355results about How to "The method is simple and controllable" patented technology

The present invention discloses hydrogenating catalyst of foam metal and its preparation process and application. The hydrogenating catalyst includes foamed metal carrier and active noble metal component in effective amount supported onto the carrier, the carrier is prepared through powder metallurgical process, and the active component is supported via chemical plating process and distributed homogeneously on the port surfaces of the foamed carrier. The catalyst has the advantages of high catalytic activity, firm combination between the active component and the carrier, high stability, simple preparation process, high porosity of the carrier, great specific surface area, etc. in addition, the catalyst provides sufficient gas-liquid contact area, is favorable to mass transfer between gas phase and liquid phase, may be used in catalytic rectification and possesses both reaction and separation effects.

The invention discloses a preparation method of a nano silver / poly dopamine composite membrane. The preparation method comprises following steps: phase inversion is adopted so as to prepare a polyether sulfone (PES) ultrafiltration basement membrane; the PES ultrafiltration basement membrane is immersed in a dopamine solution, and an ultrathin active layer is formed via deposition of poly dopamine onto the surface of the PES ultrafiltration basement membrane; in-suit introduction of nano silver onto the membrane surface is realized via silver nitrate postprocessing, and the nano silver / poly dopamine composite membrane is prepared. Advantages of the preparation method are that: compared with the preparation method of conventional nano silver composite membranes, poly dopamine is taken as a multifunctional unit, and construction of a separation layer, mineralization, and immobilization of nano silver are realized. The preparation method is green, simple, convenient, and controllable; the separation layer is obtained via water phase construction, and no organic solvent is needed; in-suit synthesis of nano silver is realized, and no chemical reductant or photo-initiation is needed. The nano silver / poly dopamine composite membrane possesses relatively high water flux, and excellent dye separation performance and antibacterial properties.

The invention relates to a single-distributive micron short fiber-typed vaterite calcium carbonate and its preparing method. The calcium carbonate crystal is needle short fiber-typed, its length is 2-8 micron and width is 0.3-1.5 micron, the ratio of length and diameter is 5-10, its content of vaterite calcium carbonate is larger than 90% with small particle on the surface of. The preparing method includes mix the aqueous solution of carbonate containing water soluble organic solvent with aqueous solution of calcium salt also containing that, make use of the different dissolubility of carbonate and calcium salt in water soluble organic solvent and water, and the different solvation to calcium ion, compound the product. The calcium carbonate has remarkable single distribution, large ratio of length and diameter, high activity of surface, suitable for coating on paper, filling plastic, coating, printing ink and paper, as well as the raw material for calcium preparations.

The invention belongs to the technical field of zeolite molecular sieves, in particular to a method for adjusting a surface hole diameter of a ZSM-5 molecular sieve by surface dealuminizing and compensating silicon. The invention accurately controls the surface hole diameter of the molecular sieve by using the treating measure of dealuminizing and compensating silicon on the ZSM-5 zeolite molecular sieve with ammonium fluosilicate solution. An ultrathin layer enriched with silicon is formed on the surface of the ZSM-5 zeolite molecular sieve treated by the method so that the hole caliber on the surface of the molecular sieve is shrunk. The ZSM-5 zeolite molecular sieves with different hole caliber shrinkage level can be selectively obtained by changing different treating conditions. The SM-5 zeolite molecular sieves modified by the method can be used for absorbing a mixture of three isomerides of P-, M-and O-Xylene.

The invention belongs to the field of nano material preparation and provides a method to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in a core-shell structure. Spherical silver nano particles are used as substrates of surface-common-enhanced fluorescence and surface-enhanced Raman, the silver nano particles are placed inside the shell layers, with good surface-enhanced Raman activity, of gold nano particles, fluorescent dye molecules are disposed between the silver nano particles and the gold nano particles, and the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in the core-shell structure. A Stober method is used to change corresponding experiment parameters, silicon dioxide of different thicknesses is wrapped on the surfaces of the silver nano particles to adjusting the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles, surface-common-enhanced fluorescence and surface-enhanced Raman signals of the manufactured multi-layer core-shell structure composite particles are further enhanced, and the multi-layer core-shell structure composite particles are good in water solubility, uniform and stable in nature, and promising in potential application prospect in fields such as biological imaging, safety detection and catalyzing. The method is wide in raw material source, simple and easy to operate, easy in batch and large-scale production, good in industrial production foundation, and promising in application prospect.

