Hollow tubular Co9S8 grown on In2O3 to form S-scheme heterojunction for efficient and stable hydrogen evolution

Abstract

In this work, an innovative Co9S8/In2O3 composite photocatalyst was prepared by an in-situ grown method. After the composite catalyst loaded with Co9S8 on In2O3 effectively solved the self-agglomeration effect of In2O3 prepared by the method in this work and significantly improved the efficiency of hydrogen production. The useless electrons and holes in Co9S8/In2O3 are removed more effectively than in the other catalyst, so that more highly reducible electrons are involved in the reduction reaction of hydrogen evolution, which is due to the formation of S-scheme heterojunction. The cyclic hydrogen production experiment confirmed that the stability of the composite photocatalyst is excellent, and its 5 h hydrogen production amount reached 277.77 μmol. In this work, a simple synthetic method for the synthesis of composite photocatalysts and new photocatalysts for the photocatalytic hydrogen evolution of dye-sensitized systems (Eosin Y) is presented.