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74results about How to "Good catalytic properties" patented technology
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Preparation method of high performance nanometer sized and superfine tungsten powder
The invention relates to a method of making kind of high performance nanometer tungsten powder, which is made from 5(NH4)2O.12WO3.5H2O. Heat the above material in container and decompose it into WO3, NH3, and H2O vapor. Then dispose the NH3 into N2 and H2 by using WOx which is good medium for disposing NH3. Deoxidize WO3 into blue WO2.9 through controlling reaction temperature and stove gas pressure. Keep on the same process and deoxidize part of the above WO2.9 into more active WO2.72, so as to improve active property of the whole WOx. Then deoxidize it into quite fine tungsten powder through high purity H2 and remove moisture of the WOx and cool it by air conditioner, deactivate it with protecting gas.
Owner:XIAMEN GOLDEN EGRET SPECIAL ALLOY
Method for preparing urchin-shaped hydroxyferric oxide and urchin-shaped ferric oxide nano material
InactiveCN101734726AEasy to operateLower requirementNanostructure manufactureCell electrodesFiltrationFerrous salts
The invention relates to a method for preparing an urchin-shaped hydroxyferric oxide and urchin-shaped ferric oxide nano material, which adopts a glucose guiding hydrolysis process and an annealing process and specifically comprises that: a ferrous salt is used as a raw material, the hydrolysis reaction is guided by adopting a saccharide structure indicator, the weight ratio of the glucose to an iron source is 0.5 to 5, and the molar concentration of the saccharide structure indicator is 0.02 to 0.2M; and then, an oxidizing gas is introduced into the raw materials at the temperature of between 25 and 100 DEG C, a yellow green urchin-shaped hydroxyferric oxide product is obtained through stirring reflux reaction, washing and filtration, and the product is annealed to form the urchin-shaped ferric oxide nano material with adjustable specific surface area and topography. The method has the advantages of simple operation, low requirement for equipment, low cost and high efficiency, and is easy in industrial application and popularization; and the synthesized nano material has the advantages of high purity, little impurity content and large specific surface area, can obviously improve the performance of a catalyst and a battery, and has remarkable economic benefit and social benefit.
Owner:ZHEJIANG NORMAL UNIVERSITY
Method and apparatus for preparing blue tungsten oxide by ammonium paratungstate self-reduction
InactiveCN1594107AGood catalytic propertiesReduce pollutionTungsten oxides/hydroxidesAmmonium paratungstateWater vapor
The invention discloses a method and apparatus for preparing blue tungsten oxide by ammonium paratungstate self-reduction, wherein the discharging end of the preparing apparatus is provided with sealed discharger, a cooling device, an air exhaust fan and an air vent, the preparation comprises loading the ammonia paratungstate into the furnace tube of the preparing apparatus, heating the furnace tube, so as to decompose the ammonia paratungstate into WO3, ammonia gas NH3 and water vapor H2O, further decomposing the NH3 into nitrogen N2 and hydrogen H2, controlling the reaction temperature and combustion gas pressure so as to deacidize the tungsten trioxide WO3 into blue tungsten oxide.
Owner:XIAMEN GOLDEN EGRET SPECIAL ALLOY
Lamellar micron flower-like MoS2/Ni3S2/NiFe-LDH/NF material, synthesis method and application thereof
ActiveCN110327942AGood bifunctional catalytic activityHigh catalytic activityPhysical/chemical process catalystsElectrodesSynthesis methodsElectrolyte
The invention discloses a lamellar micron flower-like MoS2 / Ni3S2 / NiFe-LDH / NF material, a synthesis method and application thereof. The method includes: taking nickel foam as the substrate and nickel source, firstly synthesizing a MoS2 / Ni3S2 / NF nanorod array under a 180-220DEG C hydrothermal condition, then introducing a nickel-iron double-layer hydroxide under a 120-160DEG C hydrothermal condition, thus finally forming the lamellar micron flower-like MoS2 / Ni3S2 / NiFe-LDH / NF material. The target product prepared according to the invention has good catalytic properties in the anodic urea oxidation reaction and cathodic hydrogen evolution reaction in an alkaline solution, and shows good bifunctional catalytic activity. At the same time, in an alkaline double-electrode electrolytic tank systemcontaining urea, only a 1.408V (vs.RHE) tank pressure is needed for reaching an electric current density of 100mA cm<-2>, and is far lower than that of a precious metal double-electrode system in an alkaline electrolyte solution. Therefore, the material is expected to replace precious metals for application in efficient urea oxygenolysis and electrocatalytic hydrogen evolution.
