Oxygen vacancy-rich CeO2 decorated with Cu3BiS3 nanoparticles: Outstanding visible-light photocatalytic performance towards tetracycline degradation

Abstract

Recently, the degradation of antibiotics has attracted a lot of attention all over the world, because the accumulation of these recalcitrant compounds in the environment, and their entry into the food chain have severely affected on human health. Herein, oxygen vacancy-rich CeO<inf>2</inf> was decorated with Cu<inf>3</inf>BiS<inf>3</inf> nanoparticles to fabricate Z-scheme CeO<inf>2-x</inf>/Cu<inf>3</inf>BiS<inf>3</inf> photocatalysts with a simple procedure. Intriguingly, photocatalytic ability of CeO<inf>2-x</inf>/Cu<inf>3</inf>BiS<inf>3</inf> (30%) nanocomposite in the detoxification of tetracycline hydrochloride, cephalexin, azithromycin, and rhodamine B was elevated 31.3, 28.2, 45.2, and 10.1-folds as much as CeO<inf>2</inf>, and 5.19, 5.97, 32.2, and 4.69-folds compared with the CeO<inf>2-x</inf> photocatalyst, respectively. The admirable activity of CeO<inf>2-x</inf>/Cu<inf>3</inf>BiS<inf>3</inf> (30%) nanocomposite was ascribed to the production of many charge carriers, efficacious segregation and transfer of charges, and improved textural features, which were confirmed by UV–vis DRS, EIS, photocurrent density, PL, and BET analyses. In addition, the TC degradation pathway was investigated with LC-MS analysis, and also the biocompatibility of the purified solution was displayed with wheat seed cultivation. Regarding outstanding activity and facile synthesis, the CeO<inf>2-x</inf>/Cu<inf>3</inf>BiS<inf>3</inf> (30%) photocatalyst could be utilized for wastewater treatment. © 2023 Elsevier B.V., All rights reserved.