Synthesis of hierarchical SnS2@SnO2 heterojunction on carbon-fiber cloth for efficient removal of Cr(VI) ions from aqueous solution

Enhanced photocatalytic performance of SnS2 under visible light irradiation: strategies and future perspectives

“…Several strategies have been developed to enhance Cr( vi ) removal, including vacancy generation, 48 doping formation, 128 and heterostructure formation. 129 The basic mechanism of Cr( vi ) reduction involves the generation of electrons and holes upon irradiation, where the photoexcited electrons can directly decompose Cr( vi ) ions into Cr( iii ). The photocatalytic ability of SnS 2 depends on the extent to which electrons react with Cr( vi ) molecules, which may be attributed to increasing active sites or improving charge carrier separation efficiency.…”