3 results about "Cadmium sulfide" patented technology

The application relates to the cross field of photocatalytic composite materials and soil environment remediation technology, and specifically discloses a three-dimensional graphene aerogel loaded cadmium sulfide quantum dot composite material, a preparation method and application of the composite material in soil cadmium pollution remediation, the composite material is composed of a three-dimensional interconnected porous sulfur-doped graphene aerogel skeleton and in-situ anchored cadmium sulfide quantum dots, the cadmium sulfide quantum dots have a particle size of 2-10 nm, a loading amount of 10 wt%-25 wt%, a surface sulfur vacancy density of 5%-8%, the skeleton has a sulfur atom content of 2 at%-5 at%, and the two are connected through a carbon-sulfur-cadmium covalent bridge; the material has a hierarchical porous structure with longitudinal through macropores of 20-80 mu m and intrawall mesopores of 2-20 nm, the material is prepared by adopting a three-stage programmed hydrothermal method, and a sulfur source is released in stages by 30%-50% excess thioacetamide to drive the formation of an epoxy group nucleophilic ring-opening anchor point, in-situ nucleation of quantum dots and generation of surface sulfur vacancies.

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.

This invention discloses a zinc-cadmium sulfide solid solution, its preparation method, and its applications. The preparation method of the zinc-cadmium sulfide solid solution of this invention includes the following steps: 1) dissolving a zinc source and a cadmium source in water to obtain a zinc-cadmium source solution; 2) dissolving a sulfur source in the zinc-cadmium source solution to obtain a precursor solution; 3) adding an alkaline solution to the precursor solution, followed by a hydrothermal reaction, and then separating, purifying, and drying the product to obtain the zinc-cadmium sulfide solid solution. The zinc-cadmium sulfide solid solution of this invention has advantages such as high catalytic efficiency and good stability, making it suitable for photocatalytic water splitting to produce hydrogen. Furthermore, its preparation method is simple, the reaction conditions are mild, the reproducibility is good, and the production cost is low, making it suitable for large-scale industrial production and application.