Dual cocatalyst modified CdS achieving enhanced photocatalytic H2 generation and benzylamine oxidation performance
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/MoS 2 was synthesized via a facile microwave-assisted approach. Owing to the coexistence of PdS and MoS 2 , respectively serving as oxidation and reduction cocatalyst, PdS/CdS/MoS 2 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.
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