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66results about How to "Good shape controllability" patented technology
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Preparation method of nickel-cobalt layered bimetallic hydroxide/graphene electrocatalyst
ActiveCN107824188ASimple processOvercoming demandsCatalyst activation/preparationMetal/metal-oxides/metal-hydroxide catalystsNickel saltSynthesis methods
The invention provides a preparation method of a nickel-cobalt layered bimetallic hydroxide / graphene electrocatalyst, which belongs to the technical field of electrocatalysts. The method disclosed bythe invention comprises the following steps: graphene and cobalt nitrate are uniformly dispersed in a methanol solvent by ultrasonic waves, so that an ultrasonic solution is obtained; the ultrasonic solution is added into a methanol solution of dimethylimidazole, is uniformly mixed and then is enabled to stand, and centrifuging, washing and drying are then carried out, so that a ZIF-67 / graphene composite material is obtained; the ZIF-67 / graphene composite material and nickel salt are mixed and dissolved in a solvent, refluxing is carried out for reaction, centrifugal separation is then carriedout, obtained precipitate is washed with absolute ethyl alcohol, and drying is carried out to obtain a NiCo LDH / G composite material with a nanoscale morphology. The method disclosed by the inventionovercomes the defects of high requirement on equipment, need for high temperature and high pressure and need for an expensive surfactant existing in conventional synthesis methods, and compared withthe prior art, the preparation method has the advantages of simple process, low cost, easy reaction process control and the like, and is suitable for industrial mass production.
Owner:GUANGXI NORMAL UNIV
Glass structure and method for producing the same
InactiveUS7217448B2Easy to processGood shape controllabilityLayered productsGlass reforming apparatusAbsorbed energyCerium
A limited portion of a surface of a glass substrate is removed by application of a laser beam on the limited portion of the glass substrate to thereby produce a glass structure according to the invention. The glass substrate contains at least one element such as titanium, iron, vanadium, bismuth, lead, thallium, tin, cerium, rhodium or cobalt capable of absorbing energy of the laser beam and has a threshold of not larger than 1.0 J / cm2 per laser beam pulse in terms of machining energy of the laser beam. When such a glass substrate 21 is used, a glass structure having a through-hole 61 or cavity optional in sectional shape can be formed by irradiation with the laser beam 10.
Owner:NIPPON SHEET GLASS CO LTD
Static synthesis method of aniline-sulfoacid aniline copolymer nano-fiber
The invention provides a static synthesis method of aniline-sulfoacid aniline copolymer nano-fiber, belonging to the technical field of conducting polymer material. The invention solves the problems that the traditional polymerization method of preparing the conducting polyaniline nano-fiber needs an additional template, has complicated after-treatment processes, pollutes the environment by the used solvent, produce less polymers, is not suitable for mass production, and the like. In the invention, the aniline and the sulfoacid aniline are used as monomers, and the static chemical oxidation polymerization implementation method is used for preparing the polyaniline nano-fiber. The method can be used for preparing the polyaniline nano-fiber which is 30-95nm in diameter and 1.6 micrometers in length. The method of the invention has the characteristics of simple operation, high yield and low cost, belongs to the aqueous system and does not relate to organic solvents, is an environment-friendly method of synthesizing the polyaniline nano-fiber, and provides a new way for synthesizing the polyaniline nano-fiber.
Owner:FUZHOU UNIV
Magnetic iron-oxide nanoparticle covering method using silicon dioxide
InactiveCN104078229ASimple processRaw materials are easy to getInorganic material magnetismInductances/transformers/magnets manufactureWater basedSurface-active agents
The invention relates to a magnetic iron-oxide nanoparticle covering method using silicon dioxide and belongs to the technical field of nano material preparation. The magnetic iron-oxide nanoparticle covering method using the silicon dioxide mainly comprises preparing water-soluble magnetic iron-oxide nanoparticles through a known method; adding appropriate surface modifier into water base dispersion liquid to form into stable water base dispersion liquid; adding simple substance metal silica powder into the water base dispersion liquid, heating and stirring, enabling the silica powder to hydrolyze under catalysis of alkaline substance to generate into silicon dioxide to be deposited on surfaces of the magnetic iron-oxide nanoparticles and obtaining the silicon dioxide covered magnetic iron-oxide nanoparticles. The magnetic iron-oxide nanoparticle covering method using the silicon dioxide has the advantages of being simple in preparation technology, green and environmental friendly, easily available in material and low win cost and achieving large-scale industrialized production due to the fact that organic solvent and surface active agent are not required in the preparation process and the covering reaction is performed in water solution; enabling obtained products to be strong in morphology controllability, high in purity degree and particularly suitable for biomedical application; being widely applied to silicon dioxide covering of other nanocrystallines such as quantum dots and precious metal nano particles.
