Z-scheme driven of MoS2/Co3O4 nano-heterojunction for efficient photocatalysis hydrogen evolution and Rhodamine B degradation

Abstract

In this work, we reported a promising process for the fabrication of MoS2/Co3O4 nano-heterojunction for greatly effective photocatalysis performance. Especially, the optimized nanocomposites display great hydrogen production capability, which is over 13.4-folds and 11.5-folds (MoS2/Co3O4 nano-heterojunction) greater than that of pristine MoS2 and pristine Co3O4 catalysts, respectively. The as-fabricated MoS2/Co3O4 nanocomposites exhibit excellent operation towards hydrogen production (3,825 μmol/g) and Rhodamine B（RhB) photodegradation (Kapp constant of 0.04 min−1), which are nearly one order of magnitude larger than the traditional pristine MoS2 and Co3O4 photocatalysts, respectively. The delivery pathway of photoinduced charges, the production route and the capacity of numerous reactive species (like.O2−, and.OH radical) are itemized and considered. This effort provides a new perspective for the construction and design of a more powerful nano-heterojunction photocatalyst with robust visible light absorption ability.