Owner:HUBEI UNIV
Method for Forming Zno Nano-Array and Zno Nanowall for Uv Laser On Silicon Substrate
InactiveUS20070220713A1Excellent laser characteristicSuperior laser characteristicMaterial nanotechnologyPolycrystalline material growthHexamethylenetetramineZno nanoparticles
Provided are low-temperature formation methods of a perfectly oriented ZnO nanorod array and a new-type ZnO nanowall array having a new crystal growth rate, morphology, and orientation, from ZnO nanoparticles coated on a substrate. The method of forming the ZnO nanorod array includes synthesizing ZnO nanoparticles, coating on a substrate the ZnO nanoparticles serving both as a buffer layer and a seed layer, and growing the ZnO nanoparticles into crystals in a nutrient solution containing Zn nitrate, Zn acetate, or a derivative thereof, and hexamethylenetetramine. The method of forming the ZnO nanowall array includes synthesizing ZnO nanoparticles, coating on a substrate the ZnO nanoparticles serving both as a buffer layer and a seed layer, and growing the ZnO nanoparticles into crystals in a nutrient solution containing Zn acetate or its derivative and sodium citrate.
Owner:NANOHYBRID CO LTD
Preparation process of composite copper powder catalyst
ActiveCN102941102AReduce lossesPrecise control of ingredientsMetal/metal-oxides/metal-hydroxide catalystsElectrolysisZinc alloys
The invention provides a preparation process of a composite copper powder catalyst, comprising the steps of cutting an electroplating copper plate into a copper block and machining into copper scales; grinding the copper scales into sheet-shaped copper powder; obtaining sheet pure copper powder through a magnetic selection and air flow grading technology; smelting and atomizing a copper-tin-zinc alloy to prepare needed copper-tin-zinc alloy powder; drying and screening, and grinding to obtain scale-shaped copper-tin-zinc alloy powder; magnetically selecting and screening to obtain the needed copper-tin-zinc alloy powder; and mixing the sheet pure copper powder with the copper-tin-zinc alloy powder according to a ratio to obtain the needed composite copper powder catalyst. According to the preparation process of the composite copper powder catalyst, elements which are harmful to an environment are not introduced in a whole process, the quality stability of a product is good, concave-convex defects of the surface of powder grains are more and the specific surface is large; the catalysis property of the composite copper powder catalyst is obviously better than that of common composite copper powder so that the effect of an organic silicon monomer synthesized metal catalyzing system is improved, the time-space yield of an organic silicon monomer synthesized fluidized bed is increased, a synthesis reaction period is prolonged, the selectivity is improved, the cost is reduced and good economic benefits are created.
Owner:湖南省天心博力科技有限公司
Chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and preparation method thereof
PendingCN108310982ALarge specific surface areaImprove adsorption capacitySemi-permeable membranesFiberHalf-life
The invention provides a chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and a preparation method thereof. The preparation method comprises the following steps of performing electrostatic spinning calcining to prepare a zirconium oxide fiber film; mixing with a corresponding organic ligand and an activated acid solution, and performing hydrothermal reaction, so as to obtain the self-disinfection MOF fiber filtering membrane. The prepared self-disinfection MOF fiber filtering membrane has the advantages that the additional support material is notneeded, the self ultra-large specific surface area of MOFs is maintained, and the adsorption capacity and catalytic property are excellent; by adopting the micro-nano multi-stage structure, the reaction matter is favorably transmitted, the catalytic sites are exposed, and the agglomeration of the catalyst is avoided; the excellent self-disinfection property is realized; the degrading conversion rate of a simulating matter of a chemical warfare agent is high, the half-life period is short, and the stability in cyclic use is good; by adopting the thin film form, the self-disinfection MOF fiber filtering membrane can be directly applied into the actual filtering protection device.