Owner:QINGDAO UNIV OF SCI & TECH
Sea-urchin-shaped gold nano particles and synthesis method thereof
InactiveCN110039068AEnhancement effect is goodSynthesis conditions are simpleMaterial nanotechnologyTransportation and packagingRough surfaceNanoparticle
The invention belongs to the technical field of nano material preparing. A sea-urchin-shaped gold nano particle synthesis method comprises the following steps that firstly, a soluble silver source anda soluble gold source are evenly mixed, a weak reducing agent is rapidly added, stirring is conducted for a certain time, and a silver / gold seed with the rough surface is obtained; and secondly, thesilver / gold seed and a certain number of gold sources are mixed, and after stirring is conducted for 20 s, centrifugal separation is conducted, the mixture is scattered into deionized water again, andsea-urchin-shaped gold nano particles are obtained. By means of the method, the sea-urchin-shaped gold nano particles high in yield and adjustable in particle size and surface spine density, length and width can be obtained. The gold nano particles with different spine structures have different ultraviolet-visible absorption spectra, and adjustable red shift of an LSPR peak can be shown. In addition, the gold nano particles, namely the sea-urchin-shaped gold nano particles different in spine structure can have different degrees of enhancing functions on raman signals. The method has good application potentials on surface enhanced raman scattering.
Owner:NANJING UNIV OF TECH
Method for preparing zinc oxide/epoxy resin composite voltage dependent resistor
ActiveCN104616850ASimple processEasy to operateResistor manufactureConductive channelEpoxy resin composite
The invention relates to a method for preparing a zinc oxide / epoxy resin composite voltage dependent resistor, and belongs to the technical field of electric materials. The method comprises the following steps: firstly, by taking ZnO as a main raw material, adding a small amount of Bi2O3, MnO2, Sb2O3, Co2O3, SiO2 and Cr2O3 according to a ratio, uniformly mixing, performing spray granulation so as to obtain microspheres, and sintering at high temperature so as to form voltage dependent resistor microspheres; uniformly commixing epoxy resin components A and B and the voltage dependent resistor microspheres according to a certain ratio under certain temperature conditions, and removing bubbles in vacuum; injecting the mixture into a mold with an electrode, standing for a certain period of time under the action of an alternative-current electric field, putting into an oven to heat, and taking out from the mold after being cured. According to the method provided by the invention, stable and effective chain-shaped conductive channels are formed in the microspheres inside the voltage dependent resistor under the action of the electric field by virtue of the small-bridge effect, molds with different electrode shapes can be adopted to form composite voltage dependent resistors of various shapes under a relatively low temperature condition, the use amount of oxides such as zinc oxide can be reduced, and the cost is also lowered.
Owner:TSINGHUA UNIV
Plasma processing apparatus and plasma processing method
ActiveUS20160133530A1Improve stabilityGood shape controllabilityLiquid surface applicatorsSemiconductor/solid-state device testing/measurementPlasma impedanceEngineering
A plasma processing apparatus includes a processing chamber configured to perform a plasma processing on a sample, a first radio frequency power supply configured to generate a plasma, a sample stage configured to place the sample thereon, a second radio frequency power supply configured to supply a radio frequency power to the sample stage, a mass flow controller configured to supply a gas into the processing chamber, and a control device configured to change the radio frequency power supplied from the first radio frequency power supply or the second radio frequency power supply based on a change of plasma impedance after a first gas is switched to a second gas.
