a CVD method is used, nitrogen-doped graphene layers coat the surfaces of the platinum nanoparticles, and the number of the nitrogen-doped graphene layers is 2-7. Through the CVD method, thecarbon nanotubes-supported nitrogen doped graphene-coated platinum nanometer compound material is prepared, compared with traditional carbon nanotubes-supported Pt catalysts, a carbon nanotubes-supported nitrogen doped graphene-coated platinum nanoparticle catalyst can effectively catalyze conversion of phenylacetylene into styrene, and the hydrogenation selectivity and a conversion rate of the phenylacetylene are obviously improved; in the reaction process, inactivation is not prone to happen, and the cycling stability is good, wherein the carbon nanotubes-supported nitrogen doped graphene-covering platinum nanoparticle catalyst can be recycled for 4-5 times.
Owner:LIAONING UNIVERSITY
Polycarboxyl magnetic silicon nanosphere immobilized platinum catalyst as well as preparation method and application thereof
InactiveCN108187741AEasy to separateFixed successfullyGroup 4/14 element organic compoundsOrganic-compounds/hydrides/coordination-complexes catalystsHydrosilylationHigh activity
The invention belongs to the technical field of a precious metal catalyst, and discloses a polycarboxyl magnetic silicon nanosphere immobilized platinum catalyst as well as a preparation method and application thereof, wherein the catalyst is that platinum nanoparticles are uniformly dispersed on the surface of a polycarboxyl magnetic silicon nanosphere carrier; the preparation method adopts a nano ferrosoferric oxide magnetic sphere as a core; the nano ferrosoferric oxide magnetic silicon sphere is prepared by coating silicon dioxide by a sol-gel method, and carboxyl functionalization is performed to obtain a polycarboxyl magnetic silicon nanosphere carrier, and then the metal platinum is immobilized to obtain the polycarboxyl magnetic silicon nanosphere immobilized platinum catalyst. A cheap and easily available material is adopted as an immobilizing material, phosphorus or sulfur is not involved in the preparation process, and the polycarboxyl magnetic silicon nanosphere immobilizedplatinum catalyst is prepared which has high activity, selectivity and reusability and is successfully applied to hydrosilylation between n-hexene, n-heptylene, n-octylene, trans-2-hexene, cis-2-hexene, trans-3-hexene, cis-3-hexene and dichloromethylsilane.
Owner:TIANJIN UNIV
Process for producing platinum metal nano-particle for catalysis with polymer microsphere as carrier
InactiveCN101219397ALarge specific surface areaAvoid gatheringOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystChemical reaction
The invention relates to a preparation method of catalytic platinum metal nano particles using polymeric microspheres as a carrier, pertaining to technological field of polymer material and metal nano catalytic material. The invention can synthesize a special type of terpolymer polymeric microspheres of polyamide macro-molecular monomer ingrafted acrylonitrile / styrene through dispersion copolymerization; the catalyst can utilize soluble platinic acid as a source of platinum, and in-situ reduce platinum metal ions into platinum atoms on the surfaces of polymeric microspheres through the complexation reaction between platinum metal ion and a acidamide group, while the acidamide group is located at a hydrophilic polyamide long train of the surface of polymeric microspheres; the polymeric microspheres can be continuously grown and form into stable platinum metal nano particles using polymeric microspheres as the carrier, with the platinum particle diameter be controlled between 2 to 50nm and uniformly dispersed on the surfaces of the polymeric microspheres. The preparation process of the invention has moderate reaction conditions, simply and easily carried method, and the prepared platinum metal nano particles can be used as the catalyst of various chemical reaction.
