33results about How to "No follow-up" patented technology

The invention discloses a method for preparing biochar / carbon nano-tubes for cathode materials for sodium ion batteries. The method includes (1), washing pomelo peel, clearing impurities on the surfaces of the pomelo peel and cutting the pomelo peel to obtain uniform pieces A; (2), carrying out freeze drying on the uniform pieces A to obtain pieces B; (3), adding concentrated sulfuric acid into the pieces B, then adding carbon nano-tubes into the pieces B, carrying out ultrasonic treatment on the pieces B, then arranging the pieces B in homogenous-phase equipment and carrying out homogenous-phase reaction to obtain reaction products C; (4), carrying out suction filtration on the reaction products C, drying the reaction products C, then shifting the reaction products C into a tube atmosphere furnace and carbonizing the reaction products C to obtain carbonization products D; (5), respectively carrying out soaking, washing and suction filtration on the carbonization products D by the aid of deionized water and absolute ethyl alcohol and then drying the carbonization products D to obtain the cathode materials for the sodium ion batteries. The cathode materials are of three-dimensional nano-tube structures. The method has the advantages that the biochar / carbon nano-tubes prepared by the aid of the method are homogenous in composition and high in purity and are of the three-dimensional nano-tube structures, sodium ion diffusion paths can be effectively shortened by the three-dimensional nano-tube structures, and accordingly the capacity and the cyclic stability of the sodium ion batteries can be improved.

The invention belongs to the technical field of environment protection, particularly relating to a method for removing nitrite ions. The method comprises the following steps: adding nitrified crude containing the nitrite ions into water to be fully stirred, or adding waste water containing the nitrite ions into water to be fully stirred; measuring the content of nitrous acid and nitric acid in an aqueous phase layer or waste water; and adding sulfamic acid into the aqueous phase layer or the waste water to cause the molar ratio of total amount of nitrous acid and nitric acid to sulfamic acid to be 1:1-1.5, wherein stirring time is at least 0.5 hour. The method breaks the nitrite ions generated by nitrification, neutralization and washing with sulfonamides so as to solve the technical problems that the original neutralization-urea washing-rinsing technology has high nitrite ion content in nitrate and can not reach the requirements of products, and waste water amount generated by multiple washing is large, is easy to pollute environment and the like.

Disclosed is a preparation method of a hexagon snow shaped WO3 nanometer disc. Firstly, tungsten powder is added into hydrogen peroxide solution, after the reaction is finished, filtrate in a beaker is collected and labeled as solution A. Deionized water is added into the solution A and the solution A is diluted to obtain solution B; the solution B is poured into a microwave hydrothermal reactor,and then is put into a MDS-8 type temperature-pressure double control microwave hydrothermal reaction machine. The temperature control mode is selected for reaction, after the reaction is finished, the solution B is cooled to the room temperature naturally. The hydrothermal reactor is opened, after the product is centrifugated, supernatant is removed and precipitate is collected, then the productis rinsed a plurality of times by using deionized water and absolute ethanol or deionized water and isopropanol, at last the product is soaked in absolute ethanol, and is dried in an electrothermal blowing dry box, then the snow shaped WO3 nanometer disc is obtained. The reaction of the invention is finished by one step, the subsequent treatment is not needed, the preparation period is short, andthe process equipment is simple, the cost is low, the repeatability is high, the reaction temperature is low, the energy consumption is low and the production cost is saved.

The invention relates to a method for extracting ursolic acid from a glossy privet fruit through supercritical carbon dioxide. The method comprises the processes of pre-treatment, feeding, heating, boosting, analysis and computation and the like. The glossy privet fruit is crushed and placed in an extraction kettle of a supercritical carbon dioxide extraction device, the temperatures and the pressures of the extraction kettle and separation kettles are set respectively, extractants are collected from the separation kettles after the extraction time is up, the weights of the extractants are weighed, quantitative analysis is performed on ursolic acid through the high performance liquid chromatography and the percentage composition of ursolic acid is calculated. The method has the technical advantages that supercritical carbon dioxide is adopted to extract ursolic acid from the glossy privet fruit, follow-up treatment is avoided, the extraction efficiency is high, the color state is good, and the process is stable and good in repeatability.

The invention belongs to the technical field of preparation of carbon quantum dot materials, and discloses a method for synthesizing solid carbon quantum dots by gaseous detonation. The method comprises the following specific steps: taking citric acid as a carbon source, taking urea as a nitrogen source, mixing the two substances and tiling into a gaseous detonation tube; sealing the gaseous detonation tube and then vacuumizing; simultaneously heating the gaseous detonation tube to 60 DEG C or above; respectively filling the inner part of the gaseous detonation tube with hydrogen and oxygen asa detonation source; stopping heating the gaseous detonation tube and detonating hydrogen and oxygen mixed gas in the tube; after the gaseous detonation tube is cooled to 80 DEG C or less, opening the gaseous detonation tube and collecting yellow solid on the tube wall, namely the solid carbon quantum dots. The method has the advantages of simplicity, high efficiency, no need of subsequent processing and capability of synthesizing the solid carbon quantum dots on a large scale. The solid carbon quantum dots synthesized by the method disclosed by the invention do not need any matrix, and can emit fluorescence directly under the excitation of an ultraviolet lamp.

The present invention is a low-viscosity epoxy toughening agent based on acrylate and aliphatic amine, which is composed of 1-50 parts of octylamine, 1-50 parts of dodecyl primary amine, 1-50 parts of oil-based primary amine by weight. A product obtained by reacting an amine with 40-100 parts of a diacrylate compound, and the viscosity of the low-viscosity epoxy toughening agent is 50-1000 centipoise. The low-viscosity epoxy toughener of the invention is prepared based on an addition polymerization reaction, and has the advantages of fast reaction, no solvent, no subsequent treatment, and no introduction of other impurities. By adjusting the feeding ratio of primary alkyl amine and diacrylate compound, the molecular weight and viscosity of the toughening agent can be controlled. The prepared epoxy toughening agent has the advantages of significantly reducing the viscosity of epoxy adhesive, good toughening effect and low water absorption. Etc.