UV�Visible light driven photocatalytic activities of CdS nanoparticles supported ZnO layers

Abstract

CdS nanoparticles (NPs), ZnO layers, and CdS/ZnO composite were successfully prepared by a two-step chemical method. From the analysis of XRD, cubic CdS and the hexagonal ZnO phase were described for the synthesized samples. The CdS/ZnO composite exhibited larger surface area (99.9?m2?g?1) than pure CdS NPs (50.5?m2?g?1) and ZnO layers (67.3?m2?g?1), respectively. The band gap energies evaluated from the DRS results were 3.40, 2.13 and 1.78?eV for pure ZnO, CdS and CdS/ZnO composite respectively. The photocatalytic activity of the prepared materials was studied by the degradation of dye in aqueous solution under UV�Visible light exposure. CdS/ZnO composite exhibited the superior photocatalytic activity than ZnO and CdS. The photocatalytic performance was achieved 91.5% degradation in composite sample.