4 results about "Cadmium salt" patented technology

This invention relates to the field of materials preparation technology, specifically disclosing a method for preparing tungsten-molybdenum alloy powder based on a coprecipitation precursor. The method involves mixing sodium tungstate, sodium molybdate, and water to prepare a tungsten-molybdenum mixed solution; mixing the tungsten-molybdenum mixed solution with a precipitant solution containing zinc or cadmium salts, and allowing the tungsten and molybdenum to coprecipitate under stirring; filtering and washing the reaction slurry to obtain a wet precipitate of tungsten-molybdate coprecipitate, with the filtrate serving as the mother liquor; drying and grinding the wet precipitate of tungsten-molybdate coprecipitate to obtain tungsten-molybdate coprecipitate powder; and reducing the tungsten-molybdate coprecipitate powder in a hydrogen stream at 700-1000°C to obtain tungsten-molybdenum alloy powder and zinc or cadmium vapor. This invention combines the reduction and alloying reactions into one, with a reaction temperature below 1000°C, shortening the tungsten-molybdenum alloy powder preparation process and significantly saving energy and reducing consumption.

The application belongs to the technical field of photoelectric materials, and particularly relates to a yttrium-doped CdS thin film and a preparation method and application thereof. The preparation method of the yttrium-doped CdS thin film comprises the following steps: adding a cadmium salt solution, ammonia water and a thiourea solution into water in sequence and stirring uniformly to obtain a mixed solution; immersing a conductive substrate on which a P-type chalcogenide compound absorption layer thin film is formed into the mixed solution, and performing initial deposition through water bath heating; taking out the conductive substrate after the initial deposition, immersing it into a yttrium salt solution first, and then depositing it in the mixed solution, repeating the immersing and depositing operations for 4-6 times, and washing and drying to obtain the yttrium-doped CdS thin film. The yttrium-doped CdS thin film prepared by the application is used as a buffer layer for a CZTSSe solar cell, and a photoelectric conversion efficiency of 15.19% is achieved.

The application provides a water-based cadmium ion-vanadium dioxide battery and a preparation method and application thereof, and relates to the field of marine energy storage.The application comprises a negative electrode, a positive electrode, a diaphragm and a water-based electrolyte; the negative electrode is metal cadmium or a cadmium-based alloy; the active substance of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the water-based electrolyte is an aqueous solution containing cadmium salt; and the total concentration of the cadmium salt in the water-based electrolyte is 1-4 mol / L.The water-based vanadium dioxide-cadmium metal secondary battery has the advantages of a safe water-based electrolyte system, high rate performance and super-long cycle life, and has significant advantages in marine energy storage.

The application relates to the technical field of high-purity inorganic nanomaterial preparation, and discloses a controllable preparation method of high-purity cadmium telluride nanocrystals, which comprises the following steps: pre-dissolving a conjugate acid salt in an aqueous phase reaction system, introducing ammonia as an inorganic gaseous ligand, and making a cadmium salt precursor and a tellurium source precursor react; the ammonia and the conjugate acid salt construct a pH buffer system, transiently stabilize the generated cadmium telluride nanocrystals in a pH range for inhibiting cadmium hydroxide impurities; and the ammonia and the conjugate acid salt are physically removed after the reaction. The application decouples the ligand stability function of the ammonia from the alkaline side reaction of the ammonia by constructing an in-situ pH buffer system, prevents agglomeration while inhibiting impurities, and completely removes the ligand and the salt after the reaction, so that the technical problem that controllability and high purity cannot be achieved simultaneously in the inorganic aqueous phase method is solved.