6results about How to "Change charge distribution" patented technology

The invention belongs to the field of environmental protection and pollutant treatment, and relates to a method for enriching and detecting microplastics in a surface water body. The lignin is grafted with amido and carboxyl through two-step reaction, firstly, carbon quantum dot active site powder with positive charges on the surface is prepared, the carbon quantum dot active site powder is cross-linked with the modified montmorillonite, and the carbon quantum dot active site microporous adsorbent is prepared, so that the prepared adsorbent has multiple surface functional groups and multiple and uniform active sites, and the adsorption efficiency is improved. The adsorption speed of the micro-plastics in the water body can be increased, the adsorption capacity of the micro-plastics in the water body is improved, and rapid enrichment and separation of the micro-plastics in the water body are realized. Based on the enrichment and separation method, the invention further provides a method for measuring the microplastics in the water environment. According to the invention, rapid filtration, enrichment and detection of micro-plastics in water are realized, the operation is simple and convenient, and the accuracy is high.

The present application relates to the field of flame-retardant cables, and specifically discloses a halogen-free flame-retardant rubber cable material and a preparation method thereof. A preparation method of a halogen-free flame-retardant rubber cable material comprises: S1, ionization treatment: polyurethane liquid rubber, polyamide liquid rubber and xylene are mixed, stirred evenly to form a slurry, and then the slurry is placed in an ionization device for ionization treatment under the action of an electric field; S2, infrared light irradiation treatment: after the ionized raw materials are mixed evenly with a dispersant, a lubricant and an antioxidant, they are placed in an infrared radiation device for infrared light irradiation treatment at 60-80°C; S3, mixing reaction; S4, vulcanization treatment; S5, melt hot pressing. The cable material prepared by the preparation method of the present application effectively improves the mechanical strength of the cable material while ensuring a good flame retardant effect.

This invention provides a permeable reactive wall process and its application for simultaneously removing hexavalent uranium and sulfate from groundwater. The permeable reactive wall process consists of a first treatment unit and a second treatment unit arranged sequentially along the water flow direction. The first treatment unit is filled with a first reaction medium, including zero-valent iron, sulfur-modified coconut shell charcoal, and sulfate-reducing bacteria. The second treatment unit is filled with a second reaction medium, including zero-valent iron, ferric oxide, sulfur-modified coconut shell charcoal, and *Priestia* sp., a non-pathogenic and environmentally friendly bacterium that can simultaneously remove uranium from water through adsorption and reduction. The composite permeable reactive wall process provided by this invention has strong resistance to interference from other substances in the water. When used to simultaneously remove sulfate and hexavalent uranium from groundwater at 15–35°C, the removal rates of both sulfate and uranium in the groundwater are greater than or equal to 90%.

The invention belongs to the technical field of perovskite solar cell material preparation, and particularly relates to a method for inhibiting agglomeration of NiOx dispersion liquid. According to the method, the SnO2 nanoparticles are directly adopted as the additive, operation is convenient, no purification step is needed, and the stable NiOx dispersion liquid can be obtained. The NiOx dispersion liquid prepared by the preparation method disclosed by the invention can be used for effectively inhibiting gathering and providing a longer-time processing window; meanwhile, the NiOx film prepared by using the NiOx dispersion liquid has higher conductivity. Other organic molecules do not need to be introduced into the NiOx dispersion liquid to coordinate with NiOx, so that subsequent SAM molecule attachment is facilitated; and a basis is provided for a high-efficiency perovskite solar cell.

The present invention relates to a nickel-iron co-doped manganese-based Prussian blue positive electrode material and a preparation method and application thereof. The molecular formula of the positive electrode material is: Na2Ni a Fe b Mn c [Fe(CN)6], wherein 0.1≤a≤0.2, 0.4≤b≤0.45, 0.4≤c≤0.45 and a+b+c=1; in a single crystal particle, nickel is enriched outside the particle, manganese is enriched inside the particle, and iron is evenly distributed in the entire particle; the present invention not only effectively improves the structural stability of the manganese-based Prussian blue positive electrode material by designing and modifying the types and distribution of transition metal elements of the positive electrode material, but also improves the sodium ion diffusion power of the positive electrode material and improves the electrochemical performance of the material.

The application relates to a catalyst for preparing 2,5-dihydroxymethyl tetrahydrofuran and a preparation method and application thereof, which comprises the following steps: (1) preparing a ruthenium salt solution, a nickel salt solution, mixing the two solutions with 1-ethyl-3-methyl imidazole chloride (Etmim)Cl in an acid solution, and carrying out ultrasonic treatment to obtain [Etmim]RuNiCl6; (2) under stirring, the [Etmim]RuNiCl6 is added dropwise into carbon nanotubes (CNTs), and after mixing, aging and drying, a catalyst is prepared. The catalyst is used for preparing 2,5-dihydroxymethyl tetrahydrofuran from 5-hydroxymethyl furfural, and has the advantages of high raw material conversion rate, high selectivity of target product and good stability of the catalyst.