47results about How to "Uniform and controllable shape" patented technology

The invention discloses a novel method for performing a copolymerization reaction of dicyclopentadiene and maleic anhydride, and belongs to the technical field of copolymers. The method comprises the following steps of: under the protection of nitrogen, adding monomers and an initiator into an organic medium and dissolving, reacting for 2 to 12h at the temperature of between 60 and 90 DEG C to obtain a self-stabilizing dispersion system of monodisperse microspheres of an alternating copolymer, and performing centrifugal separation, and drying to obtain a white solid of the dicyclopentadiene / maleic anhydride alternating copolymer, wherein the reaction monomers are the dicyclopentadiene and the maleic anhydride, and the molar ratio of the two monomers is 5:1-1:5; the medium is a mixed solvent of organic acid alkyl ester and organic alkane, and the organic acid alkyl ester accounts for 30 to 70 volume percent of the mixed solvent; and a chemical structure is that: R1 is a hydrogen atom, C1-C5 alkyl, phenyl or benzyl, and R2 is C1-C5 alkyl. A stabilizer and a costabilizer are not required to be added, the reaction system is simple, and a product is easy to separate; and polymer microspheres have smooth and clean surfaces, uniform particle sizes, controllable appearances, and high dispersibility.

The invention relates to a method for preparing TiO2 / SiO2 aerogel micro ball doping with iron, wherein it dissolves TiOSO4 and FeCl3 into deionized water, adjusts pH value to 7-8, to obtain deposits; washes deposits, adds nitric acid solution, mixes at 50-90Deg. C to obtain TiO2 sol doping with iron; adds nitric acid into silicasol and absolute ethyl alcohol to prepare SiO2 alcohol sol; then mixes titanium sol with SiO2 alcohol sol at 1:3-8 volume ratio, adds formamide, mixes to obtain TiO2 / SiO2 composite sol; mixes skellysolve C / skellysolve B, siban 80, tuwen 85, butanol / hexanol at 1000:1-10:0.1-1:25-100, to obtain the oil phase; then adds TiO2 / SiO2 composite sol into oil phase, to make pH at 7-10, to obtain the TiO2 / SiO2 gel micro ball; washes with acetone and dries, to obtain the TiO2 / SiO2 aerogel micro ball at 10-200micrometer diameter. The invention has simple process and low cost.

The invention belongs to the technical field of gas sensors, and in particular relates to a ZnO-SnO2-Zn2SnO4 porous nanofiber gas sensitive material and a preparation method and application thereof. According to the invention, the ZnO-SnO2-Zn2SnO4 porous nanofiber gas sensitive material is prepared by adopting an electrostatic spinning method in combination with a high heat treatment heating rate.The preparation method is simple, few in process, easy to operate and relatively good in room-temperature gas sensitivity. The invention further provides the application of the ZnO-SnO2-Zn2SnO4 porous nanofiber gas sensitive material in the aspect of detecting or sensing an alcohol gas at room temperature. The ZnO-SnO2-Zn2SnO4 porous nanofiber gas sensitive material is prepared into a ZnO-SnO2-Zn2SnO4 gas sensor, and the sensor has obvious response and high selectivity to alcohol at room temperature.

The invention discloses a fluorescent dual-response hollow mesoporous material and a preparation method and application thereof. The method comprises the steps that a rare earth vanadate microsphere is synthesized through a self-sacrificial template method, and then a cefradine complex of terbium is loaded in the rare earth vanadate microsphere, so that characteristic emission peaks of europium ions in the rare earth vanadate microsphere (GdVO4:Eu<3+>) and terbium ions in the cefradine complex of terbium coexist, and the luminous intensity of all the characteristic emission peaks does not influence each other, that is to say, the hollow mesoporous material has the fluorescent dual-response function. Accordingly, by detecting calcium pyridine-2,6-dicarboxylic acid (CaDPA) through the fluorescent dual-response hollow mesoporous material, anthrax is identified; compared with the methods such as infrared spectroscopy and Raman scattering spectroscopy, the method is simpler and more convenient; by means of the method, under the ultraviolet light, alteration of fluoresence can be observed with naked eyes, and the detection results can be judged.

The invention discloses a preparation method for cuboid-shaped indium oxide single crystal, which belongs to the hydro-thermal method and consists of the steps of preparing a feature control agent, preparing indium saline solution, preparing a precursor, offcenter separation, calcination, natural cooling, etc. By using the feature control agent, the invention solves the problems that the feature of a sample is difficult to control and easy to collapse and the crystal formed is polycrystal when the hydro-thermal method is used in the prior art; preparing the cuboid-shaped indium oxide single crystal with a controllable feature by using the hydro-thermal method is realized; Owing to the invention, the decentrality of the obtained indium oxide single crystal is good; the feature is uniform and controllable; the preparation method of the invention is simple; the raw material is easy to get; the cost is low; the single crystal of the invention can be suitable for a large scale of industrialized production.