Owner:SHANDONG UNIV
Hollow spherical mesoporous PtAu nanomaterial and preparation method and application thereof
ActiveCN106935871AStructurally precise regulationGood catalytic propertiesCell electrodesPlatinumMethanol fuel
The invention discloses a hollow spherical mesoporous PtAu dual-metal methanol fuel cell catalyst nanomaterial and a preparation method thereof. The hollow spherical nanometer comprises hollow spheres formed by a shell layer; the inner surface of the shell layer is formed by gold while the outer surface of the shell layer is formed by platinum; the shell layer adopts a continuous porous structure; the shell layer is 5-200nm in thickness; the holes are 1-15nm in diameter; the hollow spherical nanometer is 50-2,000nm in grain diameter; and the atomic ratio of gold to platinum in the shell layer is (0.1-9.9) to 1. A dual-metal shell layer is formed on a temperate through a template method via a seed growth method to prepare the core-shell structure; and then the template is removed by adopting a solvent to form the hollow dual-metal shell layer. According to the method disclosed by the invention, the catalyst structure can be realized by controlling preparation conditions in each step, so that accurate regulation and control on appearance and compositions, and simple and easy implementation of the operation are achieved.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Low-temperature solid oxide fuel cell and making method thereof
ActiveCN103219525ASimple processEasy industrial scale-upFinal product manufactureCell electrodesOxide ceramicFuel cells
The invention relates to a low-temperature solid oxide fuel cell and a making method thereof. The structure of the low-temperature solid oxide fuel cell comprises an anode film deposited on the inner wall of a porous perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta composite film, a cathode film deposited on the inner wall of the porous perovskite structure oxide ceramic La1-xSrxGa1-yMgXO3-delta composite film, and a compact perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta electrolyte film positioned between the anode film and the cathode film, wherein each of x, y and delta is equal to or more than 0 and equal to or lower than 0.2, and the perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta composite film is formed through a porous perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta substrate, the perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta and a porous perovskite structure oxide ceramic La1-xSrxGa1-yMgyO3-delta film. The invention also provides the making method of the low-temperature solid oxide fuel cell.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Carbon-based catalytic purification material for efficiently adsorbing and decomposing harmful substances and application of material
InactiveCN104117371AEliminate formaldehydeEasy to useDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsAir filtrationPhosphate
The invention belongs to the technical field of air purification, and particularly relates to a carbon-based catalytic purification material for efficiently adsorbing and decomposing harmful substances and application of the carbon-based catalytic purification material, aiming to solve the technical problem that the air purification effect is poor in the prior art. The catalytic purification material comprises a carbon-based carrier, wherein the carbon-based carrier is loaded into any one or the combination of phosphate titanium dioxide and tetrapod-like zinc oxide whiskers. According to the invention, the excellent catalytic property of phosphate titanium dioxide and tetrapod-like zinc oxide whiskers and the powerful adsorption performance of the activated carbon are combined; substances including formaldehyde, benzene and the like are saved, catalytic reaction can be naturally carried out as long as water and oxygen exist in air, without needing of irradiation of visible light and ultraviolet rays, and the catalytic purification material can be conveniently used in various occasions, and also can be prepared into products such as products with various shapes and various functions, such as air filtering materials, air purification bags, air purification sheets, air purification boxes and air purification modules.
Owner:姚将安
Preparation method and application of non-noble metal monatomic difunctional electrocatalyst
PendingCN112221530ALarge specific surface areaLow costPhysical/chemical process catalystsCell electrodesPtru catalystPorous carbon
The invention discloses a preparation method of a non-noble metal monatomic difunctional electrocatalyst, and belongs to the technical field of nano material preparation. According to the invention, metal salts such as Cu, Fe, Ni, Co, Mn, rare earth and the like and corresponding hydrates thereof have a strong adsorption effect with porous carbon spheres in an aqueous solution, and are further mixed with a nitrogen source under the protection of inert gas to obtain the non-noble metal monatomic difunctional electrocatalyst through a high-temperature reaction; the preparation method disclosed by the invention is simple, low in cost and mild in reaction, has certain universality and is beneficial to industrial large-scale production; and the monatomic bifunctional electrocatalyst has a largespecific surface area and excellent electrochemical properties, so the monatomic bifunctional electrocatalyst is suitable for oxygen reduction and oxygen evolution reactions, and is suitable for popularization and application.
