65results about How to "Reaction parameters are easy to control" patented technology

The invention discloses a semiconductor material -Bi2S3/TiO2 nanotube array and a preparation method thereof. Dimethyl sulfoxide (DMSO) containing Bi (NO3) . 5H2O (0.05mol/L-2mol/L), sulfur powder (0.1mol/L-3mol/L) and L-cysteine (0.12mol/L-3mol/L) as plating bath, and Bi2S3 crystals are deposited on a TiO2 nanotube array in a three-electrode system. The Bi2S3/TiO2 nanomaterial with a novel structure can effectively expands the absorption range of TiO2 in a visible light region and reduces the recombination probability of electron hole pair, can produce more photo-generated electrons and photo-generated holes under visible light, and has potential application in solar batteries, solar radiation absorbers, nano switches, thermoelectric photoelectric converters, superconductors, gas sensors and other aspects.

The invention relates to a method for preparing carbon packed magnetic metal nanometer materials. Wherein, it comprises that magnetic metal nanometer particle preparation and carbon package; in the second step, it adds the product of first step into the water solution of carbohydrate, mixing and increasing temperature to 160Deg. C, for 2h, separating, washing and drying. Compared with present technique, the invention has worm liquid carbonization condition, low temperature, the state of metal nanometer particles will not change, and the invention can obtain variable particles. And it can control the ratio between carbohydrate and magnetic metal nanometer particles, to control the carbon layer thickness. The invention has simple structure and short time.

The invention relates to a CuO-NiO/rGO composite material with efficient electro-catalysis oxygen reduction performance, and belonging to the technical field of electro-catalysis materials. In the CuO-NiO/rGO composite material provided by the invention, CuO-NiO nanoparticles are attached to a reduction-oxidized graphene sheet layer, a mass ratio of the CuO-NiO nanoparticles to the rGO is 100:3-5, the sizes of the CuO-NiO nanoparticles are 6-10nm, and the reduction-oxidized graphene sheet layer is a single sheet layer; and the electro-catalysis oxygen reduction performance is provided. Compared with existing oxygen reduction reaction catalysts, the CuO-NiO/rGO composite material provided by the invention is significantly reduced in cost, and is the oxygen reduction reaction catalyst with low price and excellent electro-catalysis oxygen reduction performance. The CuO-NiO/rGO composite material provided by the invention adopts copper salts, nickel salts, hydroxides and oxidized graphene as materials, deionized water and absolute ethyl alcohol as solvents, and glycol as a dispersing agent and a reducing agent, and is synthesized by using a one-pot hydrothermal method. The CuO-NiO/rGO composite material provided by the invention is low in material price, prone to get materials, simple and easy in preparation operation, simple in aftertreatment process, prone to control reaction parameters, short in flow and low in energy consumption.

The invention relates to a TiO2/rGO composite material having the high-efficiency electrocatalytic oxygen reduction performance, and belongs to the technical field of an electrocatalytic material. According to the composite material, anatase phase modified nano-TiO2 (N and F are co-doped in nano-TiO2 crystal lattices) is attached onto the surface of reduced graphene oxide, wherein the mole content of the reduced graphene oxide is 1.5-4.5%, and the mole contents of N and F in the modified nano-TiO2 are 1.07-1.19% and 0.95-1.04% respectively. Compared with simple modified nano-TiO2, the composite material has the high electrocatalytic oxygen reduction performance in an oxygen-saturated 0.1M KOH solution, the onset oxidation potential is about -0.2V, and the maximum oxygen reduction current can reach 10<-5>mA.cm<-2>. Besides, the composite material has the advantages of stable electrocatalytic oxygen reduction performance and high selectivity.

