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Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles
ActiveCN105591115ASimple preparation processHigh economic valueMaterial nanotechnologyCell electrodesPrecious metalNoble metal
The invention provides a preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles. The preparation method comprises steps as follows: preparation of a heteroatom doped graphene-based material: a graphene-based material is subjected to ultrasonic treatment, a heteroatom precursor is added, heteroatom doping is performed in a hydrothermal kettle at the temperature of 150-200 DEG C, and the heteroatom doped graphene-based material is obtained; preparation of the heteroatom doped graphene-based material supported noble metal nanoparticles: the heteroatom doped graphene-based material is dissolved in deionized water and subjected to ultrasonic treatment, a stabilizer and a metal precursor are added, metal in the metal precursor is platinum, palladium, gold or silver, the mixture is continuously stirred, pH is adjusted to range from 8 to 14, a reduction agent is added, the mixture is continuously stirred, and the heteroatom doped graphene-based material supported noble metal nanoparticles are obtained after vacuum drying. The synergistic effect of the heteroatom and the carrier on noble metal is used, the activity and the stability of a catalyst are effectively improved, and a preparation process is simple and suitable for industrial production and has higher economic value.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Method for synthesizing heterogeneous atom doped carbon material through one-step process
InactiveCN103787304AImprove adsorption capacitySimple preparation conditionsPhysical/chemical process catalystsCell electrodesOxygenComputational chemistry
The invention relates to a method for synthesizing a heterogeneous atom doped carbon material through a one-step process. The method comprises the following steps of uniformly dispersing a carbon material and a heterogeneous atom source into water and / or ethanol to obtain a mixed solution, and carrying out hydrothermal reaction at 120-200 DEG C for 12-48 hours to prepare the heterogeneous atom doped carbon material, wherein a heterogeneous atom comprises at least one of N, S, B, P and F. The heterogeneous atom doped carbon material prepared according to the method disclosed by the invention is doped with the heterogeneous atom, keeps the original properties of the carbon material, namely surface area, aperture distribution, crystal structure and the like are basically unchanged, has good oxygen reduction property, hydrogen storage property, carbon dioxide adsorption property and the like and can be used for the fields of fuel-cell catalysts, lithium batteries, supercapacitors, absorption, gas storage and the like.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Nickel-based positive electrode material, and preparation method thereof and battery
ActiveCN103094576AIncrease capacityImprove structural stabilityCell electrodesSecondary cellsMetallurgySlurry
The invention relates to a nickel-based positive electrode material, and a preparation method thereof and a battery. The composition of the nickel-based positive electrode material is LiaNibCocMndMeM'fO2-g / 2Fg (M is at least one selected from Ti, Zr, Al, Fe, Cr, Si, and Cu; M' is at least one selected from Mg, Ca, Sr, Ba, and W; a is no smaller than 0.95 and no greater than 1.2; b is no smaller than 0.2 and no greater than 0.9; c is no smaller than 0 and no greater than 0.4; d is no smaller than 0 and no greater than 0.4; e+f is greater than 0.05and no greater than 0.2; and g is greater than 0.02 and no greater than 0. 1). Anions and cations are used in co-doping. With a synergistic effect, nickel-based positive electrode material capacity, structural stability and circulation performance are greatly improved. The preparation method at least comprises the 4 steps that: (1) corresponding raw materials are weighed according to the molar ratio consistent with LiaNibCocMndMeM'fO2-g / 2Fg; (2) the raw materials are subjected to wet grinding; (3) slurry obtained by grinding is dried; and (4) the dried material is subjected to solid-phase synthesis under a temperature of 500-1100 DEG C. With the process, the raw materials can be more uniformly dispersed, and the obtained product has the advantages of high capacity and good circulation performance. The process is simple, and has the advantages of low cost and suitability for large-scale industrialized productions. With the process, problems such as complicated process and acid and alkali pollution of a wet chemical precursor preparation method are avoided. The invention also relates to a battery with the material as an active substance.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD
Method or growing N-Al co-blended p type ZnO transistor film by two step method
InactiveCN1588623AImprove crystal qualityHigh c-axis orientationVacuum evaporation coatingSputtering coatingOptoelectronicsReaction chamber
In the invention, magnetic control sputtering technology is used for growth of P-type ZnO crystal film. By the method, vacuum degree of reaction chamber is extracted to at least 4X10 to the power -3 pa, zinc-aluminium alloy that mass percent content is 0.1-0.3, NaO and O2 that purity is more than 99.99 percent are used as sputtering gas, the two gases are separately controlled by gas flomweter and mixed in buffer chamber, then are send to vacuum reaction chamber, under 3-5 Pa pressure, first step, substrate is heated to temp. 590-610 deg.C, a layer of N-Al codoped P type buffer film is deposited on the substrate, second step, the temp. of substrate is adjusted to 480-520 deg.C, then a layer of N-Al codoped P type ZnO crystal film is growth on the buffer layer. The crystal film produced by the invention has better doping uniformity, reproducibility, stability, super optical property and P type conducting characteristic.
