Dual cocatalyst modified CdS achieving enhanced photocatalytic H2 generation and benzylamine oxidation performance
By Sun, Binshu; Zheng, Jianhong; Yin, Dewu; Jin, Huile; Wang, Xin; Xu, Quanlong; Liu, Aili; Wang, Shun
Published in Applied Surface Science
2022
Abstract
Cocatalyst can greatly facilitate the charge separation efficiency and decrease the activation barrier of a specific reaction, thus contributing the improved photocatalytic performance. Herein, PdS/CdS/MoS2 was synthesized via a facile microwave-assisted approach. Owing to the coexistence of PdS and MoS2, respectively serving as oxidation and reduction cocatalyst, PdS/CdS/MoS2 displayed enhanced photocatalytic performance in both hydrogen production (6610 μmol·g−1·h−1) and benzylamine oxidation (87% conversion) in comparison with the individual and binary composite counterparts. The improved photocatalytic activity was mainly attributed to the high charge separation efficiency and lowed activation barrier. Furthermore, the introduction of PdS can timely extract photogenerated holes from CdS, which effectively inhibits the photo-corrosion of CdS, endowing it with high stability. This work paves the way for developing efficient chalcogenide photocatalysts.