The invention relates to a method for preparing fluorine modified zinc acrylate antifouling resin with self-polishing and low surface energy properties. The method comprises the following steps of: preparing a zinc acrylate monomer from acrylic acid, benzoic acid and zinc hydroxide in molar ratio of 1 to 1 to 1 in the presence of a solvent; reacting components in the following percentage by weight: 10 to 20 percent by weight of zinc acrylate monomer, 4 to 10 percent by weight of fluorine-containing acrylate monomer, 5 to 20 percent by weight of acrylic hard monomer, 10 to 20 percent by weight of acrylic soft monomer, 1 to 5 percent by weight of initiator and 40 to 60 percent by weight of mixed solvent; and the fluorine modified zinc acrylate antifouling resin is produced by free radical polymerization. The technology belongs to the field of marine ship antifouling coatings. The consumption of an expensive fluorine-containing acrylate monomer in the fluorine modified zinc acrylate antifouling resin prepared by the method is only required to account for more than 4 percent by weight of all reactants, namely a contact angle of a resin coating reaches more than 98 degrees, so that the resin coating has the property of a low-surface-energy antifouling coating, and furthermore, production cost is reduced by 10 to 30 percent.

The invention discloses a graphene/antimony sulfide composite photocatalyst preparation method. The method comprises adding graphene oxide into deionized water, carrying out ultrasonic dispersion, adding a sulfur source into the solution, carrying out ultrasonic treatment, adding antimony potassium tartrate into the solution, carrying out magnetic stirring to obtain a reaction mixture, carrying out hydro-thermal treatment on the reaction mixture, carrying out cooling, carrying out centrifugation to obtain black precipitates and washing and drying the black precipitates to obtain the graphene/antimony sulfide composite photocatalyst. The graphene/antimony sulfide composite photocatalyst has good compounding effects and high visible light photocatalytic activity and fully utilizes sun lights and indoor natural lights to realize photocatalytic degradation of environment pollutants. The preparation method has the advantages of simple processes, production process environmental friendliness, easy control of reaction parameters, low enforcement cost and excellent product quality and can be widely used for preparation of a graphene-based composite material.

The invention relates to a CuO/rGO composite material having efficient electrocatalysis oxygen reducing performance and belongs to the technical field of electrocatalysis materials. Nano CuO particles are attached onto a reduced-oxidized graphene sheet layer, a mass ratio of nano CuO and rGO is 100:3-5, size of the nano CuO particles is 6-10nm, the reduced-oxidized graphene sheet layer is a single sheet layer, and the CuO/rGO composite material has electrocatalysis oxygen reducing performance. Compared with existing oxygen reducing reaction catalysts, the CuO/rGO composite material has the advantage that cost is lowered obviously; the CuO/rGO composite material is an oxygen reducing reaction catalyst low in cost and excellent in electrocatalysis oxygen reducing performance. The CuO/rGO composite material is synthesized by taking copper salt, hydroxide and graphene oxide as raw materials, deionized water and anhydrous alcohol as solvents and ethylene glycol as a dispersant and reductant and adopting a hydrothermal one-pot process. The raw materials are low in cost and easy to obtain, preparation operation is simple and easy to implement, aftertreatment process is simple, reaction parameters are easy to control, process is short, and energy consumption is low.

The invention relates to a novel conductive glass fiber material and a manufacturing method of the novel conductive glass fiber material. The novel conductive glass fiber material is characterized in that an antimony-doped tin oxide conductive sol-gel coating layer with uniform and consistent thickness is arranged on an outer surface of a glass fiber. The preparation method comprises the following steps of: step 1, pre-treating the glass fiber by using a glass fiber cleaning and drying technology; step 2, preparing nanometer antimony-doped tin oxide sol by using a sol-gel method; step 3, coating sol on the pretreated surface of the glass fiber by using a sol-gel dip-coating method; and step 4, drying and annealing the glass fiber. According to the novel conductive glass fiber material provided by the invention, the glass fiber is finished by using an antimony-doped tin oxide finishing agent with good properties, so as to achieve good conductivity and transparency. Furthermore, the novel conductive glass fiber material is not limited by the weather condition and the using condition, and is durable. The manufacturing method provided by the invention uses a sol-gel reaction to achieve easily-controlled parameters and temper reaction conditions, and has the advantages of simple process, high production efficiency, stable product quality, low cost, applicability in scale production and the like.