Owner:JIANGNAN UNIV
Reusable enzyme-free glucose detection device and method
InactiveCN103412031AHighly orderedSame orientationMaterial electrochemical variablesElectrolysisElectrochemical biosensor
The invention relates to a reusable enzyme-free glucose detection device and method and belongs to the field of electrochemical biological sensors. A sensor provided by the invention adopts a three-electrode system, wherein a titanium dioxide nanotube array film which modifies platinum nanoparticles serves as a working electrode, a platinum sheet serves as a counter electrode and an Ag / AgCl or 3 mol / L of KCl serves as a reference electrode; the three-electrode system works in an electrolytic tank, an H2SO2 solution with the concentration of 1 mol / L serving as electrolyte is added into the electrolytic tank, and the Pt electrode, the working electrode and the reference electrode are connected with an electrochemical analysis instrument respectively, so that detection can be performed; after detection is finished, a detection function can recover after irradiation is performed for 30 minutes under ultraviolet light; the lower limit of glucose detection is 4*10<-5> mmol / L. Compared with a traditional enzyme method, the enzyme-free detection method has the advantages that the detection limit is increased by above 90%. A novel, simple, convenient, quick, low-cost, stable and reusable enzyme-free glucose detection method is provided.
Owner:NORTHEASTERN UNIV
Method for preparing catalyst for hydrogenolysis of biodiesel by-product glycerinum to produce 1,3-propylene glycol
ActiveCN105688906AEnhanced mass transferAchieve connectionPreparation by OH group eliminationMetal/metal-oxides/metal-hydroxide catalystsBiodiesel1,3-Propanediol
The invention relates to a method for preparing a catalyst for hydrogenolysis of biodiesel by-product glycerinum to produce 1,3-propylene glycol.The catalyst is platinum nano-particles (PtNPs) assembled in a hole channel of mesoporous alumina (mAl2O3) and modified by silicotungstic acid (HSiW), which is abbreviated as PtNPs-HSiW / mAl2O3.The method for preparing the catalyst comprises the steps that the PtNPs are added into an aluminum oxide synthesis system which is in a solvent evaporation induced self-assembly mode, and HSiW modification is conducted.The PtNPs are synthesized through an ethylene glycol reduction method, the solvent evaporation induced self-assembly system mainly comprises a template agent F108, aluminum oxide precursor sec-butyl alcohol aluminum and acid substance, and HSiW modification is conducted through an equivalent-volume impregnation method.By means of the catalyst, glycerinum can produce 1,3-propylene glycol in a hydrogenolysis mode.Due to the special structure that metal platinum in the catalyst is assembled in the carrier hole channel, compared with traditional catalysts, the catalyst has the advantages that the metal loss ratio is lower and the effect is more stable after being reused for multiple times.
Owner:TONGJI UNIV
Reconfigurable modular micro-robot and preparation method thereof
The invention relates to a self-driven reconfigurable modular robot and a preparation method thereof. According to the reconfigurable modular robot, carbon nanometer material fibers which are asymmetrically modified by platinum nanoparticles are used as assembling units, and the reconfigurable modular robot is formed by end-to-end connecting of the assembling units in a modular assembling mode. The platinum nanoparticles on the assembling units are catalyzed and disintegrated in a chemical solvent hydrogen peroxide solution to react and produce bubbles, so that the fiber-like assembling unitsobtain steady thrust moment on the liquid surface, and stable fixed-axis-like rotation is formed accordingly. Structural design and directional stress analysis are conducted on the multiple fiber-likeself-driven units, a highly customizable micro braking system is obtained in the modular assembling mode, and stable and controllable rotation or linear displacement movement needs to be achieved according to actual use scenes. The carbon nano-material fibers are oriented carbon nanotube fibers or graphene fibers. The reconfigurable modular micro-robot has great potential in the field of more intelligent micro-robots with highly controllable moving modes.
Owner:FUDAN UNIV
Preparation method of electrochemical sensor for detecting polymorphism of ADRB1-115G>C gene
ActiveCN106290521AHigh catalytic activityHigh sensitivityMaterial analysis by electric/magnetic meansCeriumSingle strand dna
The invention relates to a preparation method and an application of an electrochemical sensor for detecting the polymorphism of metoprolol personalized medicine gene-beta1 adrenergic receptor (ADRB1), and belongs to the technical field of electrochemical detection. The preparation method is characterized by comprising the following steps: firstly reducing cerium dioxide (CeO2) onto graphene oxide (GO) to obtain a GO-CeO2 composite material, reducing platinum nano particles on the surface of the composite material, and mixing a single-chain DNA probe with the composite material to obtain a detection probe; self-assembling nano gold and avidin to fix the biotinylation single-chain DNA capturing probe, thereby preparing the electrochemical sensor for detecting the polymorphism of the ADRB1-1165G>C gene. The sensor is successfully used for detecting the single base mutation of the ADRB1 gene. The electrochemical sensor for detecting the polymorphism of the ADRB1-1165G>C gene has the advantages of high sensitivity, high specificity, and rapidness and convenience in detection. A novel detection method is provided for the metoprolol personalized medicine.