Owner:QINGDAO UNIV OF SCI & TECH
Non-noble metal-based two-dimensional MoS2/graphene water reduction catalyst as well as preparation method and application thereof
InactiveCN106925301ASimple preparation processLow costPhysical/chemical process catalystsHydrogen productionHydrogenMass ratio
The invention discloses a non-noble metal-based two-dimensional MoS2 / graphene water reduction catalyst as well as a preparation method and application thereof. The prepared two-dimensional MoS2 / graphene can be effectively applied to preparing hydrogen through photocatalytically reducing water. The two-dimensional MoS2 / graphene water reduction catalyst provided by the invention has the following chemical general formula: (MoS2)x(graphene)y, wherein x to y is the mass ratio between MoS2 and graphene, and x to y is equal to (50-0.25) to 1. The catalyst provided by the invention is made by means of a hydrothermal method, and may perform the cooperative reinforcement on the performance of catalyzing water for preparing hydrogen via reduction by using excellent proton reducing capacity of the MoS2 and good charge transfer capability of the graphene.
Owner:HANGZHOU DIANZI UNIV
Functionalized ionic liquid used for modifying lipase, preparing method and the lipase obtained by modification
InactiveCN104193743AGood biocompatibilityHigh reactivityOrganic chemistryHydrolasesTetrafluoroborateCatalytic effect
The invention discloses a functionalized ionic liquid used for modifying a lipase. The structure of the functionalized ionic liquid is shown as a formula (I). In the formula (I), n is 1-7, m is 1-2, and Y is a chloride ion, a bromide ion, a tetrafluoroborate ion, a hexafluorophosphoric acid radical ion or a trifluoromethylsulfonylamine ion. By subjecting the free lipase to chemical modification with the functionalized ionic liquid, stability, activity and catalytic selectivity of the free lipase can be improved. The invention also discloses a preparing method of the functionalized ionic liquid and the lipase obtained by modification. The functionalized ionic liquid with a multiple heterocycle skeleton structure is introduced onto the surface of the lipase after modification, thus influencing the configuration of the enzyme active center and improving the catalytic effects of the lipase.
Owner:ZHEJIANG GONGSHANG UNIVERSITY
Micro nano silver-based material preparation method and micro nano silver-based material
InactiveCN103978226ALarge specific surface areaNo emissionsMaterial nanotechnologyMaterials preparationMicro nano
Provided are a micro nano silver-based material preparation method and a micro nano silver-based material. The method includes: 1) preparing a silver nitrate solution; 2) preparing a vitamin C solution; 3) dissolving Arabic gum into purified water to obtain an Arabic gum water solution; 4) slowly dissolving the vitamin C solution into the Arabic gum water solution to obtain a solution D; 5) slowly adding the silver nitrate solution into a solution D in the stirring state; 6) utilizing a centrifugal machine to conduct separation, collecting a precipitate; adding alcohol in the precipitate to conduct ultrasonic washing, conducting centrifugal separation after washing to collect the precipitate to obtain silver particles, adding deionized water into the silver particles to conduct ultrasonic washing, conducting centrifugal separation after washing and collecting maple powder to obtain the maple micro nano silver-based material. The micro nano silver-based material which is low in cost, quick in preparation process, high in yield, environmentally friendly and capable of saving energy and the micro nano silver-based material preparation method are provided.
Owner:熊仕显
Electrochemical sensor for simultaneously determining epinephrine and ascorbic acid
InactiveCN101059474AGood compatibilityGood catalytic propertiesBiological testingMaterial electrochemical variablesPorous carbonNafion
The invention belongs to an electrochemical test device, in particular to an electrochemical sensor for testing adrenalin and ascorbic acid synchronously, comprising a glass-carbon electrode which surface is coated by a sequential porous carbon-cation exchange polymer Nafion sensitive film. The invention uses the cation exchange polymer Nafion as disperser, to easily disperse sequential porous carbon in stable property into water. And the electrochemical sensor composed of a sensitive film made by coating the disperser liquid on the surface of the glass-carbon electrode and the glass-carbon electrode can synchronously adrenalin and ascorbic acid.
