Construction of MoS2/CdS heterojunction catalysts with crystal plane modulation for photocatalytic coupling of benzylamines under aerobic and anaerobic conditions

Abstract

In this work, using a synergistic modification strategy of facet engineering and constructing heterojunctions, MoS₂/CdS Z-scheme heterojunction catalysts were successfully prepared. The results indicated that CdS-(100) exhibited enhanced photocatalytic benzylamine coupling activity relative to CdS-(002). Compared with pristine CdS, the photocatalytic activity of MoS₂/CdS is significantly enhanced. This enhancement can be attributed to the presence of a Z-scheme heterojunction, which improves the separation efficiency of photogenerated carriers. Moreover, even after 5 cycles, the photocatalyst demonstrates a high photocatalytic activity, which proves that the existence of the Z-scheme heterojunction can effectively inhibit the photocorrosion of CdS. In addition, the reaction can be carried out in different reaction pathways under anaerobic and aerobic conditions. This work proposes a systematic approach for constructing MoS₂/CdS Z-scheme heterojunction photocatalysts and the green synthesis of imines.