Construction of visible-light-driven ternary ZnO-MoS2-BiVO4 composites for enhanced photocatalytic activity

In this study, ZnO-MoS2-BiVO4 composite was prepared with pure ZnO and pure MoS2 for the comparison and upswing of photocatalytic activity against rhodamine B (RHB) dye. These materials were characterized by X-ray diffraction (XRD) for structural analysis. Scanning electron microscopy (SEM) shows that the ZnO-MoS2-BiVO4 composite possesses excellent flower-like morphology for the photocatalytic treatment. BET surface area of the sample shows that ZnO-MoS2-BiVO4 composite has a maximum surface area which in turns provide more surface sites for the adsorbent of pollutant. Optical properties were examined with the UV visible spectroscopy. The photocatalytic treatment showed that ZnO-MoS2-BiVO4 composite exhibited maximum photocatalytic efficiency for the RhB dye which may attributed to its enhanced surface area and small band gap.