Photocatalytic synthesis of carbamo(dithioperoxo)thioates via a Z-scheme H2WO4/CsPbBr3 heterojunction

Abstract

A Z-scheme heterojunction photocatalyst integrating H₂WO₄ and CsPbBr₃ is rationally designed for the mild photocatalytic synthesis of carbamo(dithioperoxo)thioates. This heterogeneous system drives three-component coupling of thiols, amines, and CS₂ at ambient temperature using air as the sustainable oxidant, completely eliminating stoichiometric chemical oxidants. The enhanced photocatalytic performance stems from the efficient charge separation and migration enabled by H₂WO₄ nanosheets, which suppress charge recombination and promote the generation of reactive oxygen species (˙O₂⁻).