The invention relates to a method for modifying function gelatin. The method comprises steps of: (1) mixing and stirring 3,4-dihydroxybenzoic acid and an solvent (acetone) until the 3,4-dihydroxybenzoic acid is dissolved, adding acetic anhydride to carry out a reflux reaction, and separating the solvent here; (2) stirring and dispersing the product of the step (1) by trichloromethane, adding thionyl chloride to carry out a reflux reaction, and separating the solvent here, wherein the product here is a modifier; (3) heating swelling gelatin until the gelatin turns into a fusion state, adjusting the pH of the gelatin solution to an alkalescence condition by a NaOH solution, uniformly adding the modifier of the step (2) to the gelatin solution at the same time, and carrying out a reaction with stiring; and (4) precipitating the modified function gelatin solution by a sulfur acid solution, washing and fusing, adjusting the pH to 6.0-7.0, and freeze drying the solution here to obtain modified function gelatin. The gelatin modified by a 3,4-dihydroxybenzoic acid modifier provided by the invention is characterized in that, isoelectric points of the gelatin decrease to pH of 1.7-2.1, the gelatin forms a precipitate state in an artificial gastric juice with no disintegration, and the color presents uniform milk white or light red.

The invention relates to an efficient oxidation catalyst for diesel vehicle tail gas purification and a preparation method and application thereof. The active component of the catalyst is a Cu-Mn-Ce-Zr composite oxide, the catalyst is of a mesoporous structure, and the loading capacity of Ce is 30% to 40%, the loading capacity of Mn is 60%-70%, the loading capacity of Cu is 0 to 10%, and the loading capacity of Zr is 0 to 3% in percentages by weight.

The invention relates to a method for removing a phenylurea herbicide chlortoluron in water by an ultraviolet/persulfate combined process. The method comprises the following specific steps: (1) pretreating a water sample containing impurities; and (2) adding a persulfate solution into the pretreated water sample, adjusting the pH value, and carrying out photodegradation on the water sample by using ultraviolet lamp illumination to remove the phenylurea herbicide chlortoluron in the water. Compared with the prior art, the chlortoluron removal effect can reach 99% or above, the concentration ofdegradation-resistant harmful substances in water is effectively reduced, operation is easy, reaction conditions are easy to control, adopted chemical reagents and materials are conventional productsfor water treatment, other toxic and harmful substances are not introduced, and the method is outstanding in safety and practicability. The reaction environment is easy to realize, treatment can be performed at room temperature, so that feasibility and operability of the method are effectively improved.

The invention relates to a preparation method of an acid-etched Ni, Co, Fe ternary metal hydroxide high-performance oxygen evolution catalyst, and specifically relates to a method that firstly a precursor is synthesized by using a hydrothermal method, and then the precursor is converted into the Ni, Co, Fe ternary metal hydroxide electro-catalyst with a relatively large specific surface area, moreactive sites, a nanosheet structure, and a large number of vacancies by an acid etching method. The acid-etched Ni, Co, Fe ternary metal hydroxide high-performance catalyst with the nanosheet structure and a large number of vacancies has the advantages of high reactivity, good electrical conductivity, high stability under alkaline conditions, and the like. The preparation method of the material is simple and easy, equipment is simple, the price of raw materials is low, and repeatability is good.

The invention relates to a preparation method of modified TiO2 with visible light response, and belongs to the technical field of photocatalytic materials. The preparation method is completed by adopting a one-step charge method and a one-step reaction through a constant temperature reaction at a temperature of 190-230 DEG C by using tetrabutyl titanate as a raw material, absolute ethyl alcohol as an organic solvent, urea and/or ammonium fluoride as a modifier and a hydrochloric acid solution or sulfuric acid solution as an acidity regulator. The preparation method is simple and practical in process steps, relatively low in reaction temperature and simple in post-treatment process. The preparation method has the advantages of easily obtained raw materials, easily controllable reaction parameters, short reaction flow and low energy consumption. The particle size of the modified TiO2 with visible light response is between 3 nm and 9 nm, the modified TiO2 with visible light response presents an anatase phase and has obvious absorption in a visible region at the wavelength of 400-600 nm, and the band gap energy is reduced to below 3.0 eV.