Owner:NORTHEAST NORMAL UNIVERSITY
Nitrogen and phosphorous doped carbon supported nanoparticle platinum electrocatalyst and method of making
ActiveUS10384193B2Simple structureImprove catalytic performanceMembranesSemi-permeable membranesPlatinumNanoparticle
A platinum-carbon electrocatalyst material comprising a carbon support having a minimum BET surface area of 1000 m2 / g, a nitrogen content of at least 2.5 weight percent, which is present in the form of pyridine, pyridone or pyrrole, a phosphorous content of at least 3 weight percent, which is present in the form of phosphate and phosphonate, and a plurality of platinum nanoparticles dispersed on the carbon support having a maximum average particle diameter of 1.5 nm.
Owner:TDA RES
Catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and preparation method of catalyst
InactiveCN103721718AGood catalytic propertiesEvenly distributedCatalyst activation/preparationLiquid hydrocarbon mixture productionOrganic solventCobalt salt
The invention discloses a catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and a preparation method of the catalyst. The method comprises the following steps: dissolving a mixed liquor of soluble cobalt salt and soluble zircon salt in deionized water to obtain a liquor A; dissolving sodium silicate and a precipitator in the deionized water to obtain a liquor B; under stirring, dropping the liquor A and the liquor B to hot deionized water at the same time; reacting to obtain purple precipitates; washing the precipitates obtained with the deionized water for a plurality of times; adding a mixed liquor of soluble potassium salt and a pore forming substance to the precipitates; then, adding an organic solvent which is 5-20 times the weight of the precipitate and stirring for 2 hours; stirring while distilling the solvent at 110-120 DEG C; drying a taken sample at 110-120 DEG C for 10 hours to obtain a catalyst precursor; and then, tabletting, forming and reducing to obtain the catalyst. In the catalyst, the content of cobalt is 55-75wt%, the content of zircon is 2-4wt% and the content of potassium is 1-2wt%. The catalyst can be used for preparing heavy hydrocarbon from synthesis gases through the Fischer-Tropsch synthesis, and has the characteristics of high catalytic activity, high C<5+> selectivity, long service life and the like.
Owner:HIGH TECH RES INST NANJING UNIV LIANYUNGANG +1
Platinum and polyaniline composite nanofiber three-dimensional functional structure film and preparation method thereof
InactiveCN104032358AWith micro-nano effectStable physical and chemical propertiesElectrolytic coatingsFiberPlatinum
The invention discloses a platinum and polyaniline composite nanofiber three-dimensional functional structure film and a preparation method thereof. The preparation method of the film comprises the following steps: (1) a curing eigenstate polyaniline nanofiber is electrochemically prepared; (2) a conductive polyaniline three-dimensional structure nanofiber structure is prepared through electrochemical doping; and (3) the platinum and polyaniline composite nanofiber three-dimensional functional structure film with wholly platinum-enveloped morphology is prepared through an electrochemical deposition method. The platinum and polyaniline composite nanofiber three-dimensional functional structure film has excellent physical-chemical stability and better catalysis capacity, and can be applied to such biosensors as glucose sensors and lactic acid sensors.