Owner:CHONGQING MEDICAL UNIVERSITY
Preparation method of platinum nanoparticle loaded platinum nanoparticle crystals
The invention relates to a preparation method of platinum nanoparticle loaded platinum nanoparticle crystals. The preparation method comprises the following steps that 1, a certain quantity of chloroplatinic acid is selected and is dissolved in pure water to be prepared into chloroplatinic acid solution with the concentration being 50mM to 400mM; 2, a certain quantity of CTAB (cetyl trimethyl ammonium bromide) is weighed, is prepared into 30-60mM water solution and is marked as solution 1; one kind or several kinds in three kinds of amino acid including L-lysine, L-leucine and L-serine are prepared into 0.1 to 1 mol / L water solution and is marked as solution 2; and the solution 1 and the solution 2 are prepared into mixed induction liquid according to the proportion being 1:9, and the mixed induction liquid is marked as solution 3; 3, 30 to 60ml of solution 3 is added into a hydrothermal reaction kettle, meanwhile, 0.01 to 1 ml of 50mm to 400mM chloroplatinic acid solution is added; the solution is stirred for 0.5 to 4 hours and is then subjected to hydrothermal treatment for 3 to 8 hours at 150 to 200 DEG C, and the particle placement time is 12 to 24 hours after the hydrothermal treatment; and 4, a centrifugal tube contained with reaction products is centrifuged for 10 to 20 minutes at the rotating speed being 5000 to 6500 rpm, then, absolute ethyl alcohol is added for cleaning for 3 to 5 times, and final products are obtained.
Owner:ZHEJIANG SCI-TECH UNIV
Novel non-enzymatic glucose sensor
ActiveCN107422010AThe method of modifying the electrode is simpleEasy to makeMaterial electrochemical variablesGlucose sensorsMaterials science
The invention provides a novel non-enzymatic glucose sensor which is mainly composed of an electrode modifying material and a modified electrode. The modifying material comprises a graphene iron oxide RGO-Fe2O3 nano composite material which comprises reductive graphene RGO, nano magnetic iron oxide Fe2O3 and chitosan CS, and platinum nanoparticles Pt NPs. The modified electrode is a glassy carbon electrode GCE with diameter of 3mm-6mm or a silver electrode or a gold electrode or a platinum electrode or a one-off printed graphite electrode. The novel non-enzyme glucose sensor has the beneficial effects of being wide in linear range, low in detection limit and quick in response. According to the results, the novel non-enzyme glucose sensor has good catalytic reducing ability, and an ideal choice for electrochemical hydrogen peroxide detection and glucose detection. The novel non-enzyme glucose sensor can be used for detecting glucose of the diabetic, and is wide in application prospect.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Multi-metallic catalyst for catalyzing reforming reaction and preparation method of multi-metallic catalyst
InactiveCN104148074AImprove reforming performanceImprove catalytic performanceCatalytic naphtha reformingMetal/metal-oxides/metal-hydroxide catalystsCatalytic reformingPt element
The invention relates to a multi-metallic catalyst for catalyzing reforming reaction and a preparation method of the multimetallic catalyst, belonging to the technical field of catalysts. The catalyst is prepared from nickel-copper and platinum nanoparticles, aluminum oxide particles and a composite oxide carrier, wherein the nickel-copper and platinum nanoparticles are uniformly dispersed, and the composite oxide carrier is formed by calcining LDHs (Layered Double Hydroxides). A synergistic effect exists between metals, and the reforming performance of the catalyst can be effectively improved. The catalyst uses bimetallic composite hydroxides which are also known as Layered Double Hydroxides(LDHs) or LDHs loaded with a small amount of platinum as a catalyst precursor, and the molar ratio of Cu<2+> and Ni<2+> in divalent ions of a LDHs layer board is 0.5-3. The catalyst precursor is subjected to calcination reduction to obtain the catalyst. N-heptane is utilized for detecting the reforming performance of the catalyst, the highest n-heptane conversion rate is 85 percent, the methylbenzene selectivity is 16 percent, and the highest heterogeneous selectivity is 39 percent.