The invention provides an adhesive for 3D printing of photocurable ceramic and a preparation method and application of the adhesive. The adhesive for 3D printing of photocurable ceramic is prepared from, by weight, 60-85% of ceramic powder, 5-14% of photocurable resin, 5-18% of acrylate monomer, 1-5% of UV photoinitiator and 1-3% of other auxiliaries.

The invention discloses a method for partially oxidizing sodium alginate. The steps of the method are as follows: 1) a sodium alginate solution is prepared; 2) a potassium permanganate solution is prepared; 3) the pH value of the sodium alginate solution is adjusted by an acid solution; 4) the potassium permanganate solution is added to the sodium alginate solution and stirred for reaction under conditions of room temperature and light prevention; the oxidizing reaction stops when the mixed solution is colorless; 5) the solution after reaction is added with sodium chloride and then added with ethanol so as to separate precipitation out of the filtrate, and coarse products are obtained after decompression and pumping filtration; 6) the coarse products are dissolved in water and dialyzed; 7) after the complete dialysis, dialyzate is pre-freezed and then freeze-dried, and finally partially oxidizing sodium alginate products are obtained. The method has the advantages of simple and easy control of process, easy collection of raw materials, low cost and convenient popularization and application; the partially oxidizing sodium alginate prepared can be used to degrade gel materials, drug slow release materials, biological carrier materials and tissue engineering materials, etc.

A preparation method for a Cu-based hydrogenation catalyst comprises the following steps: dissolving soluble copper salt into water, then adding a carrier into the solution, and uniformly loading a copper precursor on the surface of the carrier to obtain a precursor sample; mixing the precursor sample and ethanol to form a suspending liquid, coating the suspending liquid on the surface of a glass sheet, impulsing polyisocyanate into an MLD reaction cavity, then impulsing an M precursor to be subjected to monomolecular layer reaction on the sample surface in sequence to obtain a hybrid membrane coated copper precursor compound; conducting heat treatment on the compound in air to obtain a nanometer CuO-MOx compound, and then conducting reduction in the reducing atmosphere to obtain the Cu-MOx interface catalyst. The preparation method has the advantage that the Cu-MOx interface structure can be regulated and controlled.

The invention provides a QLED containing a noble metal nanomaterial. The QLED comprises an anode, a hole injection layer, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, an electron injection layer and a cathode which are sequentially stacked, wherein the QLED contains the noble metal nanomaterial; the noble metal nanomaterial is a nano noble metal core-shell structure composite material and comprises a noble metal core and a shell layer structure coating the noble metal core; and at least one of the hole injection layer, the hole transport layer, the quantum dot light-emitting layer, the electron transport layer and the electron injection layer is doped with the nano noble metal core-shell structure composite material; or the nano noble metal core-shell structure composite material is arranged between any two adjacent layers of structures of the hole injection layer, the hole transport layer, the quantum dot light-emitting layer, the electron transport layer and the electron injection layer as a nano noble metal core-shell layer.

The invention belongs to forming range of three-dimensional structure, and particularly relates to a direct-writing forming method of printing and converting a precursor into ceramic. The method includes: using a ceramic precursor as a solute, dissolving the ceramic precursor in liquid-state organic matter, stirring raw materials to obtain ink with certain viscoelasticity, and putting the ink intoa needle cylinder; through an air pressure controller and according to a set program, printing out a three-dimensional structure on a substrate layer by layer, and carrying out precursor conversion to obtain ceramic with a complex three-dimensional structure. The direct-writing forming method overcomes the defect that existing direct-writing forming ceramic suspensions are prone to nozzle blockage, low in continuity and unstable in slurry in the process of forming. The designed slurry is simple and reasonable in composition, high in rheological controllability and convenient for large-scale industrial application. A three-dimensional periodic structure prepared by the method is wide in scale range, and decimeter-scale, centimeter-scale, millimeter-scale, micrometer-scale or nanometer-scale control can be realized simply through adjusting aperture of a needle head.

