Photocatalytic H2 Evolution on CdS modified with partially crystallized MoS2 under visible light irradiation

Abstract We report a facile route to obtain MoS2/CdS heterostructure and tested for hydrogen production activity under visible light irradiation. The MoS2/CdS heterostructure containing 15wt% MoS2 exhibits the highest H2 production rate of 27.720 mmol g-1h-1, which is 30.7 times higher than CdS alone.This promotion of photocatalytic activity can be assigned to the modification of MoS2 on CdS surfaces by forming interfacial interactions, which effectively inhibits the recombination of photo-generated electrons and holes. Meanwhile, MoS2 exhibits a partially crystallized status, providing abundant exposed edges with coordinatively unsaturated S and Mo atoms as the photocatalytic active sites, thus facilitating hydrogen production.