Owner:BEIJING UNIV OF CHEM TECH
Tree-type high-molecular polyamide-amine wrapped platinum nanometer particles, its preparation method and applications
InactiveCN103263437ALow toxicityHeavy metal active ingredientsAntinoxious agentsCytotoxicityPolyamide
The invention discloses tree-type high-molecular polyamide-amine wrapped platinum nanometer particles, and its preparation method, wherein the tree-type high-molecular polyamide-amine is shown as a formula (1). The tree-type high-molecular polyamide-amine and potassium chloroplatinate are used as raw materials, a sodium borohydride solution is used in a reduction reaction, and the tree-type high-molecular polyamide-amine wrapped platinum nanometer particles are omitted. The invention further provides application of the tree-type high-molecular polyamide-amine wrapped platinum nanometer particles as a catalase simulation enzyme. The tree-type high-molecular polyamide-amine wrapped platinum nanometer particles has small cytotoxicity, can effectively and safely remove active oxygen in a cell, can be used as the catalase simulation enzyme, and has advantages of high efficiency and low toxicity.
Owner:EAST CHINA NORMAL UNIV
Biosensor for detecting Hx(hypoxanthine) in aquatic products
InactiveCN109856102ACan know the concentrationEasy to manufactureFluorescence/phosphorescenceOxygenHypoxanthine synthesis
The invention relates to a biosensor for detecting Hx (hypoxanthine) in aquatic products and application thereof, and belongs to the field of food analysis. A fluorescence biosensor is built on the basis of the catalysis activity of Pt NPs (platinum nanoparticles), and is used for detecting the content of Hx in the aquatic products. A provided sensing system consists of XOD (xanthine oxidase), OPD(o-phenylenediamine) and Pt NPs; Hx reacts with oxygen under the existence of XOD to produce uric acid and H2O2; the Pt NPs can catalyze the oxidization reaction of the OPD and the H2O2 to produce 2,3-phenazine diamine giving out yellow fluorescence; and a fast, simple, convenient and sensitive aquatic product freshness degree detection method is provided. The novel detection method has the characteristics that the preparation of the Pt NPs is simple; the acquisition is easy; the simple and convenient analysis on the aquatic product freshness degree can be realized; the operation is simple; and the sensitivity and the selectivity are high. The popularization and the use are easy.
Owner:FUZHOU UNIV
Preparation method for porphyra microcrystalline cellulose/nano platinum composite material
InactiveCN105367828AImprove antibacterial propertiesMaterials are cheap and readily availableFiberSolvent
The present invention relates to a preparation method for a porphyra microcrystalline cellulose / nano platinum composite material, and belongs to the field of antimicrobial composite material preparation. The invention aims to solve the problems in a conventional platinum nano antimicrobial composite material preparation process that platinum nanoparticles are prone to agglomeration and cannot be uniformly dispersed on the surface of a material substrate, and thus an antibacterial effect is poor. The method disclosed by the present invention is characterized by comprising the steps of carrying out acid pickling on porphyra fiber and using calcium hypochlorite for bleaching, then carrying out second acid hydrolysis and alkaline leaching to prepare microcrystalline cellulose, taking ethylene glycol as a reducing agent and a reaction solvent to enable nucleation and growth of platinum nitrate nanoparticles, and uniformly distributing the nanoparticles on the surface of microcrystalline cellulose. Accordingly, the anti-bacterial performance is increased to 95% or higher.
Owner:丁玉琴
In-situ preparation method of mesoporous alumina loaded with platinum nanoparticles
ActiveCN104480429APrevent sinteringAvoid reunionAnodisationVacuum evaporation coatingSputteringBinary alloy
The invention belongs to the technical field of nanomaterials, provides an in-situ preparation method of mesoporous alumina loaded with platinum nanoparticles by adopting a magnetron sputtering and anodizing duplex technology, and aims to provide a productionmethod of mesoporous aluminawhich is loaded with platinum nanoparticles and has the advantages of simple process, low cost, good dispersibilityof nano particles and low probability of agglomeration of nano particles. The technical scheme is that the in-situ preparation method of mesoporous alumina loaded with the platinum nanoparticles comprises two steps including preparation of an Al-Pt binary alloy and anodizing. The mesoporous alumina loaded with the platinum nanoparticles and prepared with the method has the characteristics of simple process, low cost, good dispersibility of nano particles, low probability of agglomeration of the nano particles and the like.
