CdS QD Decorated LaFeO ₃ Nanosheets for Photocatalytic Application Under Visible Light Irradiation

Abstract

Abstract Development of a photocatalyst with high activity is one of the key points for both H 2 evolution and RhB dye degradation. To achieve a high‐quality photocatalyst by modifying the structure of the photocatalyst and exploring the electron‐hole mechanism is a great challenge in the field of photocatalysis. Here, we have synthesized a new photocatalyst CdS quantum dot/LaFeO 3 by facile dual‐step solvothermal approach and with cost‐effective raw materials. The monohybrid has a heterostructure of CdS quantum dots(QDs) growing over few‐layer of LaFeO 3 nanosheets uniformly. The photocatalytic activity was noticeably enhanced by the CdS QDs/LaFeO 3 nanocomposite samples. With loading of 1 wt % CdS QDs, 94 % degradation of the RhB has been found just after 1 h irradiation of visible light. In H 2 evolution reaction, 1wt %CdS QDs loaded LaFeO 3 gives the maximum result i. e. 935.5 mmol h −1 . It is due to the fact that in the composite, the rate of charge recombination has been delayed than that of the bare LaFeO 3 and CdS QD.