5 results about "Copper bromide" patented technology

This invention discloses an aqueous copper-ion battery electrolyte, its preparation method, and the copper-ion battery itself. The electrolyte comprises a copper salt, a solvent, and a copper halide salt additive. The copper salt is copper sulfate, and the solvent is deionized water. The concentration of the copper salt in the electrolyte is 0.5–1.5 mol / L. The copper halide salt additive is selected from one or more of copper fluoride, copper chloride, and copper bromide, and the total concentration of the copper halide salt additive in the electrolyte is 0.005–0.2 mol / L. When the electrolyte of this invention is used in an aqueous copper-ion battery, the halide ions in the copper halide salt additive can preferentially adsorb onto the surface of the metallic copper anode, inducing uniform copper deposition and inhibiting the formation of by-products. This significantly improves the coulombic efficiency and cycle stability of the aqueous copper-ion battery. Furthermore, the electrolyte preparation process is simple, low-cost, and environmentally friendly, making it suitable for large-scale energy storage scenarios.

The application provides a fluorinated cyclodextrin macromolecular adsorbent and a preparation method and application thereof, and belongs to the technical field of lithium ion adsorbents, and aims to solve the technical problems of poor lithium ion adsorption effect and low selectivity of existing lithium adsorbents. The preparation steps of the application comprise the following steps: firstly, dissolving beta-cyclodextrin in an organic solvent and reacting with 2-bromoisobutyryl bromide to obtain an intermediate product bromoisobutyryl beta-cyclodextrin; and then, performing a polymerization reaction on the bromoisobutyryl beta-cyclodextrin with a fluorine-containing monomer, copper bromide, N,N,N',N",N"-pentamethyldiethylenetriamine and tin (II) isooctoate to obtain a beta-cyclodextrin adsorption material with a surface grafted fluorine-containing polymer chain. The preparation method has the advantages of simple process and mild reaction conditions. The adsorption material has a high lithium ion adsorption capacity, which can reach 43.5 mg / g, and can efficiently and selectively recover lithium ions from a complex solution containing competitive ions such as sodium, potassium, magnesium, calcium and cobalt.

This invention relates to a photoelectrocatalytic reaction device without external bias and its applications, belonging to the field of energy materials and catalysis technology. The invention utilizes nanosheet nickel hydroxide, prepared by electrodeposition on hydrophilic carbon paper, as a catalyst for the oxidation of 5-hydroxymethylfurfural (HMF). A binuclear copper molecule is synthesized as a carbon dioxide (CO2) reduction catalyst via a reflux reaction of 1,2-bis(diphenylphosphine)benzene and copper bromide. The HMF oxidation catalyst is connected to the anode of a triple-junction gallium arsenide battery, encapsulated, and placed in the anode chamber. A hydrophobic carbon paper loaded with the binuclear copper molecule catalyst is connected to the cathode. Under no external bias, the anode efficiently oxidizes HMF to FDCA (2,5-furandicarboxylic acid) through the synergistic effect of nickel hydroxide and tetramethylpiperidine oxide (TEMPO), while the cathode simultaneously reduces CO2. This system exhibits high selectivity, high conversion rate, and excellent catalytic efficiency. The device is reusable, and the catalyst preparation is simple and the raw materials are inexpensive and readily available.

The application relates to a synthesis method of 4,4'-dibromo-octafluorobiphenyl and belongs to the field of organic synthesis. The synthesis method comprises two steps: A, in an organic solvent, full-fluorobiphenyl is reacted with hydrazine hydrate under the action of a catalyst to obtain 4,4'-dihydrazino-octafluorobiphenyl; B, 4,4'-dihydrazino-octafluorobiphenyl is reacted with copper bromide in a hydrobromic acid solution, a crude product is separated, and 4,4'-dibromo-octafluorobiphenyl is obtained through recrystallization. The process is suitable for industrial production, raw materials are easy to obtain, conditions are mild, the yield is high, waste is little, and the requirement for equipment is low.