245results about How to "High degree of order" patented technology

A unitary graphene-based integrated heat sink comprising a heat collection member (base) and at least one heat dissipation member (e.g. fins) integral to the baser, wherein the base is configured to be in thermal contact with a heat source, collects heat therefrom, and dissipates heat through the fins. The unitary graphene material is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C., 500° C., 1,250° C., or 2,000° C., and contains chemically bonded graphene molecules having inter-graphene distance of 0.3354-0.4 nm (preferably <0.337 nm). The unitary graphene material is a graphene single crystal, a poly-crystal with incomplete grain boundaries, or a poly-crystal having large grain sizes (e.g. >mm or cm), exhibiting a degree of graphitization preferably from 1% to 100% and a Mosaic spread value less than 0.7 (preferably no greater than 0.4). The finned heat sink may also be made from a filler-reinforced graphene matrix composite.

The invention relates to new reactive mesogenic benzodithiophene derivatives, their use as semiconductors or charge transport materials, in optical, electro-optical or electronic devices like for example liquid crystal displays, optical films, organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in photovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the reactive mesogenic benzodithiophenes.

Mono-, oligo- and poly-bis(thienyl) arylenes are suitable as as charge transport materials or semiconductors in electrooptical, electronic and electroluminescent devices, to charge transport and semiconductor materials, components and devices comprising mono-, oligo- and poly-bis(thienyl) arylenes.

This invention provides an inorganic coating-protected unitary graphene material article for concentrated photovoltaic cell heat dissipation. The article comprises at least a layer of unitary graphene material having two primary surfaces and an electrically non-conducting layer of inorganic coating deposited on at least one of the primary surfaces, wherein the unitary graphene material is obtained from heat-treating a graphene oxide gel at a heat treatment temperature higher than 100° C. and contains chemically bonded graphene molecules or chemically merged graphene planes having an inter-graphene spacing no greater than 0.40 nm, preferably less than 0.337 nm, and most preferably less than 0.3346 nm.

The invention discloses an organic-inorganic hybrid mesoporous catalyst for purifying VOCs (volatile organic compounds) and a method for preparing the organic-inorganic hybrid mesoporous catalyst. SBA-15 mesoporous molecular sieves are used as carriers of the organic-inorganic hybrid mesoporous catalyst, organic groups (phenyl groups, amino groups and sulfhydryl groups) and transition metal oxide (oxide of Mn, Fe and Co) are used as active components of the organic-inorganic hybrid mesoporous catalyst, and chloride of alkali metal or alkaline-earth metal is used as an auxiliary of the organic-inorganic hybrid mesoporous catalyst. The specific surface area of the organic-inorganic hybrid mesoporous catalyst ranges from 700 m<2>/g to 900 m<2>/g, and the average pore diameter of pore passages in the organic-inorganic hybrid mesoporous catalyst ranges from 8 nm to 15 nm. The method includes supporting the organic groups on the SBA-15 molecular sieves by the aid of an in-situ solvent thermal synthesis process; modifying the SBA-15 mesoporous molecular sieves by the transition metal oxide by the aid of an impregnation process to obtain the organic-inorganic hybrid mesoporous catalyst. The organic-inorganic hybrid mesoporous catalyst and the method have the advantages that the organic-inorganic hybrid mesoporous catalyst has large mesoporous pore diameters and the large specific surface area and is high in catalytic activity, catalytic active constituents are good in dispersibility, acid centers can be reinforced, and the method is simple and feasible and is low in cost; the VOCs can be converted into harmless carbon dioxide and water under synergy of the organic-inorganic hybrid mesoporous catalyst and low-temperature plasma technologies at the normal temperature, and the organic-inorganic hybrid mesoporous catalyst has few byproducts and is difficult to inactivate.

The invention belongs to the technical field of preparation of micro-nano fibers and relates to an electrostatic spinning device with a spinning nozzle capable of doing a linear reciprocatingmotion; a stainless steel needle head is fixed on an injector needle tube and is connected with the anode of a high-voltage direct-current power supply; the cathode of the high-voltage direct-current power supply is connected with an aluminum foil collector; the aluminum foil collector is fixed on a base of the device; the injector needle tube is fixed on one end of a linear motion rod; the linear motion rod runs through two parallel brackets and is capable of doing harmonic linear motion on the brackets; and the other end of the linear motion rod is connected with an organic glass plate by a crankshaft connection rod. The electrostatic spinning device has the advantages of multiple functions, concentrated spinning distribution and good ordering, small spinning distance, high yield, low working voltage, and the like.