The invention provides a printing type top-emitting electroluminescent display. The printing type top-emitting electroluminescent display comprises a TFT array substrate, a pixel bank, a light-emitting component, an auxiliary electrode, a first thin film packaging layer, a filling layer and a second thin film packaging layer, wherein the pixel bank is arranged on the TFT array substrate; the pixel bank comprises a first pixel defining layer and a second pixel defining layer; the first pixel defining layer is arranged on the TFT array substrate and is used for defining a sub-pixel light-emitting area; the second pixel defining layer is arranged on the first pixel defining layer and is used for defining connected sub-pixels with the same color; the light-emitting component is arranged in the sub-pixel light-emitting area; the light-emitting component comprises an imagination pixel electrode, a functional layer and a transparent top electrode which are arranged on the TFT array substrate sequentially; the imagination pixel electrode is electrically connected with a TFT array; the transparent top electrode extends to cover the pixel bank; the auxiliary electrode is arranged on the transparent top electrode on the pixel bank and is connected with the transparent top electrode; the first thin film packaging layer and the filling layer are arranged on the transparent top electrode without the auxiliary electrode sequentially; and the second thin film packaging layer covers the auxiliary electrode and the filling layer.

The invention provides an ozone oxidation catalyst based on an active gamma-alumina ball carrier. The ozone oxidation catalyst based on the active gamma-alumina ball carrier is an active gamma-aluminaball-supported metal oxide, wherein the metal oxide is at least one selected from a group consisting of iron oxide, copper oxide, ruthenium oxide, cerium oxide, cobalt oxide, manganese oxide and nickel oxide.

The invention provides a C3N4 preparation method. Thiourea is calcined at the temperature ranging from 300 DEG C to 650 DEG C to obtain a product, and the product contains C3N4. The thiourea is used as a precursor, molecules of the thiourea are condensed and polymerized by means of heating to form polymers, but the polymers are not stable and further can be decomposed into the C3N4. The method is convenient and speedy, poisonous and harmful precursors are omitted in a preparation procedure, yield is high, all the thiourea can participate in reaction and is reacted completely as shown in reaction detection, and no other pollutants, except for small amounts of sulfur dioxide, hydrogen sulfide and ammonia, are released, while the sulfur dioxide, the hydrogen sulfide and the ammonia can be absorbed by the aid of water and cannot pollute environments. In addition, the procedure of the preparation method is controllable, steps of the method are simple, only heating is required, complicated operation is omitted, and the preparation method is applicable to large-scale industrial production.

The invention provides a preparation method of a metal-doped zinc oxide liquid-phase homogenous-dispersed body. The preparation method is characterized in that zinc salt is used as a reaction source and metal salt is used as a doping source in an alcohol phase system, and on that basis, the metal-doped zinc oxide nano-particle dispersing liquid is prepared by adoptinga low-temperature solution method under an alkaline condition; then a trace of surfactant is added to further improve the dispersing stability and the conductivity. The liquid-phase homogenous-dispersed body is characterized in that the metal-doped zinc oxide particles are wrapped with the surfactant layer, and the one-dimensional size is 10-20nm; the nano-particles are uniformly dispersed in the liquid-phase medium; the concentration of the metal-doped zinc oxide particles in the dispersed body is 10-20mg / mL. The preparation temperature of the metal-doped zinc oxide dispersed body is not beyond 80 DEG C; the preparation process is simple, the energy is saved and the environment is protected; the product is high in stability, high in conductivity, and free from precipitation after standing for more than 3 months; the obtained nanometer material is high in conductivity and has a good application prospect in the field of photoelectric appliance such as the solar cell field.