Owner:HITACHI HIGH-TECH CORP
Zinc oxide nano-sheet cluster and preparation method thereof
ActiveCN105293563AHigh yieldSmall size dispersionMaterial nanotechnologyZinc oxides/hydroxidesControllabilityAqueous solution
The invention discloses a zinc oxide nano-sheet cluster and a preparation method thereof. The preparation method comprises the following steps: a zinc salt water solution is subjected to a reaction with an alkali solution, such that a water solution of Zn(OH)4<2-> is obtained; (2) the Zn(OH)4<2-> water solution obtained in the step (1) is subjected to a precipitation reaction in deionized water; a precipitate is collected when the reaction is finished; and the precipitate is dried, such that the zinc oxide nano-sheet clusters are obtained. The zinc oxide nano-sheet cluster preparation method provided by the invention has the advantages of low cost and high yield. The method has a simple process, and does not need high-temperature heating and the addition of a complexing agent. The product has good morphology controllability. With the method, nano-sheet clusters with single morphology and low size dispersion degree can be prepared. The method is suitable for industrialized productions.
Owner:TSINGHUA UNIV +1
Method for preparing oil-soluble hydroxyapatite nanometer particles based on nonaqueous system
ActiveCN107746046AAbundant and easy to obtainLow costMaterial nanotechnologyPhosphorus compoundsPhosphateFatty acid
The invention relates to a method for preparing oil-soluble hydroxyapatite nanometer particles based on a nonaqueous system. Soluble calcium salts are dissolved into glycol to obtain a solution A; soluble alkali is dissolved into glycol to obtain a solution B; the solution A, propylene glycol or propanol, fatty acid and the solution B are added into a three-opening flask to be mixed and stirred; asolution C is obtained; soluble phosphate is dissolved into glycol to obtain a solution D; the solution D is dripped into the solution C; stirring is performed to obtain a mixed solution; the temperature of the mixed solution is raised to 80 to 160 DEG C; reaction is performed for 3 to 24 hours; cooling is performed to reach room temperature to obtain reaction liquid; the reaction liquid is subjected to centrifugal separation to obtain precipitates; absolute ethyl alcohol and cyclohexane are used for alternate centrifugal washing to obtain the oil-soluble hydroxyapatite nanometer particles. The method has the advantages that the raw materials are rich in resource and can be easily obtained; the cost is low; a synthesis process is simple; the process repeatability is high; the product quality is stable; the appearance controllability is good; the dispersivity is good; the method can be widely applied to the fields of biomedical materials, coating materials and the like.
Owner:HUBEI UNIV OF TECH
Preparation method of Mn3O4 self-assembly structure
InactiveCN104261476ALow priceEasy to makeMaterial nanotechnologyManganese oxides/hydroxidesSodium acetatePolyol
The invention discloses a preparation method of a Mn3O4 self-assembly structure. The method comprises the following steps: adding bivalent manganese salt and sodium acetate to a mixture of polyhydric alcohols and water, and stirring the mixture to obtain a transparent solution; heating the transparent solution to 170-220 DEG C, and preparing the Mn3O4 self-assembly structure by adopting a solvothermal method; and centrifugally separating and washing to obtain the Mn3O4 array- or flower-shaped self-assembly structure after reaction. The Mn3O4 three-dimensional self-assembly structure is synthesized in one step by using the solvothermal method, thus the Mn3O4 self-assembly structure is simple in preparation process, cheap in raw materials, low in production cost, strong in shape controllability and good in repeatability, and has great significance in large-scale industrial production and practical application of the Mn3O4 three-dimensional structure (a rod-like self-assembly array-shaped structure or a self-assembly flower-shaped structure); and the obtained three-dimensional structure is high in yield, can be applied to the field of lithium ion batteries and has a good development prospect.
