Facile formation of Mo-vacancy defective MoS2/CdS nanoparticles enhanced efficient hydrogen production

Abstract

In this work, a novel Mo vacancy defective MoS2 loaded on CdS nanoparticles were obtained by a facile hydrothermal method. The photocatalytic performance of the prepared composites was evaluated from the perspective of decomposing water to produce H2. The experimental result showed that the release rate of H2 with defect MoS2/CdS composites is 11,750 μmol g−1h−1, which is 1.3 and 15.3 times higher than that of MoS2/CdS composites without defect (Mo) and pure CdS, respectively. The defective (Mo) vacancies formed on the MoS2 surface due to partly oxidized by potassium permanganate. The synergistic interaction of defect MoS2/CdS composites exhibited significant photocatalytic hydrogen production performance. The possible photocatalytic hydrogen production mechanism of the defect MoS2/CdS was suggested. This study provides a new way to prepare efficient hydrogen production photocatalysts based on defective metal vacancy.