Owner:ZHEJIANG UNIV
Preparation process of flaky pure copper powder catalyst
ActiveCN102935369AHigh purityLow content of harmful impuritiesMetal/metal-oxides/metal-hydroxide catalystsLow activityFluidized bed
The invention relates to a preparation process of a flaky pure copper powder catalyst. The preparation process comprises the steps of: preparing copper cuttings, grinding the copper cuttings, and grading flaky copper to prepare the flaky pure copper powder catalyst. As any element harmful to an environment is not introduced to the whole process course, the harmful impurity content is low, and the stability of product quality is good; the catalytic characteristic is obviously better than that of common composite copper powder, so that the effect of synthesizing a metal catalytic system by an organosilicone monomer is improved, organosilicone monomer synthesis and the space time yield of fluidized beds are increased, the synthetic reaction period is prolonged, the preparation efficiency of dimethyldichlorosilance is improved, the cost is reduced, and the benefits are created; and promoters, such as Zn, Sn and P are used so that the synthetic reaction of the organosilicone monomer can be flexibly regulated according to impurity conditions in the fluidized beds and contact compositional variation, and the problems of low activity and selectivity of the composite copper powder and deteriorated catalytic performances as reaction goes on are solved.
Owner:湖南省天心博力科技有限公司
Rapid determination method of lipase synthetase vitality in non-aqueous phase
InactiveCN1928116ARapid determinationAccurate measurementMicrobiological testing/measurementAlcoholScreening method
Owner:JIANGNAN UNIV
Silver nanoparticle-dispersed cobalt oxide functional thin film material and preparation method
InactiveCN101773838APrecise control of stoichiometric ratioGood catalytic propertiesMetal/metal-oxides/metal-hydroxide catalystsComposite filmChemical solution
The invention relates to a silver nanoparticle-dispersed cobalt oxide functional thin film material and a preparation method, and belongs to the field of photocatalysis. The material is characterized in that the general formula of chemical compositions of the thin film material is Agx / (Co3O4) 1-x, wherein x indicates the mole fraction of constituent element of Ag, and x ranges from 0.01 to 0.85. In the process, cobalt nitrate and silver nitrate are used as raw materials, and ethylene glycol monomethyl ether is used as a solvent; a precursor solution with accurate stoichiometric proportion and uniform compositions is synthesized by chemical solution method, and film is coated on a glass substrate by a spin coater, and finally the Agx / (Co3O4) 1-x composite film is obtained by thermal decomposition and annealing. Silver nanoparticles are uniformly dispersed in a cobalt oxide matrix, and the diameter of the silver particle is 1- 500nm; and the film can observe the plasma resonance absorption peaks of metal particles at a wave band of 350-450nm, and the film has excellent photocatalytic properties under the irradiation of visible light.
Owner:UNIV OF SCI & TECH BEIJING
Flexible filamentous spherical porous amorphous nickel phosphate nanoparticles and preparation method thereof
InactiveCN108083250AGood dispersionNo deformationMaterial nanotechnologyPhosphorus compoundsNickel phosphateSolvent
The invention relates to flexible filamentous spherical porous amorphous nickel phosphate nanoparticles and a preparation method thereof, and particularly provides a method, which is simple, convenient and practical, low in cost, rapid and efficient, and template-free, for preparing the flexible filamentous spherical porous amorphous nickel phosphate nanoparticles; the product is obtained by taking nickel nitrate, sodium dihydrogen phosphate and sodium hydroxide, which are low in price and easy to obtain, as raw materials, taking a mixed solution of water and ethylene glycol as a solvent, andcarrying out a reaction at a certain temperature; the product is the spherical porous amorphous nickel phosphate nanoparticles which have an open skeleton structure and are formed by accumulation of filamentous particles. The flexible filamentous spherical porous amorphous nickel phosphate nanoparticles obtained by the method have the advantages of being high in yield, easy to collect, good in stability, large in specific surface area, high in catalytic activity, and the like, have good catalytic characteristic in catalytic degradation of methylene blue and a catalytic hydrogenation reaction of p-nitrophenol, and can be recycled for a plurality of times. Therefore, an important material basis is provided for practical applications such as catalysis, epoxidation, hydrogen addition reactions, absorption, pigment and ceramic production.