Owner:UNIV OF JINAN
Method for preparing nano-structure aniline-co-pyrrole copolymer microsphere
InactiveCN101690880AUniform sizeGood shape controllabilityMicroballoon preparationMicrocapsule preparationMicrosphereConductive polymer
The invention provides a method for preparing nano-structure aniline-co-pyrrole copolymer microsphere, belongs to the technical field of high polymer materials, and solves the problems of impure obtained polymer, complicated post-processing process, environmental pollution of the used solvent, difficult industrial production and the like in the prior polymerizing method for preparing the nano-structure conductive polymer microsphere produces due to the adding of an extra template or massive additives. The copolymer is prepared by changing medium types of polymerization, selecting aniline or N-ethyl aniline and pyrrole as monomers and implementing a static chemical oxidation polymerization method. The method can prepare copolymer microspheres of between 400 nanometers and 4.4 microns. The method has the characteristics of simple operation, high yield and low cost. The prepared copolymer microspheres have excellent characteristics of nano materials. Furthermore, as an aqueous system, the method, which avoids organic solvent, is a green method for synthesizing the copolymer microspheres. The invention provides a new approach for preparation of the nano-structure polymer microspheres.
Owner:FUZHOU UNIV
Method for preparing surface medicinal coating of gastric tube
The invention discloses a method for preparing a surface medicinal coating of a gastric tube by high-voltage electrostatic spinning spraying. The method is characterized in that a biodegradable nano-fiber membrane and medicinal microspheres are arranged on the surface of the gastric tube; the medicinal microspheres are dispersed among nanofibers, and are fixed by the three-dimensional structure of the nanofibers. The catheter is simple in preparation and low in cost; the gastric tube surface medicinal coating is uniform, can be degraded along with the nanofiber membrane, and can gradually release drug molecules. The preparation process of the catheter comprises the following steps: respectively preparing a medicinal electrostatic spraying solution and a high-molecular polymer / organic solvent mixed electrostatic spinning solution; respectively performing high-voltage electrostatic spraying and high-voltage electrostatic spinning by the two solutions, and receiving the solutions on the same receiving roller with the gastric tube; leading the organic solvent to completely volatize to obtain the gastric tube with a surface medicinal coating.
Owner:JIANGNAN UNIV
Silicon dioxide nanofiber/polyimide composite aerogel as well as preparation method and application thereof
The invention relates to silicon dioxide nanofiber / polyimide composite aerogel and a preparation method and application thereof, and solves the technical problems that existing SiO2 aerogel is fragile and poor in flexibility. According to the silicon dioxide nanofiber / polyimide composite aerogel provided by the invention, silicon dioxide nanofibers are interpenetrated and staggered to form a three-dimensional network structure, and effective bonding is formed among the fibers through polyimide crosslinking. The invention also provides a preparation method and application thereof. The invention can be used in the field of thermal insulation materials.
Owner:BEIJING UNIV OF CHEM TECH
Porous CoAl bimetal hydroxide@carbon fabric composite electrode material and preparation method thereof
InactiveCN108666148AImprove cycle stabilityStrong mechanical flexibilityMaterial nanotechnologyHybrid capacitor electrodesCoalSodium hydroxide
The invention discloses a porous CoAl bimetal hydroxide@carbon fabric composite electrode material and a preparation method thereof. The preparation method comprises the steps of firstly, preparing aCo salt and Al salt mixed solution, and adding urea and ammonium fluoride for stirring and mixing; secondly, immersing the processed carbon fabric into the mixed solution, and obtaining a CoAl hydroxide loaded on the carbon fabric by hydrothermal reaction; and finally, immersing the CoAl hydroxide loaded on the carbon fabric into (0.1-0.3)mol / L of sodium hydroxide solution for normal-temperature immersion and etching to obtain the composite electrode material. The porous CoAl bimetal hydroxide@carbon fabric composite electrode material obtained by the method has favorable specific capacitancevalue and is good in cycle stability, the mechanical strength and the flexibility of the electrode are good, certain development guidance is provided for an intelligent, convenient, light and flexibleelectronic product which is constantly searched in modern science and technology, and the electrode material is one of energy materials with great development in future.