The invention provides a preparation method of a carbon nitride / tungsten trioxide nano composite material. The preparation method comprises the following steps: (1) mixing and fusing deionized water and absolute ethyl alcohol, then stirring, adding sodium tungstate, stirring to dissolve at room temperature, adding a carbon nitride precursor, stirring, precipitating to obtain crystals, drying the crystals, grinding the crystals, and thus obtaining a white powder, wherein the carbon nitride precursor comprises urea and dicyandiamide; (2) calcining the white powder obtained in the step (1) to obtain a yellow solid, grinding the yellow solid, and collecting a yellow powder; (3) stirring the yellow powder obtained in the step (2) with HCl; and swashing away impurities, then filtering, drying, and grinding to obtain a yellow powder; and (4) calcining the yellow powder obtained in the step (3). The invention also provides the carbon nitride / tungsten trioxide nano composite material prepared by the method and an application thereof. The method is simple and easy to control, and friendly to the environment; the obtained nano composite material has high dispersion and high catalytic performance; and an electrode prepared from the nano composite material has high sensitivity.

The invention discloses a conductive composite fiber yarn and a continuous preparation method and application thereof. According to the conductive composite fiber yarn, silver nanowires are mainly used as conductive carriers, polyurethane is used as a spinning base material, a polyurethane spinning solution is subjected to electrostatic spinning by a water bath method to prepare polyurethane nanofibers, then a silver nanowire dispersion solution is atomized and sprayed to the surface of the polyurethane nanofibers, and the silver nanowire / polyurethane conductive composite fiber yarn is prepared through water bath drafting, drying and coiling; the prepared conductive composite fiber yarn has high conductive sensitivity, high stretchability, washability and durability, and has great application potential in the fields of wearable equipment, sensors, intelligent textiles and the like. The preparation method is simple, easy to control and low in cost, and has the prospect of large-scale industrial popularization.

The invention discloses a method for modifying a lithium-rich manganese-based cathode material. The method comprises the following steps: preparing a precursor of the lithium-rich manganese-based cathode material, uniformly mixing the precursor with lithium carbonate and doping and modifying metal villiaumite, sintering the uniformly mixed mixture at a high temperature to obtain a modified lithium-rich manganese-based cathode material. The modification process of the method disclosed by the invention is simple and easy to control, the steps of the existing preparation process are not added, and the electrochemical performance of the product is excellent.

The present invention relates to a preparing method of a nano laminar thermoelectric Bi2Se3 compound. The preparing method of a nano laminar thermoelectric Bi2Se3 compound is characterized in that the method comprises the following steps: 1) NH3 H2O-NH4C1 buffer solution, Bi(NO3)3 5H2O and C10H14N2Na2O8 2H2O are prepared at the ratio of 1L to 0.02mol to 0.02mol, mixed and agitated by magnetic force for 30 minutes, and a mixed solution A is obtained; 2) selenosulfate is added to the mixed solution A by the stoichiometric ratio of the chemical formula Bi2Se3, and a mixed solution B is obtained by uniformly agitating the mixture; 3) a product C is obtained by agitating the mixed solution B under argon protective atmosphere; 4) the product C obtained in the step 3 is centrifuged, and the nano laminar thermoelectric Bi2Se3 compound is obtained by freeze-drying the sediments obtained by centrifugation. The method has the advantages of easy raw material acquisition, no reductant requirement, cost saving, short reaction time, low energy consumption, good repeatability, simple equipment, simple technique, high safety and no pollution. The present invention is suitable for large scale industrial production.

The invention provides a QLED, which comprises, in sequence, the first electrode, hole injection layer, hole transport layer, emitting layer, electron transport layer and the second electrode. The emitting layer comprises quantum dots luminescent materials and mixed transport materials. The mixed transport materials comprise hole transport material and electron transport material. The hole transport material and electron transport material form double continuous network structure in the emitting layer, with the quantum dots luminescent materials scattered in the double continuous network structure.