The invention relates to the technical field of new energy materials, in particular to a stannous phosphate battery negative electrode material and a preparation method and application thereof. The invention provides a preparation method of a stannous phosphate battery negative electrode material, which specifically comprises the following steps: obtaining a tin-containing phosphonic acid metal organic framework (MOF) through a one-step hydrothermal method or a solvothermal method, namely taking the tin-containing phosphonic acid MOF material as a single precursor; then a composite negative electrode material with Sn3 (PO4) 2 uniformly dispersed in a phosphorus-doped carbon skeleton, namely the Sn3 (PO4) 2-atPC negative electrode material, is finally prepared through one-step calcination heat treatment, and the negative electrode material is uniform and controllable in morphology and well inherits the microstructure of the precursor; anions in Sn3 (PO4) 2 can be used as a matrix for buffering volume change to prevent pulverization of the electrode material, so that the cycle life is prolonged; after calcination, the carbon skeleton has good conductivity, and the cycling stability of the Sn3 (PO4) 2-atPC negative electrode material is enhanced; and meanwhile, when the material is applied to a sodium ion battery or a potassium ion battery, the material has relatively high charge-discharge specific capacity and good cycle stability.

The invention relates to a nickel sulfide-cadmium sulfide nanowire heterostructure and a preparation method thereof and belongs to the technical field of preparation of new energy materials. According to the composite material provided by the invention, the main body is the cadmium sulfide nanowire, and dentritic beta-NiS sheets are attached to the surface. The material has excellent capacity of performing visible catalytic decomposition on water to produce hydrogen. The preparation method comprises the following steps: preparing the cadmium sulfide nanowire by a solvent thermal process; taking the obtained cadmium sulfide nanowire as a template, taking nickel acetate as a nickel source, taking thiourea as a sulfur source, taking sodium hypophosphite as a reducing agent, uniformly growing beta-NiS nanosheets on the surface of cadmium sulfide in a hydrothermal environment, thereby obtaining the nickel sulfide-cadmium sulfide nanowire heterostructure with tight combination and dispersing uniformity. The product obtained by the method is high in yield, high in purity and controllable in morphology and does not need after-treatment; and moreover, the method has the advantages of simplicity in equipment and process, strict and controllable synthetic growth conditions, high product yield, low cost, clean and environmental-friendly production process and the like.

The invention discloses a method for preparing a Sm(OH3)3 / CuO nano composite by a microwave-hydrothermal process, which comprises the following steps: dissolving analytically pure Sm(NO3)3.6H2O and Cu(NO3)2.3H2O in a mole ratio of 1:0.2-1:2 in deionized water to obtain a solution A: regulating the pH value of the solution A to 7-13 by using analytically pure sodium hydroxide, and continuing stirring for 1-2 hours to form a reaction precursor solution; pouring the reaction precursor solution into a hydrothermal kettle, sealing the kettle, putting in a microwave-hydrothermal reaction instrument (MDS-10), reacting at 100-200 DEG C for 1-2 hours, and after the reaction finishes, naturally cooling to room temperature; and carrying out centrifuge washing on the product sequentially with deionized water and anhydrous ethanol 4-6 times, and carrying out vacuum drying on the collected product at 60-80 DEG C for 0.5-2 hours, thereby obtaining the Sm(OH3)3 / CuO nano composite. The method has the advantages of accessible raw materials, low cost, simple technological equipment, low energy consumption and high speed.

The invention discloses a preparation method of a nanocomposite, and particularly provides a rapid preparation method of NiMoO4 / C nanofibers. The rapid preparation method of the NiMoO4 / C nanofibers comprises the following steps: step 1, (NH4)6Mo7O24.4H2O, Ni(Ac)2.4H2O and citric acid are added to a DMF solvent, the mixture is ultrasonically oscillated and stirred, and a disperse solution is obtained; step 2, PVP is added to the disperse solution and stirred to be uniform, and a to-be-reacted solution is obtained; step 3, the obtained to-be-reacted solution is subjected to electrospinning, and polymer metal salt composite fibers are obtained and dried in a vacuum manner; step 4, the product dried in a vacuum manner is calcined in air and decomposed at a high temperature, and the NiMoO4 / C nanofibers are obtained. A NiMoO4 / C nanocomposite with good continuity can be prepared with the method for preparing the NiMoO4 / C nanofibers through electrospinning. The product has excellent electrochemical performance, and electrical conductivity and cycle performance of the product are improved by introducing C, so that the product has better application prospect in the field of energy storage.