Owner:ZHEJIANG UNIV
Preparation method of black phosphorus graphene composite material-loaded noble metal nanoparticles
ActiveCN107170998AEvenly distributedImprove electrochemical activityMaterial nanotechnologyFinal product manufactureFiltrationElectrochemistry
The invention provides a preparation method of black phosphorus graphene composite material-loaded noble metal nanoparticles. The method comprises the following steps: firstly, preparing a black phosphorus graphene composite material: carrying out ball-milling on a black phosphorus nanometer lamellar material and a graphene nanometer lamellar material under the protection of argon, then respectively washing products with ethanol and water, carrying out suction filtration to obtain the black phosphorus graphene composite material, carrying out vacuum drying on the obtained black phosphorus graphene composite material, and collecting; then, dispersing the black phosphorus graphene composite material into ethanol, carrying out ultrasonic treatment and then adding a stabilizer and a metal precursor; continuously carrying out ultrasonic agitation, adjusting a pH value to 9-11, then adding a reducing agent, continuously stirring, and carrying out vacuum drying to obtain the black phosphorus graphene composite material-loaded noble metal nanoparticles. According to the black phosphorus graphene composite material-loaded noble metal nanoparticles, a black phosphorus graphene composite material carrier is better combined with noble metal, so that the electro-chemical activity and stability of a fuel-cell catalyst are effectively improved; furthermore, a preparation technology is easy to operate, thus being suitable for large-scale production.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Preparation method of black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle
The invention provides a preparation method of a black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle. The preparation method comprises the steps of preparing a black phosphorus TiO2 heterojunction structure material, in which a black phosphorus nanosheet layer material and a TiO2 nanosheet layer material are ball-milled under argon protection, the black phosphorus nanosheet layer material and the TiO2 nanosheet layer material are respectively washed with ethanol and water, and the black phosphorus TiO2 heterojunction structure material is obtained by suction filtration, is dried in vacuum and is collected; and dispersing the black phosphorus TiO2 heterojunction structure material in the ethanol, adding a stabilizer and a metal precursor after ultrasonic processing, continuing to perform ultrasonic stirring, adjusting pH to 9-11, adding a reducing agent, continuing to stir, and obtaining the black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle after vacuum drying. The black phosphorus TiO2 heterojunction structure material carrier is combined with precious metal better, and the electrochemical activity and the stability of a fuel cell catalyst are effectively improved; and moreover, the preparation process is easy to operate and is suitable for production on a large scale.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Molybdenum and carbon-codoped titanium oxide nanotube array thin film material and preparation method thereof
InactiveCN103924280ACo-dopingImprove visible light absorptionMaterial nanotechnologyLayered productsPhotocatalytic degradationIon
The invention belongs to the technical field of an environmental material, and particularly relates to a molybdenum and carbon-codoped titanium oxide nanotube array thin film material and a preparation method thereof. The molybdenum and carbon codoping of a titanium oxide nanotube can be realized by introducing molybdenum element into the titanium oxide nanotube formed on a titanium sheet and the surface thereof through alloying, and then introducing carbon element through carbon monoxide atmospheric thermal treatment; in the obtained molybdenum and carbon-codoped titanium oxide nanotube array thin film material, a part of titanium atoms in the titanium oxide nanotube are replaced by molybdenum, a part of oxygen atoms are replaced by carbon, the ratio of the molybdenum atoms to carbon atoms ranges from 0.03 to 0.15, and the ratio of the doped carbon atoms to titanium atoms ranges from 0.01 to 0.09. The thin film material is attached to a titanium alloy substrate, and comprises orderly titanium oxide nanotubes perpendicular to the substrate. The photocatalysis and photo-electrochemical properties of the thin film material in visible light are far higher than those of the traditional titanium oxide thin film material, and the thin film material has excellent application prospects on the aspects of photocatalytically degrading organic matters in water and reducing heavy metal ions.
