Strategies for preparing TiO2/CuS nanocomposites with cauliflower-like protrusions for photocatalytic water purification

Abstract

In this study, TiO₂/CuS nanocomposites with cauliflower-like protrusions were successfully prepared using a simple one-step hydrothermal method with the assistance of 3-mercaptopropionic acid (3-MPA). The TiO₂ and CuS formed heterojunction materials with a stable crystal phase during hydrothermal treatment. The as-prepared TiO₂/CuS was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). Besides, the photocatalytic performance of the nanocomposite material was detected in Rhodamine B (RhB) solution. Results indicate that TiO₂/CuS nanocomposites exhibit higher photocatalytic performance than the TiO₂ and CuS controls, this can be attributed to their distinctive morphology, strong light absorption capacity and effective promotion of the heterojunction between TiO₂ and CuS.