The invention discloses a P-type graphene/N-type germanium nanocone array schottky junction infrared photoelectric detector and a preparation method thereof. The preparation method is characterized by comprising the following steps of forming an insulating layer on the front face of an N-type germanium basal layer in an evaporation manner by taking the N-type germanium basal layer as a base region of the photoelectric detector; arranging an N-type germanium nanocone array on the upper surface of the N-type germanium basal layer; transferring P-type graphene to the N-type germanium nanocone array covered with the insulating layer; coating the P-type graphene with indium tin oxide (ITO) nano-particles in a spin manner to realize a P-type graphene/N-type germanium nanocone array schottky junction-based photodiode. According to the infrared photoelectric detector disclosed by the invention, by utilizing the structure of the germanium nanocone array and the characteristic of the surface plasma resonance of the ITO nano-particles, the ability of absorbing light is enhanced, and the ability of responding to light is improved; the preparation method disclosed by the invention is simple, is suitable for mass production, and can be used for preparing the infrared photoelectric detector which has high light absorption ability and is high in photoelectric conversion efficiency, and a foundation is laid for applying the germanium nanocone array structure to the photoelectric detector.

The invention discloses a method for obtaining high-performance polyaniline base thermoelectric materials. The method comprises the following steps: (1) mixing polyaniline powder with ammonia water solution, carrying out stir, filter and drying, and obtaining eigen-state polyaniline, (2) mixing the polyaniline with sulfonic acid, carrying out grind, and obtaining polyaniline doped with the sulfonic acid, (3) dissolving the polyaniline doped with the sulfonic acid in phenol solvent, carrying out stirr, and obtaining polyaniline solution, and (4) adding nanocarbon materials in the polyaniline solution, carrying out stir in a full mode, removing the phenol solvent, and obtaining the high-performance polyaniline base thermoelectric materials. According to the method for obtaining the high-performance polyaniline base thermoelectric materials, the order degree of polyaniline molecular chain arrangement is firstly improved through interaction of the phenol solvent and polyaniline molecules, then through composition with the nano carbon composite materials, the order degree of the polyaniline molecular chain arrangement is further enhanced, and the high-performance polyaniline base thermoelectric materials are obtained. Therefore, ZT values of the polyaniline base thermoelectric materials and ZT values of block-shaped materials can be respectively improved by 0.5 and 0.05.

The invention discloses a method for preparing conducting polymer micro-nanofibers in a magnetic spinning mode. The method comprises the steps that 1, a magnetic spinning device is built, wherein the magnetic spinning device comprises a rotary collection disc with a permanent magnet; 2, a spinning precursor solution is prepared, wherein magnetic nano particles, high-molecular polymer and conducting polymer are mixed and dissolved in an organic solvent solution; 3, the magnetic spinning device is utilized for preparing conducting polymer micro-nano complex fibers, wherein the spinning precursor solution is injected into a feeding device, the feeding device is started, liquid drops on an opening of a spinning nozzle forms a jet flow under the effect of magnetic field force to be connected with the permanent magnet to be a bridge, a brushless direct-current motor is started to drive the collection disc to rotate, the ferrofluid jet flow is continuously pulled out under the effect of magnetic field force, and conducting polymer micro-nanofibers are wound and formed among vertical supporting columns of the collection disc. The method does not need the high voltage effect, reduces the production cost and potential safety hazards, is suitable for large-scale production and has the good application prospect, and the fibers are distributed in order.

The invention discloses a preparation method of columnar monocrystal nano-TiO2 array film. In the method, firstly, hydrochloric acid and alcohol substances (methyl alcohol, ethanol, butanol and glycol) are dipped into tetrabutyl titanate under the condition of stirring, and mixture is dripped into deionized water to form even solution; the solution is poured into a hydrothermal reaction kettle; the conductive surface of conductive glass cleaned by deionized water, alcohol and acetone solution faces downwards to lean against the inner wall of the reaction kettle; after the reaction kettle is put in a constant-temperature oven for hydro-thermal treatment for a period, conductive glass after reaction is washed with deionized water and naturally dried to obtain columnar monocrystal nano-TiO2. The invention has the advantages of low cost of raw materials, low experiment temperature, simple technology, convenient operation and the like. The prepared columnar monocrystal nano-TiO2 array film has adjustable density, thickness, orientation and degree of crystallinity and is suitable for industrial production. The invention can be used for solar cell film material and photocatalytic degradation organic matter material.

The invention belongs to the field of mesoporous materials and discloses a nitrogen-doped ordered mesoporous carbon material and a preparation method thereof. The preparation method comprises the following steps: after uniformly mixing concentrated sulfuric acid, saccharose and deionized water, adding a silicon-based mesoporous material SBA-15 to obtain a milk white suspended liquid A; drying A at 90-100 DEG C, and then raising the temperature to 150-170 DEG C to be carbonized to obtain a solid B; grinding the solid B into powder and then adding concentrated sulfuric acid, saccharose and deionized water to be uniformly mixed, repeating the drying and carbonizing processes, and then roasting the mixture at 900-1000 DEG C to obtain a solid C; and removing a SBA-15 template from the solid C to obtain ordered mesoporous carbon, and then uniformly grinding and mixing the carbon with a nitrogen source, and roasting the mixture for 3-6 hours at 900-1000 DEG C to obtain a product. The method provided by the invention not only can avoid roasting in a vacuum condition, but also can effectively simplify the operating process and greatly lower the preparation cost of the material.