Owner:ZHANGJIAGANG GREEN TECH ENVIRONMENTAL PROTECTION EQUIP +1
Method for preparing self-doped Fe-N-C oxygen reduction electrocatalyst through animal blood salting-out thermal polymerization
ActiveCN108855179AIncrease the channelLarge specific surface areaCell electrodesCatalyst activation/preparationChloride potassiumChemistry
The invention discloses a method for preparing a self-doped Fe-N-C oxygen reduction electrocatalyst through animal blood salting-out thermal polymerization. The method comprises the following steps: performing salting-out thermal polymerization on animal blood to obtain a precursor, removing water in the precursor to crush, putting the crushed polymer powder under inert atmosphere to perform high-temperature thermolysis, and washing, and performing vacuum freeze-drying to obtain the self-doped Fe-N-C oxygen reduction electrocatalyst, wherein the salting-out thermal polymerization refers to separating out precipitates after adding salt into the animal blood, and adding the precipitates into water to boil, wherein the salt is sodium chloride or potassium chloride. The catalyst prepared by the method has excellent oxygen reduction and electro-catalytic performance.
Owner:QINGDAO UNIV
Carbon material, preparation method therefor and application of carbon material
ActiveCN110526227AImprove electrochemical performanceCo-dopingHybrid capacitor electrodesCell electrodesChemistryMacropore
The invention discloses a carbon material, a preparation method therefor and an application of the carbon material. The carbon material is ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon, wherein a catalyst has a thin-layer flake texture. The carbon material serves as a fuel cell cathode, the catalyst is a ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon redox catalyst, multistage-pore nano-carbon is doped with ferrum, nitrogen and sulfur elements, and multistage pores comprise micropores, mesopores and macropores. The carbon material has efficient redox catalysis performance and can be applied to air electrode catalysts of hydrogen-oxygen fuel cells, zinc-air fuel cells, magnesium-air fuel cells and aluminum-air fuel cells.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Preparation method of nickel nitride graphene composite material-loaded previous metal nanoparticle
InactiveCN108598510AEvenly distributedImprove electrochemical activityCell electrodesFuel cellsNitride
The invention provides a preparation method of nickel nitride graphene composite material-loaded previous metal nanoparticle. The preparation method comprises the steps of preparing a nickel nitride graphene composite material; respectively washing a nickel nitride nanosheet and a graphene nanosheet layer material with ethyl alcohol and water after ball-milling under argon protection, performing filtering to obtain the nickel nitride graphene composite material, and performing vacuum drying and collection; and dispersing the nickel nitride graphene composite material in the ethyl alcohol, adding a stabilizing agent and a metal precursor after ultrasonic treatment, continuing to perform ultrasonic stirring, adjusting pH to be 9-11, adding a reducing agent, continuing to stir, and obtainingthe nickel nitride graphene composite material-loaded previous metal nanoparticle after vacuum drying. The nickel nitride graphene composite material carrier is combined very well with previous metal,the electrochemical activity and the stability of a fuel cell catalyst are effectively improved, and moreover, the preparation process is easy to operate and is suitable for mass production.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Method for preparing rare earth-doped quartz glass microstructure optical fibers by laser melting technology
The invention discloses a method for preparing rare earth-doped quartz glass microstructure optical fibers by a laser melting technology. The method comprises the following steps of powder preparation, melting, doped rod treatment and optical fiber precast rod preparation, and rare earth-doped quartz glass microstructure optical fiber drawing. The invention discloses a use of the uniformly doped quartz glass rod in an all solid state laser and a microstructure optical fiber. The invention discloses a laser melting system. The laser melting system comprises a powder feeding device, a laser source, a mother rod, a clamp, a motor and a guide rail. The prepared rare earth-doped powder and the quartz glass microstructure optical fibers realize uniform doping of a plurality of rare earth ions. The prepared doped microstructure optical fibers have a rare earth ion effective-doping concentration more than 10000ppm.