Owner:SHANGHAI INST OF TECH
Direct-writing molded SiCw/SiC composite material and preparation method thereof
InactiveCN110330348AMaintain print stabilityShort molding cycleAdditive manufacturing apparatusCross-linkOrganic solvent
The invention discloses a direct-writing molded SiCw / SiC composite material and a preparation method thereof. The preparation method includes: adding PCS and SiCw into an organic solvent, adding an ester dispersant, and conducting ball milling for certain period of time to obtain a high whisker content, uniform and stable ink with certain viscoelasticity. According to a set procedure, a three-dimensional structure is printed out layer by layer on a substrate, and finally conducting curing and cracking to obtain the SiCw / SiC composite material. The method provided by the invention utilizes thevolatile organic solvent and stable cross-linking agent to realize the stable extrusion of a SiCw / PCS based organic slurry, and overcomes the disadvantages of easy nozzle blockage, poor continuity andunstable slurry in the molding process of previous direct-writing molded ceramic suspensions, especially high whisker content suspensions. The designed slurry has simple and reasonable composition, and strongly controllable rheological properties, and is convenient for large-scale industrial application. At the same time, the three-dimensional periodic structure prepared according to the invention has a wide range of scales, and the high strength and modulus of SiC whisker can be combined to prepare a 3D-SiCw / SiC based composite material with good strength and toughness.
Owner:CENT SOUTH UNIV
Multistage structure cobalt hydroxide electrode material and preparation method therefor
InactiveCN106710889AImprove cycle stabilityGood shape controllabilityHybrid capacitor electrodesCell electrodesAluminium hydroxideFreeze-drying
The invention discloses a multistage structure cobalt hydroxide electrode material and a preparation method therefor. The method comprises the steps: firstly taking cobalt nitrate and aluminium nitrate as a cobalt source and an aluminium source, and mixing the cobalt source and aluminium source with deionized water; secondly adding urea, and carrying out the hydrothermal compounding; finally etching aluminium hydroxide through alkali, and obtaining multistage structure cobalt hydroxide. The material obtained through a hydrothermal method, a freeze drying method and an etching method is good in thermal stability, is high in crystallization degree, and is larger in specific area. The active sites are increased, thereby enabling the specific capacity to be larger. The material is an ideal energy material.
Owner:SHANGHAI INST OF TECH
Micron-sized barium sulfate micro-sphere synthesis method
ActiveCN108529659APromote hydrolysisGood particle size uniformityCalcium/strontium/barium sulfatesChemical synthesisMicrometer
The invention discloses a micron-sized barium sulfate micro-sphere synthesis method, and belongs to the technical field of chemical synthesis. A micron-sized barium sulfate micro-sphere is synthesizedby a reaction system comprising S2O8<2-> soluble salt, Ba<2+> soluble salt and complexing agents, and the shape of the barium sulfate micro-sphere is regulated by changing the mole ratio of the Ba<2+> soluble salt and the complexing agents, complexing temperature and the addition amount of the S2O8<2-> soluble salt. The synthesis method is simple, efficient, environmentally friendly and free frompollution, the yield of the prepared micron-sized barium sulfate micro-sphere reaches 90% or more, the particle size of the prepared micron-sized barium sulfate micro-sphere is 0.8-3 micrometers, andgranularity uniformity is good.
Owner:BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
Method for preparing gold crystals by adopting surface active agent molecule C18N3
InactiveCN102051687AAids in shape controlHelps growPolycrystalline material growthFrom normal temperature solutionsMicrometerChloride
The invention relates to a method for preparing gold crystals from nanometer to micrometer by adopting surface active agent molecule C18N3 as reducing agent and protecting agent. The surface active agent molecule C18N3 is not only adopted as the reducing agent to reduce chloroauric acid and obtain crystal nucleus, but also used as a sort of good protecting agent to facilitate the shape control and the growth of the metal crystals. Compared with the conventional method, the surface active agent molecule C18N3 is adopted in hydrothermal method applied in the invention to prepare the metal crystals, the prepared metal crystals have better shape controllability. By simply adjusting the molar ratio between the surface active agent molecule C18N3 and the chloroauric acid as well as the concentration of chloride in the solution, the metal crystals with different shapes can be prepared, including sphere, decahedron, plane triangle, plane pentagon and plane hexagon and two-dimension sheet shape.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Zinc oxide microspheres and preparation method thereof
InactiveCN104118902AControl shapeControl granularityMaterial nanotechnologyZinc oxides/hydroxidesHexamethylenetetramineMicrosphere
The invention discloses yarn ball-like zinc oxide microspheres and a preparation method thereof. The grain size of the microspheres is 2-9mu m, the microspheres consist of zinc oxide thin sheets, and a part of the microspheres have a large hole in the center. The preparation method comprises the following steps: dissolving zinc salt in water to prepare a solution, then, adding hexamethylenetetramine, stirring at room temperature till the solution is clarified, and then adding tartaric acid and uniformly stirring to obtain a reaction solution; and transferring the solution to a reaction kettle, reacting at 120-180 DEG C to prepare zinc oxide; after reaction, carrying out centrifugal separation and washing to obtain the zinc oxide microspheres. The preparation method of the zinc oxide microspheres disclosed by the invention has the advantages that the needed materials are cheap, the preparation process is simple and convenient to operate, the reaction temperature is low and the reaction time is short. The prepared product is regular in shape, has large specific surface area, strong morphologic controllability, good stability and repeatability and strong operability and practicality and has a potential application value and strong practicality in the field of photocatalytic performance, gas sensitivity and the like.