The invention relates to a preparation method of a nano rare earth oxide. The preparation method comprises the following steps: 1) mixing a rare earth salt and a precipitating agent respectively witha betaine type surfactant to obtain a solution A and a solution B; 2) mixing the solution A and the solution B to obtain a rare earth precipitate; 3) calcining the rare earth precipitate obtained in the step 2) to obtain the nano rare earth oxide. In the preparation method, the betaine type surfactant is added. Through addition of the betaine type surfactant, the surface tension of the solutions can be effectively reduced, the agglomeration phenomenon of nanoparticles can be improved, and micelles with different structures can be formed in the aqueous solutions by use of different concentrations of the surfactants, and can be used as templates, so that the morphology and the size of the nanopowder material can be controlled, and the nano rare earth oxide with uniform and controllable morphology can be obtained.

The invention discloses a manganese phosphate nano material and a rapid preparation method and application thereof, and the rapid preparation method comprises the following steps: adding a manganese-containing inorganic salt solution into a basic culture medium, and carrying out mineralization reaction at 25-42 DEG C for a certain time; and centrifuging the obtained reaction liquid, collecting, washing and precipitating to obtain the manganese phosphate nano material. The manganese phosphate nano material is prepared by adopting a biomimetic mineralization strategy, the method is simple, conditions are safe, mild and controllable, the prepared manganese phosphate nano material is uniform in size and morphology, and cell experiments prove that the prepared manganese phosphate nano material has good biocompatibility.

The invention discloses a preparation method for a platinum-silver alloy hollow nanoflower. The method comprises the following steps: taking sodium polyacrylate as a stabilizer and taking ascorbic acid as a reducing agent; reducing silver nitrate at the room temperature to synthesize a silver nanoflower; and introducing potassium chloroplatinite as a platinum source through galvanic reducing process, thereby directly obtaining the platinum-silver alloy hollow nanoflower. The preparation method is simple and economical; the obtained platinum-silver alloy hollow nanoflower is regular in shape and is uniform in dimension, has ultrahigh catalytic activity and stability in an alkaline formic acid fuel cell, has a potential application prospect in the fuel cell field, and is suitable for industrial large-scale production.

A method for preparing a bismuth-molybdenum bimetallic sulfide, a negative electrode material for a sodium ion battery, comprising the following steps: (1) weighing a bismuth source and a molybdenum source at a molar ratio of Bi:Mo=2:1, and then adding In the diol container, stir to dissolve, mix the ethylene glycol solution dissolved with bismuth source and molybdenum source, and stir to form a uniform mixed solution; (2) Add absolute ethanol to the mixed solution, stir evenly, and place in the reaction Solvothermal reaction in the still; (3) Centrifugal washing and drying; (4) Place the bismuth molybdenum oxide precursor in the corundum ark and in the middle of the tube furnace, and place a For the corundum ark of the sulfur source, the tube furnace is sealed and the reducing gas is introduced. After heat treatment, it is naturally cooled to room temperature. The invention has short process flow, controllable parameters, simple equipment, wide sources of raw materials, and environmental friendliness, and bismuth-molybdenum bimetallic sulfide materials with different nanoscales can be obtained by adjusting relevant parameters.

The invention discloses a composite nanomaterial as well as a preparation method and application thereof. The composite nanomaterial comprises noble metal nanoparticles and flower-shaped molybdenum disulfide nanosheets, the noble metal nanoparticles are loaded on the surfaces of the flower-shaped molybdenum disulfide nanosheets; the precious metal comprises at least one of gold, silver, palladium, platinum, iridium, ruthenium and rhodium. The composite nano material disclosed by the invention has the characteristics of stable physical and chemical properties, large specific surface area and high catalytic activity; a reducing agent is introduced through a metal in-situ growth method, flower-shaped molybdenum disulfide nanosheets react with the reducing agent and a precious metal source to synthesize the flower-shaped molybdenum disulfide-precious metal nanocomposite which is controllable in morphology and can be produced in batches, and the synthesis method has the advantages of being simple in step, efficient, rapid and capable of being produced in batches; the composite nano material can be applied to biosensing, antibiosis, cancer treatment and colorimetric catalysis.

The invention discloses an open-width mercerizing device used for a cotton weft plain knitted fabric and a mercerizing method and belongs to the textile printing and dyeing pretreatment technology field. According to the coil form changes of different areas and structure parameters, the density of an area mesh surface is adjusted so as to ensure that the force of each fabric unit is the same and the coil form changes are uniform. During a traditional mercerizing process, a fabric stress is not uniform and the coil form changes are uneven. In the invention, the above problems are solved. Simultaneously, the mixed liquor of an alcohol organic solvent and water is used to prepare a sodium hydroxide solution, and ultrasonic assisted treatment is used so that sodium hydroxide easily and uniformly penetrates in a cotton fiber and the uniformity of swelling is ensured. The cotton knitted fabric processed by the method of the invention has good glossiness, good dyeing performance, excellent softness, stable size and good wrinkle resistance, and a coil form is uniform and controllable. The alcohol organic solvent adopted in the invention is safe and non-toxic, and is easy to recycle, economic and energy saving are achieved, and the safety and environmental protection are realized.