Owner:CHONGQING UNIV OF TECH
Nano-bioprobe for detecting pathogenic bacteria and preparation method thereof
ActiveCN109536571ASuitable for online real-time monitoringHigh sensitivityMicrobiological testing/measurementBiological material analysisElectricityPlatinum nanoparticles
The invention provides a nano-bioprobe for detecting pathogenic bacteria and a preparation method thereof. The nano-bioprobe is composed, in a coupling manner, a magnetic core-shell nanostructure anda specific recognition molecule targeted to the pathogenic bacteria; the magnetic core-shell nanostructure is prepared with a Fe3O4 particle being a core and a SiO2 layer, in which platinum nanoparticles are embedded, being a shell layer, the whole nanostructure carries negative electricity and has mimic peroxidase activity. The nano-bioprobe has the mimic peroxidase activity, so that existence ofthe pathogenic bacteria is quickly detected through a colorimetric method. The preparation method is simple in process, has good operability and is environment-friendly, wherein the nano-bioprobe canquickly detect the pathogenic bacteria and has excellent application prospect.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Single-stranded DNA/reduced graphene/cottony platinum nanoparticle as well as synthesis and application thereof
InactiveCN104868133AImprove catalytic performanceImprove anti-toxic performanceCell electrodesSynthesis methodsSingle strand dna
The invention relates to a single-stranded DNA / reduced graphene / cottony platinum nanoparticle as well as synthesis and application thereof. The synthesis method comprises the following steps: performing pyrolysis on milt DNA sodium salt to form single-stranded DNA, adding oxidized graphene to a single-stranded DNA solution under a pyrolysis temperature, stirring uniformly, and then adding trisodium citrate for reduction to obtain a reduced graphene solution modified by the single-stranded DNA; treating a glassy carbon electrode to be clean, dropwise adding the reduced graphene solution modified by the single-stranded DNA, and drying for standby use; using the obtained glassy carbon electrode as a working electrode, using a Ag / AgCl electrode as a reference electrode, using a platinum wire electrode as a counter electrode, performing electrochemical deposition in a chloroplatinic acid mixed solution, and synthetizing the single-stranded DNA / reduced graphene / cottony platinum nanoparticle. Compared with the prior art, the cottony platinum nanoparticle by using reduced graphene modified by the single-stranded DNA as a base synthetized by the synthesis method is used for a methanol fuel cell anode material, the poisoning problem of the methanol fuel cell anode material is successfully solved, and the catalytic property and poison resistance of the material are improved.
Owner:SHANGHAI NORMAL UNIVERSITY
Nano gel containing platinum nano particles and preparation method and application thereof
The invention relates to a nano gel containing platinum nano particles and a preparation method and application thereof. The nano gel takes cisplatin as a cross-linking agent in advance, can wrap quinacrine dye, and then reduces the cisplatin in the nano-gel in situ under the reduction of ethanol so as to form the platinum nano particles. Quinacrine is a lysosome dye, and can label lysosomes in cells in combination with the action of the nano gel. By utilizing the superoxide dismutase-like characteristics of the platinum nano particles, in the fluorescence imaging process, the platinum nano particles can remove active oxygen free radicals generated by illumination induction, so that the lysosomes can be protected from being damaged in the imaging process, and the long-term, stable and low-phototoxicity cell lysosome imaging is realized.