Owner:SOUTH CHINA NORMAL UNIVERSITY +1
Preparation method of lithium and nitrogen co-doped diamond film
InactiveCN103952681AShallow donor levelEnhanced Electron MobilityChemical vapor deposition coatingChemistryDiamond thin film
The invention discloses a preparation method of a lithium and nitrogen co-doped diamond film. The preparation method comprises the following steps: coating a layer of suspension liquid containing a lithium source on the surface of a substrate on which a diamond film is pre-deposited; after drying, putting into a reaction chamber of a heater chemical vapor deposition system, heating in a hydrogen atmosphere to melt powder containing the lithium source and allowing lithium to be dispersed in diamond; subsequently further depositing the lithium and nitrogen co-doped diamond film in a nitrogen-containing atmosphere by adopting a heater chemical vapor deposition method. The lithium and nitrogen co-doped diamond film has low surface work function, is liable to emit electrons under the effect of heat and the effect of an electric field, and can be applied to thermo-electron energy transforming components and field emission display components.
Owner:NANJING UNIV OF SCI & TECH
Topological chemical reduction Eu < 3 + >/Eu < 2 + > co-doped UV-LED white light microcrystalline glass and preparation method thereof
The invention discloses topological chemical reduction Eu < 3 + > / Eu < 2 + > co-doped UV-LED white light microcrystalline glass and a preparation method thereof. The topological chemical reduction Eu < 3 + > / Eu < 2 + > co-doped UV-LED white light microcrystalline glass is prepared from, by mole, 40%-60% of SiO2, 10%-25% of Al2O3, 10%-20% of Na2CO3, 8%-15% of YF3, 6%-15% of NaF, 0.1%-0.5% of Eu2O3 and 0.02%-0.1% of a reducing agent, the reducing agent is nitride or carbide, all the raw material components are mixed and ground according to the set proportion, and melting and annealing are carried out to obtain the white light microcrystalline glass. According to the invention, a high-temperature solid-phase melting reaction is directly carried out in air, Eu < 3 + > is partially reduced in situ by using a nitride or carbide reducing agent so as to realize co-doping of Eu < 3 + > and Eu < 2 + >, and white light is generated under excitation of 395nm ultraviolet, so that the white-light microcrystalline glass is obtained.
Owner:XIANGTAN UNIV
Catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as preparation method and application of catalyst
ActiveCN113522288AImprove catalytic performanceLower synthesis costReversible hydrogen uptakeCatalyst activation/preparationPtru catalystCarbonization
The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as a preparation method and application of the catalyst. The phosphorus-and-copper co-doped cobalt oxide composite material catalyst is prepared by taking a ZIF-67 zeolite imidazate framework structure material as a precursor and performing carbonization doping with Cu and P elements, wherein active components are Cu, Co, O and P elements, and the catalyst is marked as P-Cu-Co3O4@C. The catalyst shows excellent catalytic activity in the reaction of hydrogen production through hydrolysis of ammonia borane, catalytic activity can reach 111.06 mol H2.mol<-1> cat. min<-1 >, apparent activation energy is 38.31 kJ / mol, and 68% of catalytic activity is kept after five times of cyclic catalytic reaction. The catalyst is simple in preparation process and low in cost, raw materials are easy to obtain, and the catalyst has wide application prospects. Meanwhile, the anion-cation co-doping method also provides a new thought for design and synthesis of the high-performance catalyst.
