Hierarchical MoS @TiO Heterojunctions for Enhanced Photocatalytic Performance and Electrocatalytic Hydrogen Evolution.

Hierarchical MoS @TiO heterojunctions were synthesized through a one-step hydrothermal method by using protonic titanate nanosheets as the precursor. The TiO nanosheets prevent the aggregation of MoS and promote the carrier transfer efficiency, and thus enhance the photocatalytic and electrocatalytic activity of the nanostructured MoS . The obtained MoS @TiO has significantly enhanced photocatalytic activity in the degradation of rhodamine B (over 5.2 times compared with pure MoS ) and acetone (over 2.8 times compared with pure MoS ). MoS @TiO is also beneficial for electrocatalytic hydrogen evolution (26 times compared with pure MoS , based on the cathodic current density). This work offers a promising way to prevent the self-aggregation of MoS and provides a new insight for the design of heterojunctions for materials with lattice mismatches.