Preparation of C₃N₅ Nanosheets via Molten Salt Method, and Preparation Method and Application of C₃N₅@Sv-ZnIn₂S₄ Composite

Using potassium-lithium-sodium salt and 3-amino-1,2,4-triazole as raw materials, C₃N₅ nanosheets are prepared by molten salt calcination, and then the sulfur vacancy-modified composite material is obtained through liquid phase reaction and sodium borohydride treatment.

This material features a large specific surface area and abundant active sites; the S-scheme heterojunction and sulfur vacancies synergistically improve the separation efficiency of photogenerated carriers, exhibiting an excellent degradation and reduction effect on combined pollutants. Under visible light, it can achieve 98.77% degradation of 2,4-DCP and 100% reduction of Cr⁶⁺ to Cr³⁺ within 40 minutes.