The invention provides a detection method of total phosphorus content in water. The detection method comprises the following steps: (1) determining the absorbance of a phosphate standard solution by adopting a spectrophotometric method and drawing a working curve; (2) providing a water body test sample to be detected and adding a potassium persulfate solution into the water body test sample to be detected; carrying out microwave sealed digestion; oxidizing all total phosphorus in the water body test sample to be detected into orthophosphate, so as to obtain a digestion solution; (3) adding ascorbic acid into the digestion solution and uniformly mixing for 30s to 60s; adding a molybdate solution and carrying out color development reaction to obtain a reaction solution; (4) providing a blank water sample and referring to operation of steps (2) and (3) to obtain a blank reaction solution; (5) carrying out spectrophotometric absorbance determination on the reaction solution and the blank water sample to obtain test sample absorbance and blank absorbance respectively; referring to the working curve and calculating to obtain the total phosphorus content in the water body test sample to be detected.

The invention discloses a porous copper oxide aggregate composed of nano crystals and the preparing method thereof, using bivalent copper ion water solution to react wih oxalic acid radical-containing water solution, firstly preparing cake micron spheroidic copper oxalate aggregate, then burning the synthesized copper oxalate aggregate on control process condtions, and obtaining monodisperse, high-specific surface area, porous coppoer oxide aggregate composed of nano crystals. And it can retain reacting activity of nano grains and avoid their aggregation, and the channel surface is formed by those of nano grains. As a catalyst, it is convenient to recovery and recycle. And the method is simple and convenient, controllable, low-cost and easy to implement scale industrialized production.

The invention belongs to the technical field of nanometer material preparation, and particularly relates to a preparation method of nitrogenous graphene quantum dot composite particles with controlled structure and fluorescence. The preparation method comprises the following specific steps that: ammonia-water reacts with and cut epoxy groups on the surfaces of graphene quantum dots by taking a low-concentration ammonia-water solution as an etching agent and controlling reaction conditions under mild conditions so that lots of graphene quantum dot flakes are generated, the graphene quantum dot flakes gather and are assembled into spherical graphene quantum dots under a hydrothermal condition, so that the surfaces of the formed flaky graphene quantum dots are loaded with the lots of the spherical graphene quantum dots. The structure and appearance of the composite particles can be simply controlled by changing correspondingly experimental parameters; and the products have controlled fluorescence, good water-solubility, uniform and stable property and potential application prospect in fields of electronics, catalysis and bio-imaging. The raw materials in the method are wide in source, and the preparation method is simple, easy in operation and beneficial to batching and large-scale production and has good industrial production basis and wide application prospect.

The present invention provides a transparent display panel and a preparation method thereof. The transparent display panel comprises a pixel light-emitting area and a non-pixel light-emitting area which are arranged on a substrate, and the light-emitting components are arranged in the pixel light-emitting area, wherein the light-emitting components comprise a reflecting electrode, a transparent pixel electrode, a light-emitting layer and a transparent top electrode which are arranged orderly, and the reflecting electrode is arranged in the inner edge area of the pixel light-emitting area and extends outwards to the non-pixel light-emitting area, so that the light-emitting components form a reflection area in which the reflecting electrode is arranged and a light transmission area beyond the reflection area.

The invention discloses a method for preparing a g-C3N4 hollow fiber film on a large scale. The method includes the following steps of putting melamine or urea or a mixture of melamine and urea in a muffle furnace, firing the material at a temperature of 450-600 DEG C for 1-4 hours to obtain yellow g-C3N4 blocks, evenly grinding the yellow g-C3N4 blocks to form g-C3N4 powder, putting the g-C3N4 powder in the muffle furnace, firing the g-C3N4 powder at a temperature of 400-700 DEG C for 1-4 hours to obtain g-C3N4 nanometer sheets, dispersing the g-C3N4 nanometer sheets and polymers in organic solvent to prepare a casting membrane solution, and spinning the casting membrane solution (as a shell solution) and water (as a core solution) in a coagulating bath at the same time through a spinning head of a spinning machine to obtain the g-C3N4 hollow fiber film, wherein the mass ratio of g-C3N4 nanometer sheets to polymer to organic solvent is 1:(0.2-1):(4-10) and the ratio of shell solution flow speed to core solution flow speed is (0.5-5):1.