Owner:UNIV OF JINAN
Method for preparing oil-soluble hydroxyapatite nanorod through one-step method
InactiveCN109502565AAbundant and easy to obtainLow costNanotechnologyPhosphorus compoundsPhosphateHigh pressure
The invention relates to a method for preparing an oil-soluble hydroxyapatite nanorod through one-step method. The preparation method comprises the following steps: dissolving soluble calcium salt inthe water to obtain a solution A; dissolving soluble alkali in the mixed solution of ethanol and oleic acid to obtain a solution B; dropwise adding the solution B in a three-necked flask, and slowly dropwise adding the solution A under a stirring condition to obtain a solution C; dissolving the soluble phosphate in water to obtain a solution D, dropwise adding the solution D in the solution C, andstirring to obtain suspension liquid; dropwise adding the soluble alkali in the suspension liquid to obtain the mixed solution; reacting the mixed solution in a high-temperature and high-pressure reaction still at 80-180 DEG C, and cooling to room temperature to obtain a reaction solution; and centrifugally separating the reaction solution to obtain precipitate, and alternatively and centrifugally washing with absolute ethyl alcohol and cyclohexane to obtain oil-soluble hydroxyapatite nanorod. The raw material resource is rich and easy to obtain, the cost is low, the synthesis process is simple, and the process repeatability is high; the product is stable in quality and high in morphology controllability, and high in dispersion; and the method can be extensively used for the biomedical materials and the coating material and like fields.
Owner:HUBEI UNIV OF TECH
Graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and preparation method thereof
ActiveCN106229163AOvercoming easy reunionOvercoming poor cycle performanceHybrid capacitor electrodesCell electrodesCvd grapheneOxide
The invention discloses a graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and a preparation method thereof. The method disclosed by the invention comprises the steps of firstly obtaining graphene sponge (GOS) through freeze drying; carrying out hydrothermal composition on a nickel source, a manganese source and the graphene sponge (GOS); and finally carrying out high-temperature calcination to obtain a graphene coupling flower-ball Ni-Mn bimetal oxide (LGS). The graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional composite material obtained by a hydrothermal method, a freeze drying method and a high-temperature calcination method is good in thermal stability, high in crystallinity and high in shape and form controllability, and is an ideal energy material.
Owner:SHANGHAI APPLIED TECHNOLOGIES COLLEGE
Preparation method of vanadium oxytrichloride
InactiveCN110937630AAvoid poisoningAccelerated corrosionVanadium compoundsPhysical chemistryAmmonium metavanadate
The invention provides a preparation method of vanadium oxytrichloride, which comprises the following steps: mixing and grinding a vanadium source and a chlorine source in a molar ratio of 3: 2, placing the mixture in a roasting furnace, roasting the mixture in a non-oxidizing atmosphere at a roasting temperature of 400-900 DEG C for 10-120 minutes, and collecting distillate, namely vanadium oxytrichloride, wherein the vanadium source is one or more of ammonium metavanadate, ammonium polyvanadate, vanadium pentoxide, VONH4HPO4, VPO4, VOPO4, (VO2)3PO4, (VO)4P2O7, (VO)2P2O7, VOSiO3, (VO2)2SiO3 and (VO2)4SiO4. According to the preparation method of the vanadium oxychloride, no toxic and harmful substances are generated, and harm of high-corrosivity and high-toxicity chlorine to human bodies and the environment is avoided.