Owner:UNIV OF JINAN
Co0.8Ni0.2TaO6 photocatalyst with visible light response and preparation method and application of Co0.8Ni0.2TaO6 photocatalyst
InactiveCN107159225AImprove decomposition efficiencyEasy to makeWater/sewage treatment by irradiationWater treatment compoundsPhotocatalytic water splittingDecomposition
The invention provides a Co0.8Ni0.2TaO6 photocatalyst with a visible light response. The microstructure of the photocatalyst is porous micro / nano spheres of which the particle sizes are 5-10nm; and the diameters of the porous micro / nano spheres are 0.5-2 microns. The photocatalyst is prepared through sol-gel reaction, spray drying and burning of tantalum chloride, nickel acetate and cobalt nitrate as main reaction materials according to the stoichiometric ratio of a nickel element, a cobalt element and a tantalum element in the Co0.8Ni0.2TaO6. The preparation method is simple in preparation process, relatively low in cost, low in energy consumption; and the prepared photocatalyst has a good catalytic effect, has relatively high catalytic water decomposition efficiency under visible light radiation, and has potential application prospect in the field of hydrogen production from photocatalytic water splitting and water treatment.
Owner:INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
Method for preparing urchin-shaped hydroxyferric oxide and urchin-shaped ferric oxide nano material
InactiveCN101734726BEasy to operateLower requirementNanostructure manufactureCell electrodesFerrous saltsFiltration
Owner:ZHEJIANG NORMAL UNIVERSITY
Method for detecting TBHQ by surface enhanced Raman spectroscopy
PendingCN112461813AGood catalytic propertiesHigh sensitivityRaman scatteringAgainst vector-borne diseasesQuinoneSurface-enhanced Raman spectroscopy
The invention discloses a method for detecting TBHQ by surface enhanced Raman spectroscopy, which relates to the technical field of chemical analysis, and comprises the following steps: carrying out surface enhanced Raman spectroscopy detection on TBHQ after carrying out catalytic oxidation by using a composite nano-enzyme, making a TBHQ working curve, and determining TBHQ in a sample according tothe working curve. According to the method, Cu-I / CDs are used as a reducing agent, polypropyleneimine is used as a protective agent, chloroauric acid is reduced, a composite nano-enzyme system composed of gold nanoparticles and CuI / CDs is obtained, due to the excellent catalytic characteristic of the composite nano-enzyme system, TBHQ is selectively oxidized into a red oxidized quinones substance, and based on the surface enhanced Raman characteristic of a TBHQ oxidation product, a novel method for detecting TBHQ by surface enhanced Raman spectroscopy with high sensitivity and strong selectivity is established.
Owner:YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION
Beta-xylosidase in vivo enzyme aggregate and preparation method thereof
ActiveCN106520733AImprove mechanical stabilityHigh purityGlycosylasesVector-based foreign material introductionActive enzymeFiltration
The invention discloses a preparation method of a beta-xylosidase in vivo enzyme aggregate. The preparation method comprises the following steps: (1) splicing a connecting peptide to a biparental short peptide to construct an expression vector, wherein the biparental short peptide is ELK16; (2) connecting a beta-xylosidase coded gene to the expression vector and transforming the mixture to a recipient bacterium to obtain an engineering bacterium which can express beta- xylosidase-short peptide fused protein; and (3) performing induced expression on the engineering bacterium, breaking the walls of the cells, and performing centrifugalization and / or filtration to obtain a precipitate to obtain the beta-xylosidase in vivo enzyme aggregate. Compared with conventionally expressed ThXylC, the ThXylC-ELK16 active enzyme aggregate obtained by the invention is improved in specific activity and catalytic efficiency, and the heat resistance thereof is further remarkably improved. The method has a huge potential of popularization and application in production.
Owner:SOUTH CHINA UNIV OF TECH
Patternable environmental catalysis materials and size preparation method thereof
InactiveCN101947447AReduced Complexity RequirementsParticles have a large specific surface areaCatalyst activation/preparationMetal/metal-oxides/metal-hydroxide catalystsGranularityRepeatability
The invention relates to nano-sized patternable environmental catalysis materials (metal / semiconductor catalyst / adsorbing material) and a size preparation method thereof, belonging to the field of inorganic nano materials. The product surface is in a porous structure with uniform granularity; and the product has strong light absorbing ability, and can express a certain methanal degrading ability at the dark and illumination condition, and the performance of the Ag / TiO2 / AlO3 is the highest. The prepared pattern has better visual effect; and the selectivity of a substrate is wide, and the substrate can be a high temperature resistant material, such glass, ceramic tile, stone, metal, ceramics and the like, and has wide application. The invention has simple operation and good repeatability, has low requirement on the complexity of environment and equipment, integrates practicability and artistry into a whole, purifies the environment, brings physical and mental pleasure, and is suitable for large-scale development and production so as to cope with the indoor environment pollution on the rise.
