35results about How to "Fast migration rate" patented technology

The invention discloses a hollow tubular carbon nitride photocatalyst and a preparation method and application thereof. The hollow tubular carbon nitride photocatalyst is prepared from urea and melamine by hydrothermal and calcination, wherein the molar ratio of urea to melamine is (1-5):1. The hollow tubular carbon nitride photocatalyst has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, high light absorption capacity, high photocatalytic activity and the like. The novel visible light photocatalyst is novel in morphology and structure and excellent in photocatalytic performance. The preparation method of the hollow tubular carbon nitride photocatalyst has the advantages that the process is simple, operation is easy, the cost is low and no secondary pollution is caused. The method is suitable for large-scale preparation and facilitates industrialized application. The photocatalyst can degrade organic pollutants, can achieve the efficient removal of the organic pollutants, and has the advantages of being simple in process, convenient to operate, low in cost, high in processing efficiency, good in removal effect and the like. The photocatalyst has good application value and prospects.

The invention discloses an AlGan material-based ultraviolet photoelectric detector structure and a manufacturing method thereof, which are mainly used for solving the problem of the dependence on a P-type doping material in the prior art. A detector comprises a substrate (1), a transition layer (2), a GaN buffer layer (3), an aluminum component gradual change AlGaN layer (4) and an active layer (5) from bottom to top, wherein the aluminum component gradual change AlGaN layer (4) is partitioned into an upper layer and a lower layer; the thickness of the lower layer is 20-30 nanometers, and thecontent of an aluminum component increases from 0 percent to 80-100 percent; the thickness of the upper layer is 10-20 nanometer, and the content of the aluminum component is 0-80 percent; the left upper side of the aluminum component gradual change AlGaN layer (4) is covered by the active layer (5); a bottom ohmic contact (7) is deposited on the right upper side of the aluminum component gradualchange AlGaN layer (4); a gap (8) is formed between the ohmic contact and the active region; the active region (5) consists of an AlGaN material with the aluminum component content of 0-80 percent; the thickness of the active region (5) is 50-100 nanometers; and a surface ohmic contact electrode (7) is deposited on the surface of the active region. The detector structure has the advantages of capability of automatically working in a photovoltaic mode, high high-frequency characteristic and small dark current, and can be applied to optical signal detection in ultraviolet wavebands between 226 nanometers and 363 nanometers.

The invention discloses a MOS transistor and a manufacturing method therefor. In order to improve the carrier migration rate of the MOS transistor, the size of an opening of a bowl-shaped groove is controlled during the forming of a sigma-shaped groove, so as to enable the size of the opening to be greater than the distance between side walls of the adjacent grid structures. In other words, the size of the opening of the bowl-shaped groove is controlled to be great as much as possible, thereby enabling the size of the opening of the sigma-shaped groove formed by the corrosion of the bowl-shaped groove to be greater, enabling pressure stress materials or tensile stress materials placed in a source-drain region to be more, enabling the tensile stress or pressure stress applied to a trench to be greater, and enabling the carrier migration rate to be greater.

The invention belongs to the field of electrochemistry, and specifically relates to a functional diaphragm applied to improve the electrochemical performance of lithium-sulfur batteries. By coating metal copper and conductive agents on the diaphragm, it can react with polysulfide ions and make it stable as a positive electrode. The functional separator of the active material can greatly improve the cycle stability of the lithium-sulfur battery. In addition, the construction of the functional separator can only be realized by highly commercial methods such as coating and sputtering. The preparation process is simple and is very suitable for large-scale mass production applications.

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst, which comprises the following steps: the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and organic pollutant wastewater or bacteria solution are mixed for photocatalytic treatment to finish the treatment of the organic pollutant or bacteria, the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst is prepared by taking hollow tubular carbon nitride as a carrier and the carrier is loaded with modified carbon quantum dots, wherein the hollow tubular carbon nitride is prepared from urea and melamine in a molar ratio of 1-5:1 and melamine through hydrothermal treatment and calcination. The method has the advantages of simple process, convenient operation, simple equipment, low cost, high treatment efficiency / photocatalysis efficiency, good removal effect / sterilization effect, cleanness, no pollution and the like, and has high application value and commercial value.

The invention provides a flame retardant organic electrolyte for a rechargeable zinc battery and a rechargeable zinc battery, the flame retardant organic electrolyte for a rechargeable zinc battery includes a soluble zinc salt, a sodium salt electrolyte salt and a flame retardant An organic solvent, the concentration of the soluble zinc salt is 0.1-2 mol / L, and the concentration of the sodium salt electrolyte salt is 0.1-2.5 mol / L. The flame retardant organic electrolyte solution of the present invention has suitable conductivity, viscosity, cation migration rate, high voltage window and excellent flame retardancy, can realize uniform deposition of metal zinc, and improve Zn deposition / precipitation coulombic efficiency and atom utilization rate , showing good electrochemical reversibility and compatibility with cathode and anode materials. The flame retardant organic electrolyte is applied to Zn / / Na 3 V 2 (PO 4 ) 2 o 2 In the F rechargeable zinc battery system, the safety of the battery can be significantly improved, and this zinc battery system has a high discharge voltage platform and good cycle stability, and has broad application prospects.

Preparation of graphene-coated silver powder by hydrothermal method and preparation method of graphene-coated silver powder modified lead-free slurry. The invention relates to a preparation method of graphene-coated silver powder and its use to prepare slurry and preparation of slurry. method. The purpose of the present invention is to solve the problem that the particle size of the silver powder used in the existing positive silver slurry is micron level, and there are a large number of gaps in the middle of the silver powder, which reduces the effective contact between the silver particles and increases the series resistance of the electrode and the existing crystalline silicon The conductive paste required for solar cells contains metallic lead and is expensive. Preparation method of graphene-coated silver powder: 1. Preparing silver powder; 2. Preparing graphene oxide; 3. Preparing graphene-coated silver powder through hydrothermal reaction. The graphene-coated silver powder modified lead-free slurry is prepared by weight parts from 50 to 95 parts of graphene-coated silver powder, 1 to 20 parts of glass powder and 10 to 20 parts of organic carrier; the present invention can obtain Graphene-coated silver powder and its modified lead-free paste.

The invention discloses a carbon quantum dots-polyaniline / carbon fiber integrated composite material, its preparation method and application. According to the invention, the polymerizable aniline monomer acts together with the conductive carbon quantum dots under an integrated reaction to form a carbon quantum dots-polyaniline integrated composite material. The carbon quantum dots-polyaniline nano-wire composite materials are directly grown on the surface of a carbon fiber's conductive substrate and are connected to each other to form a 3D mesh structure. The carbon quantum dots are evenly distributed in the inner surface of the polyaniline nanometer array, and the carbon quantum dots-polyaniline / carbon fiber integrated composite materials can be directly used as super capacitor's electrode materials free of non-adhesive agent to achieve the storage of electrochemical energy. The existence of carbon quantum dots not only improves the conductivity of polyaniline nanometer array material, but also provides favorable support for polyaniline molecules, strengthens the mechanical strength of polyaniline, slows down the damage degree of its main chain in a long cycle and enhances the cycle life of polyaniline electrode materials.