The invention provides a vanadium-doped silicon oxide-based mesoporous molecular sieve catalyst, as well as a preparation method and application thereof. According to the catalyst, a pure silicon mesoporous molecular sieve KIT-6 is taken as a carrier, vanadium oxide is taken as an active ingredient, and is doped into a framework of the pure silicon mesoporous molecular sieve KIT-6, and the molar ratio of V to Si is 0.1:100 to 8:100. The invention further provides the preparation method for the catalyst and the application of the catalyst to selective oxidative dehydrogenation of propane for production of olefin. According to the vanadium-doped silicon oxide-based mesoporous molecular sieve catalyst, the dispersity of the active ingredient vanadium is higher, the concentration of an active site is higher, and the stability of the active site is higher, so that the catalytic activity of the catalyst is higher. When the catalyst is applied to reaction of selective oxidative dehydrogenation of the propane for production of the olefin, the molar recovery rates of products propene and olefin of selective oxidation reaction of the propane can reach 35.6 percent and 38.6 percent respectively.

The invention relates to a preparation method for heteratom-containing ordered mesoporous carbon with high specific capacitance. The method comprises: melting phenol; adding a catalyst; uniformly stirring, and adding an aqueous solution of formaldehyde; carrying out a reaction for 10-60 minutes at a temperature of 65-90 DEG C; adding a heteroatom compound; continuously carrying out the reaction for 10-60 minutes, and stopping the stirring; adjusting the pH value of the solution to more than or equal to 7.0; carrying out decompression dehydration to obtain a resin; dissolving the resulting resin in an organic solvent to obtain a uniformly heteratom-containing phenol formaldehyde resin solution; dissolving a block copolymer in a solvent to form a uniform solution; adding an oligomer of silicon to the resulting uniform solution, and stirring for 0.5-4 hours; then adding the resulting solution to the heteratom-containing phenol formaldehyde resin solution; uniformly stirring, and volatilizing the solvent for 6-18 hours; curing for 6-48 hours; carrying out carbonization for 0.1-3 hours at a temperature of 600-1200 DEG C under inert atmosphere; adopting hydrofluoric acid or a concentrated alkali solution to treat the carbonized sample, removing the silicon, washing and drying to obtain the heteratom-containing ordered mesoporous carbon. The method of the present invention has advantages of simple process and low cost, and the produced carbon has high specific capacitance.

The invention discloses a nanometer lignin carbon-zinc oxidecomposite material as well as a preparation method and application thereof. The method comprises the following steps: (1) dissolving ligninin an alkaline solution, carrying out hydrothermal pretreatment, conducting cooling, and adjusting a pH value to 3-5 to obtain an acid-soluble lignin solution; (2) adding a mixed solution of soluble zinc salt and soluble carbonate into the acid-soluble lignin solution, conducting a hydrothermal reaction, then adding aldehydes, and continuing the hydrothermal reaction to obtain a ploycondensed lignin/zinc oxide compound; and (3) carbonizing the polycondensed lignin/zinc oxide compound to obtain the nanometer lignin carbon-zinc oxidecomposite material. In the obtained nanometer lignin carbon-zinc oxidecomposite material, lignin carbon uniformly coats the surfaces of zinc oxide particles to form a uniform carbon layer with a continuous structure, so the problems of serious volume expansion and poor conductivity of zinc oxide serving as a lithium ion negative electrode material are solved, and the specific capacity, the initial coulombic efficiency and the rate capability of a lithium ionbattery are improved.

The invention discloses a method for preparing zirconium oxide polycrystalline powder with ordered laminar nanostructure/mesoporous structure by using a surfactant as a template. The method comprises the following steps of: (1) weighing 20 parts of mixed solution of zirconium oxychloride, water and alcohol; (2) weighing 20 parts of mixed solution of sodium dodecyl sulfate, water and alcohol; (3) weighing 10 parts of mixed solution of sodium hydroxide, water and alcohol; (4) adding the mixed solution prepared in the step (2) and the mixed solution prepared in the step (3) into a flask in the step (1) to reflux and react for 1 to 4 hours with stirring; (5) heating and performing hydrothermal reaction on the mixture for 12 to 36 hours under autogenous pressure; (6) standing the stock solution at the room temperature, washing the product, filtering or performing centrifugal separation on the product and drying the product; and (7) raising the temperature to 500 DEG C and calcining the product for 2 hours to obtain the zirconium oxide polycrystalline powder with ordered laminar nanostructure/mesoporous structure. By using a new method of combined reflux method and hydrothermal method and the surfactant as the template, the degree of order of the product is improved and high thermal stability of the product is ensured.