Owner:SHANDONG UNIV
Preparation method of Ni single atom doped cobaltosic oxide nano material and product and application thereof
InactiveCN111072073AImprove response characteristicsLarge specific surface areaMaterial nanotechnologyCobalt oxides/hydroxidesHydrogen atmosphereCobalt(II,III) oxide
The invention discloses a preparation method of a Ni single atom doped cobaltosic oxide nano material and a product and application thereof. The nickel atom doped Co3O4 nano material is prepared by adopting a microwave hydrothermal reaction and subsequent heat treatment method. The preparation method comprises the following steps: firstly, synthesizing a Ni precursor solution by utilizing a microwave hydrothermal reaction, putting a proper amount of Ni precursor into a Co precursor solution, continuing the microwave reaction, and then putting the obtained product into a hydrogen atmosphere forheat treatment to obtain the nickel monatomic doped Co3O4 nano material. The obtained nano material has a large specific surface area, is used in the fields of formaldehyde gas detection, hydrogen preparation by photocatalysis of water and the like, and can increase the contact area between the material and reactants; and the defect mode of the nano material can be increased through nickel monatomic doping, a very important role is played in improving the electrical property and catalytic property of the material, the preparation method is simple, and the process conditions are easy to realize.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
Method for controlling preparation of platinum particle highly-dispersed mesoporous carbon-based compound material as high-efficiency hydrogen-producing electrocatalyst
ActiveCN109647381AIncrease porosityGood catalytic propertiesMetal/metal-oxides/metal-hydroxide catalystsElectrodesDimethyl formamideChemistry
The invention relates to a method for controlling preparation of a platinum particle highly-dispersed mesoporous carbon-based compound material as a high-efficiency hydrogen-producing electrocatalyst,and the method comprises: 1) mixing 4-carboxyl porphyrin, zirconium tetrachloride, benzoic acid and N,N-diethyl formamide to obtain a platinum-loaded carrier; 2) dissolving the platinum-loaded carrier obtained in the step 1) and a certain amount of a platinum source in N,N-dimethyl formamide, water or a mixed solution of the N,N-dimethyl formamide and the water, heating to a certain temperature,and keeping the temperature for a certain time to obtain a platinum-loaded roasting precursor; 3) roasting the platinum-loaded roasting precursor obtained in the step 2) in an inert gas for carbonization; and 4) and treating the roasted product obtained in the step 3) with an acid (preferably hydrofluoric acid) to obtain the compound material. The platinum particle highly-dispersed mesoporous carbon-based compound material disclosed by the invention can be used as the high-efficiency hydrogen-producing electrocatalyst, and the nano-scale effect and the surface effect of high-dispersion platinum particles are utilized, so that the platinum particles are fully utilized, and the utilization rate of resources is greatly improved.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Method for catalyzing hydrogen peroxide to oxidize and degrade phenol pollutants in wastewater by using Cu(II)-Schiff base complex
InactiveCN110156139AGood catalytic propertiesAchieve oxidative degradationOrganic-compounds/hydrides/coordination-complexes catalystsWater contaminantsFenton reactionWastewater
The invention discloses a method for catalyzing hydrogen peroxide to oxidize and degrade phenol pollutants in wastewater by using a Cu(II)-Schiff base complex. The Cu(II)-Schiff base complex is addedinto organic wastewater containing phenolic pollutants and is used for oxidative degradation of the phenolic compounds in the wastewater under a near neutral and water-phase condition. The Cu(II)-Schiff base complex prepared by the preparation method shows good catalytic properties, can be used to realize oxidative degradation of the phenolic compounds under a near neutral and water-phase condition, solves the problem that a Fenton reaction needs to be carried out under an acidic condition, and has a good potential application value in treatment of wastewater containing phenols and the like.
Owner:HENAN NORMAL UNIV
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