Owner:THE INST OF BASIC MEDICAL SCI OF CHINESE ACAD OF MEDICAL SCI
Tumor microenvironment response type nucleus-targeting platinum nanoparticles as well as preparation method and application
ActiveCN110624111AImprove specific targeting aggregationImprove tumor treatment effectPowder deliveryInorganic active ingredientsPolymer modifiedPlatinum salts
The invention discloses tumor microenvironment response type nucleus-targeting platinum nanoparticles comprising platinum nanoparticles and nucleus-targeting peptide and amphiphilic polymer modified on the platinum nanoparticles. The invention further discloses a preparation method of the tumor microenvironment response type nucleus-targeting platinum nanoparticles. The preparation method comprises the steps as follows: a platinum salt precursor and a blocking agent are dissolved in water to form a precursor solution, and a strong reducing agent is added for a reduction reaction to obtain subminiature platinum nanoparticles; amphiphilic polymers are dissolved in a good solvent, a modifier is added, and stirring reaction is conducted to obtain a n amphiphilic polymer is obtained; the subminiature platinum nanoparticles and nucleus-targeting polypeptide are dissolved in water, and stirring reaction is conducted to prepare nucleus-targeting platinum nanoparticles; and the nucleus-targeting platinum nanoparticles and the amphiphilic polymer are dissolved in water, and stirring reaction is conducted to obtain the tumor microenvironment response type nucleus-targeting platinum nanoparticles. The tumor microenvironment response type nucleus-targeting platinum nanoparticles can specifically target tumor cells, center cell nucleus to damage DNA and kill tumor cells.
Owner:ZHEJIANG UNIV
Mn-PtM/C type platinum-based oxygen reduction catalyst as well as preparation method and application thereof
ActiveCN114400338AReduce reunionEvenly dispersedMaterial nanotechnologyFuel and primary cellsPtru catalystPolyol
The invention provides a Mn-PtM / C type platinum-based oxygen reduction catalyst and a preparation method and application thereof.The preparation method comprises the steps that a conductive carbon carrier with the large specific surface area is selected as a carrier, platinum nano-particles or platinum alloy nano-particles are loaded on the carbon carrier based on a polyol reduction method and with manganese as an auxiliary, and the Mn-PtM / C type platinum-based oxygen reduction catalyst is obtained; the Mn-PtM / C type platinum-based oxygen reduction catalyst is obtained through one-pot preparation, the preparation steps are simple, operation is convenient, and the yield reaches 90%; according to the prepared Mn-PtM / C type platinum-based oxygen reduction catalyst, Mn is used as an auxiliary agent, Mn and Pt do not form an alloy, the content of Pt is low, the cost is low, the addition of the auxiliary agent manganese plays a key role in reduction of platinum or platinum alloy, the dispersity and the particle size of the active component platinum nano particles or platinum alloy nano particles can be adjusted through the addition amount of Mn, and the stability and the stability of the catalyst are improved. The platinum-based oxygen reduction catalyst has improved oxygen reduction performance, and can provide high power density when applied to the field of batteries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
A kind of preparation method of room temperature hydrogen sensor
InactiveCN103558261BIncrease productivityLow costMaterial resistanceHydrogen sensorUltrasonic dispersion
Owner:XIAMEN UNIV
Preparation method of carbon material loaded high-entropy alloy oxygen reduction electrocatalyst
PendingCN114094129AWill not limit the typeModerate dispersionCell electrodesPtru catalystHigh entropy alloys
The invention discloses a preparation method of a carbon material loaded high-entropy alloy oxygen reduction electrocatalyst, which comprises the following steps of forming a coating layer for adsorbing metal ions on the surface of platinum carbon, and then dipping in a metal salt solution, wherein a metal source of the metal salt solution at least comprises four metal elements, and calcining the impregnated platinum carbon, melting metal ions into platinum nano-particles through thermal diffusion so as to form a high-entropy alloy, and then performing acid pickling and drying, thereby obtaining the electrocatalyst. According to the preparation method, platinum and carbon are used for high-entropy alloying, the subsequent carrier loading process is avoided, platinum is anchored to the surface of the carrier, moderate dispersity is achieved, thermal migration of platinum in the high-temperature calcination reduction process can be restrained, and alloy particles can keep small size and good dispersity; alloy types are not limited, and the universality is high; the half-wave potential of the prepared PtNiCoMnCe high-entropy alloy is 0.938 V which is superior to 49 mV of commercial platinum carbon, and the oxygen reduction performance is good.
Owner:NANJING UNIV +1
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