Owner:FUDAN UNIV
Preparation method of N/S doubly doped metallic carbon compound material
ActiveCN107093723AImprove cycle stabilitySimple preparation processCell electrodesSecondary cellsIonTube furnace
The invention provides a preparation method of an N / S doubly doped metallic carbon compound material. The preparation method comprises the following steps: preparing an organic complex material, namely dissolving dithizone in ethanol, then adding a metal atom precursor, wherein the molar ratio of a dithizone organic ligand to the metal atom precursor is (1-4):1, stirring the mixed solution at the temperature of 30-85 DEG C, and then drying; and then preparing the N / S doubly doped metallic carbon compound material, namely putting the organic complex obtained after drying into a tubular furnace, carrying out heat preservation for 1-12 hours at the temperature of 400-900 DEG C under the nitrogen protection condition, then cooling to room temperature, then carrying out acid pickling, finally activating according to the mass ratio of the material to potassium hydroxide of 1:(2-6), and then washing to be neutral with deionized water, so that the N / S doubly doped metallic carbon compound material is obtained. The preparation method provided by the invention has the advantages that a strong oxidation bridge effect among metal, carbon and hetero atoms is combined, and electrochemical properties of the metallic carbon compound material are effectively improved.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Zn/N double-doped titanium monoxide material and preparation method thereof
ActiveCN111558388ACo-dopingImprove photocatalytic performancePhysical/chemical process catalystsEnergy inputZinc nitrateTitanium oxide
The invention relates to a Zn / N double-doped titanium monoxide material and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving polyacrylonitrile in N, N-dimethylformamide, adding titanium dioxide, performing stirring, and then adding zinc nitrate and stirring together; and (2) heating until the liquid is completely volatilized, carrying out high-temperature treatment on the obtained solid under the condition of ammonia gas, and cooling to obtain the Zn / N double-doped titanium monoxide material. Compared with the prior art, the Zn / N co-doped metaloxide material has the advantage that the photocatalytic performance of the Zn / N co-doped metal oxide material is effectively improved by combining the strong oxidation bridge effect among the metaloxide, carbon and heteroatoms.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Filter screen usable for air purifier and preparation method of filter screen
ActiveCN109569100AReduce component countImprove adsorption capacityDispersed particle filtrationFiltration separationSODIUM DODECYL BENZENE SULFONATEMicro spheres
The invention discloses a filter screen usable for an air purifier and a preparation method of the filter screen. The filter screen comprises a substrate layer and an activity layer, the substrate layer is provided with a modified foam nickel screen coated with a carbon micro-sphere coating, and the activity layer is provided with TiO2 co-doped Pt, Ag, N and F. The preparation method of the filterscreen includes the steps: firstly, performing reaction on the foam nickel screen in sugar solution, and performing drying and roasting to obtain the substrate layer; secondly, soaking the substratelayer into mixed solution of ammonium fluorotitanate, urea and deionized water to perform reaction, drying and roasting to obtain the filter screen with the surface with N and F co-doped TiO2 coatings; dissolving chloroplatinic acid and silver nitrate in distilled water, stirring mixture for 30 minutes at room temperature, adding sodium dodecyl benzene sulfonate to continue to stir mixture for 30minutes, and dripping sodium borohydride solution into solution to obtain impregnation liquid; soaking the filter screen with the surface with N and F co-doped TiO2 coatings into the impregnation liquid to perform reaction and drying to obtain the filter screen. The filter screen is small in air resistance and good in catalytic performance.
Owner:苏州科佳环境科技有限公司
Method for preparing rare earth doped silica glass microstructure optical fiber by laser melting technology
ActiveCN104591535BEvenly dopedLow hydroxyl contentGlass making apparatusRare earth ionsMicrostructure fiber
The invention discloses a method for preparing a rare earth-doped quartz glass microstructure optical fiber by adopting laser melting technology. In the method, the steps include: powder making, smelting, treatment of doped rods, preparation of optical fiber prefabricated rods, and drawing of rare earth-doped quartz glass microstructure optical fibers. Also disclosed is the application of uniformly doped quartz glass rods in all solid-state lasers and microstructured optical fibers. Also disclosed is a laser smelting system, which includes a powder feeder, a laser light source, a mother bar, a fixture, a motor, and a guide rail. The rare earth doped powder and quartz glass microstructure optical fiber prepared by the invention can realize uniform doping of various rare earth ions, and the doped microstructure optical fiber prepared by the invention has an effective doping concentration of rare earth ions exceeding 10000ppm.
