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

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 15 wt% MoS2 exhibits the highest H-2 pro- duction rate of 27.720 mmol g(-1) h(-1), which is 30.7 times higher than CdS alone. This promotion of photo- catalytic 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.