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Self-Assembly of CdS/CdIn₂S₄ Heterostructure with Enhanced Photocascade Synthesis of Schiff Base Compounds in an Aromatic Alcohols and Nitrobenzene System with Visible Light

Qiaoqiao Zhang, Jinxin Wang, Xiangju Ye, Zhenzhen Hui, Longqiang Ye, Xuchun Wang, Shifu Chen
ACS applied materials & interfaces 2019 v.11 no.50 pp. 46735-46745
alcohols, cadmium sulfide, composite materials, irradiation, light, nitrobenzenes, photocatalysis, photocatalysts, schiff bases
A series of novel CdS/CdIn₂S₄ composite materials were prepared via a one-pot solvothermal process. The as-obtained photocatalysts were characterized by several techniques and the photocatalytic properties of CdS/CdIn₂S₄ photocatalysts were studied by photocascade synthesis of Schiff base compounds in a photocatalytic reaction system of aromatic alcohols and nitrobenzene irradiated with visible light. The results reveal that the resulting CdS/CdIn₂S₄ heterostructure samples show outstanding photocatalytic activities toward the photocascade production of Schiff base compounds in an aromatic alcohols and nitrobenzene reaction system irradiated with visible light. An optimized 50.0% CdS/CdIn₂S₄ heterostructure sample shows the highest Schiff base yield of 42.0% irradiated with visible light for 4 h, which is approximately 19.1 and 1.54 times higher than those of sole CdS and CdIn₂S₄ samples, respectively. The fabrication of heterogeneous structure improves the spatial separation and migration of photoinduced electron–hole pairs, thus contributing to the enhancement of photocatalytic properties. We foresee that this finding can offer a strategy to develop heterostructure composites for efficient synthesis of organics by photocatalysis under mild conditions.