The invention discloses a method and device for upgrading heavy oil raw materials by utilizing liquid-phase discharge in-situ hydrogenation. The method comprises the steps that discharge is directly performed in a liquid, liquid-phase discharge hydrogen production is combined with liquid-phase discharge hydrogenation for upgrading heavy oil, a hydrogen production raw material is added into the heavy oil raw materials in a high electric field region of a reactor, liquid-phase high-pressure discharge plasma is utilized to simultaneously decompose the hydrogen production raw material and heavy oil molecules in different regions, active hydrogen free radicals are generated from the hydrogen production raw material in a plasma strong field region to rapidly react with the heavy oil molecules cracked by liquid-phase discharge, correspondingly hydrogen production, cracking of the heavy oil raw materials and in-situ hydrogenation are simultaneously carried out, and therefore the weight reduction of heavy oil is realized. The method has the advantages that in-situ hydrogen production and hydrogenation are realized, the reaction efficiency is high, and the weight reduction rate is effectively increased. Meanwhile, the device can be directly used for fuel oil modification in online application, and liquid and gas products generated by the device can be used as fuels for combustion withoutseparation.

The invention discloses a method for preparing an SnO2 micro-nanofiber. The method comprises the following steps: adding tin salt and hexamethylenetetramine into a water and glycerin mixed solution, performing stirring to obtain a transparent solution, and after solvothermal reaction treatment, performing stirring and heat preservation at 80-90 DEG C to obtain a precursor solution; and after dissolving PVP and stearic acid in a water and DMF mixed solvent, slowly adding the obtained solution into the precursor solution to obtain a precursor spinning solution, selecting appropriate electrospinning parameters to obtain a precursor fiber, and performing heat treatment to obtain the final product. According to the method, the solvothermal method and the electrospinning method are combined to prepare the size-adjustable SnO2 micro-nanofiber formed by stacking of SnO2 micro-nanoparticles. The preparation process is simple and convenient, the reaction parameters are controllable, and the product appearance is obviously different from a fiber structure obtained by use of the pure electrospinning method. The obtained SnO2 micro-nanofiber has a broad application prospect in the fields of catalysis, gas sensitivity and the like.

The invention provides a preparation method of an MOF-derived CoP hydrogen evolution catalyst, and particularly relates to a method which comprises the following steps: firstly, preparing an MOF structure ZIF-67, then carrying out oil bath on the ZIF-67 and cobalt nitrate hexahydrate to generate ZIF-67@Co, then calcining the ZIF-67 or the ZIF-67@Co to generate cobaltosic oxide and then performing phosphorizing or directly performing phosphorizing to obtain the MOF-derived CoP hydrogen evolution catalyst. The MOF-derived CoP hydrogen evolution catalyst prepared by the method disclosed by the invention has relatively high electro-catalytic hydrogen evolution activity and stability.

The invention provides a solid solution nanowire as well as a preparation method and application thereof. The provided solid solution nanowire is InP-ZnSe solid solution nanowire. The preparation method comprises the following steps that (1) a catalyst covers a substrate, moreover, the substrate covered with the catalyst undergoes annealing to obtain an annealed substrate; (2) a mixture of the InPand the ZnSe is placed on one side of a quartz pipe with one end sealed and one end opened, the annealed substrate is placed on the other side of the quartz pipe, the quartz pipe is put into a reaction furnace, protective gas is introduced after vacuumizing is performed, chemical vapor deposition reaction is performed under a heating condition, the solid solution nanowire is obtained, wherein thetemperature of the mixture of the InP and the ZnSe is higher than the temperature of the annealed substrate. The provided solid solution nanowire is uniform in size, good in crystallinity, high in migration rate, adjustable in size of a band gap and can be used in a device, and the use amount of the rare metal In is reduced.

The invention provides a modification method of gelatin, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: carrying out chemical modification by introducing crosslinkable functional groups into gelatin to obtain modified gelatin methacrylate, further reacting a second compound containing intramolecular anhydride functional groups withamino groups in the modified gelatin methacrylate, and introducing carboxyl groups to prepare the gelatin derivative material modified by two anhydrides. Gelatin molecules contain a large number of active functional groups such as amino groups and hydroxyl groups, so that reactive functional groups can be introduced and the solubility can be improved through the chemical modification method.