Owner:DALIAN RONGKE ENERGY STORAGE GRP CO LTD
Flaky vanadium dioxide film material and preparation method thereof
InactiveCN103556201AGood shape controllabilityImprove performanceSurface reaction electrolytic coatingVanadium dioxideSolvent
The invention discloses a flaky vanadium dioxide film material and a preparation method thereof. The preparation method comprises the following steps: performing deposition film coating within a certain voltage range by using an anodic oxidation method and performing annealing treatment within a certain temperature range, thus obtaining a film with a flaky structure. In a solution for deposition film coating, the mixed liquor of water and one or more than one of alcohols such as methanol, ethanol and n-propanol is used as a solvent, wherein the volume ratio of the alcohols to the water is 0:1 to 1:1; and a quadrivalent vanadium compound is used as a solute and the molar concentration is 0.01 to 10mol / L. The pH value of the solution is regulated to a certain interval and an auxiliary and a dispersing agent are added for aging for a certain time. The flaky vanadium dioxide film prepared by the anodic oxidation method has a uniform and regular shape and a large specific surface area; reaction conditions are mild, a process is simple, and the preparation method is high in efficiency, low in energy consumption and suitable for popularization and application.
Owner:SHANGHAI NORMAL UNIVERSITY
Preparation method of rare earth upconversion nanomaterial controlled by transition metal ion in morphology
InactiveCN107312541ASmall sizeGood crystal phaseMaterial nanotechnologyLuminescent compositionsRare earth ionsSilver ion
The invention relates to a preparation method of a rare earth upconversion nanomaterial controlled by a transition metal ion in morphology and belongs to the technical field of nanometer material science. According to the preparation method disclosed by the invention, the rare earth upconversion nanomaterial, namely NaY(Ag)F4:Yb, Er doped with a series of silver ions with different concentrations and gradients is prepared by adopting a solvothermal / hydrothermal method. The result shows that the size, crystal appearance and surface morphology of the prepared rare earth upconversion nanomaterial NaY(Ag)F4:Yb, Er obviously and regularly change along with gradient change of the concentration of the silver ions. Therefore, the morphology change of the rare earth upconversion nanomaterial NaY(Ag)F4:Yb, Er can be controlled by controlling the concentration of the silver ions. The method for controlling the rare earth upconversion nanomaterial has the advantages that one kind of ions is needed, and selected control factors are few; and simplicity and convenience in operation are realized, so the method is a relatively-simple and excellent method for controlling the rare earth upconversion nanomaterial.
Owner:DALIAN UNIV OF TECH
A bamboo leaf-like co(oh) 2 /graphene composite electrode material and preparation method thereof
ActiveCN106920932BOvercome the disadvantage of low energy densityImprove cycle stabilityHybrid capacitor electrodesCell electrodesFiltrationControllability
Owner:SHANGHAI INST OF TECH
Preparation method for graphene@CoAl-LDH composite electrode material
ActiveCN110571061AImprove cycle stabilityImprove charge and discharge performanceHybrid capacitor electrodesState of artComposite electrode
The invention relates to a preparation method for a graphene@CoAl-LDH composite electrode material. Freeze drying is carried out to obtain graphene oxide aerogel; a mixed solution of CoAl is prepared;and the graphene aerogel and the CoAl mixed solution are subjected to hydrothermal reaction, and after the temperature is reduced to room temperature, freeze drying is carried out to obtain the graphene@CoAl-LDH composite electrode material. Compared with the prior art, the preparation method for the graphene@CoAl-LDH composite electrode material is simple and environmentally friendly, controllable in the cost, and can be used for research in the aspect of energy storage of green energy materials.