Owner:SOUTH CHINA NORMAL UNIVERSITY +1
A kind of filter screen that can be used for air purifier and preparation method thereof
ActiveCN109569100BReduce component countImprove adsorption capacityDispersed particle filtrationFiltration separationMicrosphereMaterials science
The invention discloses a filter screen usable for an air purifier and a preparation method of the filter screen. The filter screen comprises a substrate layer and an activity layer, the substrate layer is provided with a modified foam nickel screen coated with a carbon micro-sphere coating, and the activity layer is provided with TiO2 co-doped Pt, Ag, N and F. The preparation method of the filterscreen includes the steps: firstly, performing reaction on the foam nickel screen in sugar solution, and performing drying and roasting to obtain the substrate layer; secondly, soaking the substratelayer into mixed solution of ammonium fluorotitanate, urea and deionized water to perform reaction, drying and roasting to obtain the filter screen with the surface with N and F co-doped TiO2 coatings; dissolving chloroplatinic acid and silver nitrate in distilled water, stirring mixture for 30 minutes at room temperature, adding sodium dodecyl benzene sulfonate to continue to stir mixture for 30minutes, and dripping sodium borohydride solution into solution to obtain impregnation liquid; soaking the filter screen with the surface with N and F co-doped TiO2 coatings into the impregnation liquid to perform reaction and drying to obtain the filter screen. The filter screen is small in air resistance and good in catalytic performance.
Owner:苏州科佳环境科技有限公司
A kind of nickel-based positive electrode material and its preparation method and battery
ActiveCN103094576BIncrease capacityImprove structural stabilityCell electrodesSecondary cellsMetallurgyElectrical battery
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD
Boron-nitrogen co-doped carbon nanotube film and preparation method and application thereof
InactiveCN110858535ASimple processLow costMaterial nanotechnologySemiconductor/solid-state device manufacturingCapacitanceFerrocene
The invention discloses a boron-nitrogen co-doped carbon nanotube film and a preparation method and application thereof. The preparation method comprises the following steps of: 1) weighing ethanol, ferrocene and thiophene according to a mass ratio of (90-100): (1.3-1.7): (0.5-1.5) to obtain a mixed solution, adding 1-3wt% of boric acid and 2-4wt% of pyridine into the mixed solution, and uniformlydispersing at 40-60 DEG C to obtain a precursor solution, 2) completely sealing a CVD furnace, continuously introducing inert gas to remove air in the furnace, adjusting the temperature of the CVD furnace to 1100-1200 DEG C, and keeping the temperature for 2-5 hours to provide a constant-temperature environment for subsequent growth of the carbon nanotube film, 3) closing the inert gas, continuously introducing H2 as a reaction gas until the whole hearth is filled with H2, injecting the precursor solution obtained in the step 1 into the furnace at a liquid injection rate of 3-8 mL / h by virtueof an ultrasonic atomization device in a uniformly dispersed vaporific droplet manner, and collecting the boron-nitrogen co-doped carbon nanotube film at the bottom of the hearth after 10-30min. Andthe mass specific capacitance of the film is 130-150 F.g<-1>.
Owner:TIANJIN UNIV
A kind of preparation method of lithium nitrogen co-doped diamond film
InactiveCN103952681BDoping achievedCo-dopingChemical vapor deposition coatingGas phaseHydrogen atmosphere
The invention discloses a preparation method of a lithium and nitrogen co-doped diamond film. The preparation method comprises the following steps: coating a layer of suspension liquid containing a lithium source on the surface of a substrate on which a diamond film is pre-deposited; after drying, putting into a reaction chamber of a heater chemical vapor deposition system, heating in a hydrogen atmosphere to melt powder containing the lithium source and allowing lithium to be dispersed in diamond; subsequently further depositing the lithium and nitrogen co-doped diamond film in a nitrogen-containing atmosphere by adopting a heater chemical vapor deposition method. The lithium and nitrogen co-doped diamond film has low surface work function, is liable to emit electrons under the effect of heat and the effect of an electric field, and can be applied to thermo-electron energy transforming components and field emission display components.
