Co9S8/CdS heterostructures as efficient photocatalysts for degradation of organic pollutant

Because of its superior coupling and composition matching, narrow band gap semiconductor heterojunction can increase redox activity, reduce carrier recombination, and enhance light absorption. When heterojunction photocatalysts are constructed properly, it is thought to be an efficient technique to boost photocatalytic activity. The Co9S8/CdS heterostructures in this study were created using a two-step solvothermal technique. The as-prepared Co9S8/CdS heterostructures exhibit outstanding photocatalytic degradation performance of methyl orange (MO) owing to their unique structure and compositional properties. Co9S8/CdS heterostructures can offer a remarkable MO degradation rate that can reach 97% in 25 min when illuminated by visible light. In addition to demonstrating better long-term stability after numerous cycling photocatalytic tests, experiments with radical trapping have shown that ·O2− is crucial for the photocatalytic degradation of MO. The pertinent photogenerated charge transfer and catalytic mechanisms of Co9S8/CdS heterostructures are suggested and examined.