159 results about "Oxidation-reduction process" patented technology

The invention belongs to the field of materials with a hollow structure, in particular to a method for preparing hollow spheres of minerals, metals and organic matters and hollow spheres of compound structures as well as hollow spheres with photic, electrical, magnetic and catalytic properties and hollow spheres with compound structures thereof by taking a polymer hollow sphere as a template through a swelling polymerization method. The invention prepares the compound hollow spheres by taking the polymer hollow sphere as a template and combining sol-gel, settlement reaction and redox process through the method of forcing interface or surface settlement, removes the template polymer through high sintering or selective extraction of a solvent to obtain the hollow spheres of minerals, metals and organic matters. The structure and the size of the hollow sphere can be controlled through controlling the reagent activity, the feeding mode, the reagent concentration and a circulation reaction method; besides, compounding of various matters can be realized; the hollow sphere of the invention not only has good dispersing performance, but also has excellent strength and size stability. The invention relates to the application of the materials with a hollow structure.

A method of fabricating a thin film transistor (TFT) array involves ion replacement by oxidation-reduction processes for implementing the metal wiring layout of TFT-LCDs. This can overcome metal etching difficulties and achieve automatic alignment. The method of the invention replaces traditional lithographic etching techniciues.

The invention discloses a double-membrane slow-release fertilizer containing a biostimulant. The double-membrane slow-release fertilizer is prepared from the following raw materials in parts by weight: 50-60 parts of a double-coated fertilizer, 10-20 parts of diammonium hydrogen phosphate and 14-18 parts of a potash fertilizer; and the double-coated fertilizer is prepared from the following components in parts by weight: 85-95 parts of a fertilizer core, 3-7 parts of a coating agent and 4-6 parts of a second coating agent. The invention further discloses a preparation method of the double-membrane slow-release fertilizer containing the biostimulant. The double-membrane slow-release fertilizer containing the biostimulant has double effects of a fertilizer and a pesticide and is complete in nutrient and balanced in release, fruit tree growth can be promoted, metabolism of fruit trees and absorption and utilization of various nutrients are promoted, absorption and utilization of the fruit trees on the nutrients and moisture of soil are improved, the utilization rate of a fertilizer is significantly improved, diseases and pests of the fruit trees can be effectively prevented and controlled, the oxidation-reduction process in fruit tree bodies is accelerated, and the quality of the fruits is significantly improved, thereby achieving the target of increasing both production and income.

The invention provides a preparation method of a graphene oxide / manganese dioxide composite material. The method comprises the following steps of firstly mixing graphite, an intercalator, an oxidant and water and then reacting to obtain a graphene solution which is not completely oxidized; and then mixing the graphene solution which is not completely oxidized in the previous step and a manganese source again and reacting to obtain the graphene oxide / manganese dioxide composite material. According to the preparation method provided by the invention, a hydrogen peroxide reduction process, a later separate oxidation reduction process and a repeated cleaning process are not needed; and after intercalation and exfoliation of graphite, a one-step oxidation-reduction hydrothermal method is directly utilized to prepare the composite material in situ on the basis of incomplete oxidation, so that the operation steps are greatly reduced, the energy consumption is reduced, the exfoliation time is shortened and the structure dispersity of the composite material is also improved. The preparation method is simple in process, mild in condition, safe, environment-friendly and suitable for large-scale industrial production; and the composite material has relatively good wave absorbing property and absorption width.

The invention relates to the technical field of an organic semiconductor material, and provides a preparation method of a high thermal conductivity graphene thin film. The preparation method comprises the following steps: preparing expanded graphite; mixing the obtained expanded graphite and an organic solvent; carrying out ultrasound dissociation on an expanded graphite organic solvent mixed liquid so as to obtain a graphene microchip suspension liquid; and preparing a graphene thin film by using the graphene microchip suspension liquid. The preparation method has the following advantages that the preparation method is suitable for low-cost industrial large-scale production of the high thermal conductivity graphene thin film, does not refer to high temperature and high pressure and is low in energy consumption; the oxidation-reduction process is not adopted, the lattice structure of the graphene is not damaged, and the obtained product has high thermal conductivity; and meanwhile, as the oxidation-reduction process is not adopted, acid-base or other poisonous effluent is not generated, and the organic solvent can be repeatedly used and is environment-friendly.

A rechargeable battery with aluminium anode containing a non aqueous electrolyte consisting of an ether as solvent and a lithium salt of an imideIt is welt known that the ionisation energy of aluminium to Al3+ is about 12 times as big as the ionisation energy of lithium to Li1+. The redox potential however does not reflect this big difference because of the high enthalpy consumed in the formation of aluminium hydroxide when it goes from the anode to the aqueous electrolyte.Also the use of aqueous electrolyte do not allow the aluminium batteries to be rechargeable, because of the very strong bond between the aluminium and the oxygen atom in the electrolyte.We propose now a rechargeable battery where the aluminium ion is connected to the nitrogen atom of an imide which improves the redox potential by reducing the enthalpy of formation of the aluminium-nitrogen bond in the salt contained in the electrolyte.As there are no hydrogen ions in the electrolyte, we found that the addition of a lithium salt of an imide is necessary to improve the characteristics of the battery.Lithium does not participate in the redox process, it just transports the electric current. The cathode may be carbon or can be made of other metals.

The invention discloses biomass three-dimensional porous graphene and a preparation method thereof. The preparation method comprises the steps: uniformly mixing biomass powder with inorganic salt, performing high-temperature cracking reaction under the protection of inert gas, cooling to room temperature, washing an inorganic salt template with hot water of 90-100 DEG C, filtering, washing to recover molten salt, drying an obtained black solid product, and thus obtaining the biomass three-dimensional graphene. The three-dimensional porous graphene is prepared from the biomass material and thewater-soluble inorganic salt, and biomass cracking is catalyzed by the molten salt, so that the method has the characteristic of short high-temperature cracking time; in the cooling stage, nano or micron salt particles formed by recrystallization of molten salt are used as templates and pore-forming agents for carbon precipitation embedded into the molten salt, high-specific-surface-area three-dimensional graphene is precipitated on the surfaces of salt particles, the preparation process is simple and easy to implement, the preparation period of the three-dimensional graphene can be shortened,and the method is more environmentally friendly compared with a method for preparing graphene through an oxidation-reduction method.