Owner:NANJING UNIV OF SCI & TECH
Preparation process of single/multi-element doped sodium titanate nanorod array coating
ActiveCN109568655BSimple ingredientsEasy to controlPharmaceutical delivery mechanismMetallic material coating processesOsseointegrationSodium titanate
The invention discloses a preparation process of single / multiple-element doped sodium titanate nanorod array coatings. The preparation process is characterized by adopting a hydrothermal (HT) method to prepare different sodium titanate nanorod array coatings on the surface of pure titanium, performing hydrothermal treatment on the coatings again, and achieving single / multiple-element (Mg, Ca, Sr or Zn) doping of nanorod-like sodium titanate in the coatings. The coatings are of double-layer structures and are characterized in that inner layers adjacent to a substrate are dense nanoparticle layers; surface layers are nanorods and are orientated to be nearly perpendicular to the dense nanoparticle layers; no discontinuous interfaces exist between the coatings and the substrate; and the coatings have high bonding strength being 21.0-30.2 N, can be rapidly induced to form bonelike apatite in simulated body fluid environment, and have good biological activity. According to the invention, thepure titanium substrate is subjected to bonelike surface modification from structures and components with reference to human bone; micro-nano structures and trace elements are given to the surfaces of implants; and through synergistic effects of the micro-nano structures and the trace elements, the bone integration effect is improved.
Owner:XI AN JIAOTONG UNIV
Hydroxyapatite nanorod array structured coating co-doped with multiple elements on titanium-based surface and its preparation method and application
ActiveCN109385658BSimple ingredientsEasy to controlSurface reaction electrolytic coatingTissue regenerationTitanium surfaceOsseointegration
The invention belongs to the technical field of titanium-based surface treatment, and specifically relates to a titanium-based surface multi-element co-doped hydroxyapatite nanorod array configurational coating, a preparation method and the application thereof. A micro-arc oxidation-hydrothermal treatment compound method is used, an HA nanorod array configurational coating in which three elementsof strontium, zinc and magnesium are doped is prepared on the surface of pure titanium, and co-doping of five elements such as Sr, Zn, Mg, Si and C of nanorod-like HA in a coating array is realized bycarrying out second hydrothermal treatment method on the coating. The preparation method is simple in technology and low in production cost, the obtained rod-like hydrothermal treatment gets closer to the bionic component of human bone, the coating can be quickly induced in an environment similar to a body fluid to form bone apatite, and the coating has good biological activity. The coating in combination with a micro-nano structure and biological activity elements preferably stimulates a synergetically enhanced biological effect, a novel design thought is provided for the surface modification of a metal implant, and the coating is significant for efficiently promoting osseointegration.
Owner:XI AN JIAOTONG UNIV
A kind of carbon material and its preparation method and application
ActiveCN110526227BImprove electrochemical performanceCo-dopingHybrid capacitor electrodesCell electrodesPtru catalystFuel cells
The invention discloses a carbon material, a preparation method therefor and an application of the carbon material. The carbon material is ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon, wherein a catalyst has a thin-layer flake texture. The carbon material serves as a fuel cell cathode, the catalyst is a ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon redox catalyst, multistage-pore nano-carbon is doped with ferrum, nitrogen and sulfur elements, and multistage pores comprise micropores, mesopores and macropores. The carbon material has efficient redox catalysis performance and can be applied to air electrode catalysts of hydrogen-oxygen fuel cells, zinc-air fuel cells, magnesium-air fuel cells and aluminum-air fuel cells.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
A preparation method of heteroatom-doped graphene-based material loaded noble metal nanoparticles
ActiveCN105591115BCo-dopingHigh catalytic activityMaterial nanotechnologyCell electrodesPlatinumDoped graphene
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Method or growing N-Al co-blended p type ZnO transistor film by two step method
InactiveCN1293606CCo-dopingImprove crystal qualityVacuum evaporation coatingSemiconductor/solid-state device manufacturingSputteringOptical property
In the invention, magnetic control sputtering technology is used for growth of P-type ZnO crystal film. By the method, vacuum degree of reaction chamber is extracted to at least 4X10 to the power -3 pa, zinc-aluminium alloy that mass percent content is 0.1-0.3, NaO and O2 that purity is more than 99.99 percent are used as sputtering gas, the two gases are separately controlled by gas flomweter and mixed in buffer chamber, then are send to vacuum reaction chamber, under 3-5 Pa pressure, first step, substrate is heated to temp. 590-610 deg.C, a layer of N-Al codoped P type buffer film is deposited on the substrate, second step, the temp. of substrate is adjusted to 480-520 deg.C, then a layer of N-Al codoped P type ZnO crystal film is growth on the buffer layer. The crystal film produced by the invention has better doping uniformity, reproducibility, stability, super optical property and P type conducting characteristic.