Owner:SHANGHAI INST OF TECH
A kind of preparation method of oil-soluble hydroxyapatite nanosheet
InactiveCN105293461BAbundant and easy to obtainLow costMaterial nanotechnologyPhosphorus compoundsPhosphateControllability
Owner:HUBEI UNIV OF TECH
Preparation method of multiwalled carbon nanotubes derived from thiacalixarene 16-nucleus molecular clusters
ActiveCN110040718ASave materialEasy to makeOrganic-compounds/hydrides/coordination-complexes catalystsMulti-walled nanotubesMolecular clusterOperability
The invention discloses a preparation method of multiwalled carbon nanotubes derived from thiacalixarene 16-nucleus molecular clusters. The preparation method in the technical scheme comprises steps as follows: (1), preparation and spin coating of M16: tertiary butyl thiacalixarene H4BTC4A (0.1 mmol), NiCl2.6H2O (0.4 mmol), Dy(OAc)3.6H2O (0.3 mmol) and Na2CO3 (0.2 mmol) are mixed in DMA / CH3CN / Et3N, then a mixture is transferred into a reaction kettle and subjected to a reaction at 130 DEG C for 6 days, and a product is slowly cooled to the room temperature and named as M16; macromolecular clusters M16 are taken and put in a test tube, 10 mL of CHCl3 are added for dissolving, and a solution is dispersed on a quartz substrate with a spin-coating method and used as a catalyst precursor; (2),preparation of the carbon nanotubes with a chemical vapor deposition method. The required materials are low in cost, the preparation process is simple, the preparation cycle is short, reaction conditions are simple, and the prepared product has regular morphology, larger specific surface area, high morphology controllability and good stability and repeatability, has quite high operability and practicability and further has potential application value and quite high practicability in the fields of electro-catalytic property and the like.
Owner:WENZHOU UNIVERSITY
Synthesis method of ZIF-67 derived CoO
The invention discloses a synthesis method for obtaining CoO micron particles with maintained morphology through a two-step reaction by taking ZIF-67 as a template. The method comprises the followingsteps: (1) respectively dissolving Co (NO3) 2.6 H2O and 2-methylimidazole in 100mL of methanol, performing stirring and combining metal and ligand solutions, stirring for 30 minutes, and standing for24 hours to obtain ZIF-67 particles; (2) raising the temperature to 350 DEG C at the speed of 10 DEG C / min in an air atmosphere, carrying out chemical vapor deposition (CVD) tubular furnace calcination on the ZIF-67 particles for 2 hours to obtain Co3O4 particles, and carrying out PVP coating (the molar ratio of Co3O4 to PVP-1 is 1: 1.4, ultrasonic treatment is conducted, the Co3O4 particles are soaked in ethyl alcohol for 18h, and then direct centrifugal drying is conducted); and (3) raising the temperature to 800 DEG C at a speed of 10 DEG C / min in an Ar / H2 atmosphere, calcining the Co3O4 particles in a CVD tubular furnace, and keeping for 2 hours to obtain CoO particles. According to the invention, CoO with maintained morphology derived from a metal organic framework is prepared for thefirst time, the required materials are cheap, the preparation process is simple, the stability is good, the repetition rate is high, and the CoO has potential application value and strong practicability in the fields of electrocatalysis and the like.
Owner:WENZHOU UNIVERSITY +1
Method for improving dispersibility of insoluble amorphous calcium phosphate
InactiveCN110680810ASuspension stabilityLarge specific surface areaInorganic non-active ingredientsKetone active ingredientsCancer cellSodium phosphates
The invention discloses a method for improving the dispersibility of insoluble amorphous calcium phosphate, provides a method for dispersing and encapsulating a drug by using the insoluble amorphous calcium phosphate, and belongs to the technical field of biomaterials. According to the method, firstly, amorphous calcium phosphate nanoparticles are prepared by adopting a co-precipitation method, then are added to an aqueous solution of sodium hexametaphosphate, and are subjected to probe ultrasonic treatment to form spherical particles. The preparation method is simple and fast, no surfactant is added, the prepared nanoparticles have a uniform particle size and good dispersion stability and can be stably dispersed at room temperature for one month, the nanoparticles have good pH response and release properties to the drug, the amount of release of the drug under simulated tumor pH environment is higher than the amount of release under normal tissue environment, at the same time, the dugload nanoparticles loaded with curcumin (Cur) show excellent inhibitory ability on A549 cells, the survival rate of cancer cells is significantly decreased, and using as an ideal carrier for chemotherapy drugs can be realized.
Owner:TAIYUAN UNIV OF TECH
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