Enhancing the photocatalytic activity of Cu 0.25 Zn 0.75 S nanodisks by metallic Ag loading in the visible-light region.

Ag-loaded Cu 0.25 Zn 0.75 S (Ag/Cu 0.25 Zn 0.75 S) photocatalysts were synthesized for the photodegradation of organic pollutants such as rhodamine B (RhB), methyl violet (MV) and ciprofloxacin hydrochloride (CIP) under visible-light irradiation. Metallic Ag facilitated the enhancement of the photocatalytic activity of Cu 0.25 Zn 0.75 S nanodisks, and a Ag loading content of 11% exhibited great degradation efficiency for the degradation of RhB with the assistance of H 2 O 2 under acidic conditions. This sample presented slight deactivation for the visible-light-driven degradation of RhB after five cycles. In addition, the excellent photocatalytic activity of Ag/Cu 0.25 Zn 0.75 S was obtained for the removal of MV and CIP. ·O 2 - is mainly responsible for the efficient activity of the photocatalytic process.