Owner:ZHEJIANG UNIV
Preparation method of self-doped Fe-n-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood
ActiveCN108855179BReduce pollutionReduce air pollutionCell electrodesCatalyst activation/preparationPtru catalystFreeze-drying
The invention discloses a method for preparing a self-doped Fe-N-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood. The precursor is obtained by salting out thermal polymerization of animal blood, and the moisture in the precursor is removed for crushing. The pulverized polymerized The powder of the material is placed under an inert atmosphere for high-temperature pyrolysis, and then washed and vacuum freeze-dried to obtain a self-doped Fe-N-C oxygen reduction electrocatalyst; wherein, the salting-out thermal polymerization is directed to animal blood After adding salt, the precipitate is precipitated, and then the precipitate is added to the water and boiled. The salt is sodium chloride or potassium chloride. The catalyst prepared by the invention has excellent electrocatalytic performance for oxygen reduction.
Owner:QINGDAO UNIV
Preparation method of self-absorption nitrogen-sulfur doped porous carbon
InactiveCN108373154ACo-dopingEvenly distributedCarbon compoundsAlkali orthophosphate fertiliserPorous carbonAbsorption effect
According to the invention, porous carbon heteroatom doping is realized by a self-absorption manner, wherein self-absorption is specifically shown in a manner that heteroatom doping is combined with material preparation, specifically, a simple and easily-available biomass material is selected as a reaction precursor so as to provide a carbon source; meanwhile, the difference from the prior art isthat: according to the application, heteroatom doping is compounded into the biomass growth process, that is, in the biomass growth process, by the capillary absorption effect, doping atom is synchronously absorbed into the biomass body while the biomass absorbs nutrient substances, so as to obtain a biomass material rich in heteroatom; and by processing the biomass material, the doped porous carbon can be obtained by one step, without the need of separate doping subsequently, and therefore, on one hand, saving of process and energy consumption are benefited, and on the other hand, uniform controllable doping of the heteroatom can be realized.
Owner:王干
A preparation method of black phosphorus titanium dioxide heterogeneous structure material loaded noble metal nanoparticles
The invention provides a preparation method of a black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle. The preparation method comprises the steps of preparing a black phosphorus TiO2 heterojunction structure material, in which a black phosphorus nanosheet layer material and a TiO2 nanosheet layer material are ball-milled under argon protection, the black phosphorus nanosheet layer material and the TiO2 nanosheet layer material are respectively washed with ethanol and water, and the black phosphorus TiO2 heterojunction structure material is obtained by suction filtration, is dried in vacuum and is collected; and dispersing the black phosphorus TiO2 heterojunction structure material in the ethanol, adding a stabilizer and a metal precursor after ultrasonic processing, continuing to perform ultrasonic stirring, adjusting pH to 9-11, adding a reducing agent, continuing to stir, and obtaining the black phosphorus TiO2 heterojunction structure material loaded precious metal nanoparticle after vacuum drying. The black phosphorus TiO2 heterojunction structure material carrier is combined with precious metal better, and the electrochemical activity and the stability of a fuel cell catalyst are effectively improved; and moreover, the preparation process is easy to operate and is suitable for production on a large scale.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
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