The invention relates to an optimized preparation method of a membrane electrode containing an anion exchange resin transition layer used for electrolysis. The membrane electrode subassembly includes a specific combination of an anion exchange resin transition layer, a catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer and an anion exchange membrane. The membrane electrode subassembly prepared by the invention has a good performance when the membrane electrode subassembly uses as alkaline solid polymer electrolyte (AEM) water electrolysis. The membrane electrode has a wide utilization value in regenerative fuel cell (RFC), photoelectrocatalysis and electrolytic hydrogen generator.

The invention discloses a method for preparing a metal-oxide compound nano catalyst by molecular layer deposition. The method comprises the following steps: placing a sample loaded with a metal A precursor into a reaction cavity of molecular layer deposition equipment; feeding a precursor of B, multivariate isocyanate and polyamine into the cavity in sequence to generate layer-by-layer monomolecular layer reaction, and covering a compound of the precursor of A by a B-containing organic-inorganic compound membrane; growing layer by layer, changing the cycle number to adjust the thickness of a B-polyurea hybrid membrane; and removing an organic part of the compound by thermal treatment, reducing to realize high-dispersion mixing of the metal A and nano particles of an oxide B, and forming an interface with a large number of metals A and oxides B. The obtained metal-oxide interface controllable material is higher in performance in catalytic hydrogenation, catalytic oxidation and the like. The method is easy to operate, and the interface site can be adjusted according to the deposition cycle number.

The invention provides an inorganic perovskite quantum dot lighting diode tube, comprising an anode, a hole injection layer, a hole transmission layer, a quantum dot lighting layer, an electronic injection layer and a cathode which are laminated in order; the quantum dot lighting layer is made of halogen surface modified inorganic perovskite quantum dot, and the halogen surface modified inorganic perovskite quantum dot is the quantum dot after a part of organic ligand at the surface of the inorganic perovskite quantum dot is replaced by halogen, wherein the ratio between the halogen and the inorganic perovskite quantum dot is 0.5-12.5 mmol / L: 1 mg.

The invention belongs to the technical field of display application and provides a QLED device, a display device and a preparation method of the display device. The QLED device comprises a substrate,a bottom electrode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, a top electrode and a hole injection layer, wherein the substrate, the bottom electrode, the hole transport layer, the quantum dot light-emitting layer, the electron transport layer and the top electrode are sequentially arranged; the hole injection layer is prepared through doping a hole injection material and an interface-modified material; and the interface-modified material is a p-type conductive material. According to the QLED device, the hole injection layer is prepared through doping the hole injection material and the interface-modified material, so that the hole transport capacity and the ionization energy are improved and the hole injection barrier is reduced, thereby effectively improving the electric conductivity, reducing driving voltage, improving injection balance of charge carriers, simultaneously reducing charges of the device, improving the power efficiency ofthe device and prolonging the service life of the device.

The invention relates to an optimized preparation method of a membrane electrode for electrolysis. A membrane electrode assembly comprises a specific combination of a catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer and a proton exchange membrane. When the membrane electrode assembly prepared through the preparation method is used as the electrolytic tank of the proton exchange membrane (PEM), the good performance is achieved. The preparation method has the wide using value in regenerative fuel cells (RFC), photoelectrocatalysis and electrolytic hydrogen generator units.

The invention provides a composite material of injection-molded plastic and soft magnetic powder and a preparation method of the composite material. The composite material comprises the following components in parts by weight: 80-90 parts of soft magnetic powder, 8-18 parts of high-fluidity plastic, 0.08-0.09 part of a coupling agent, 8-9 parts of a solvent, 1-2 parts of a plasticizer and 0.1-0.3 part of an antioxidant, wherein the melt index of the high-fluidity plastic under the conditions of 300 DEG C and 2.16Kg is greater than or equal to 30g / 10min; and the soft magnetic powder is coated with the coupling agent and the solvent to form a soft magnetic powder coating in the composite material.