Recyclable CuO@CSs as highly efficient peroxymonosulfate activator for Rhodamine B degradation. (January 2023)

• Record Type: Journal Article
• Authors: Han, Xinning; Liu, Xuerui; Li, Shuye; Li, Zhenliang
• Is Part Of: Journal of physics and chemistry of solids. Volume 172(2023)
• Publication Date: 2023-01
• Subjects: Advanced oxidation processes -- Peroxymonosulfate -- CuO -- Rhodamine B; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2022.111098
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: A high stable and efficient catalyst of CuO@CSs (carbon silicion sphere@CuO) was prepared through in-situ growth methods. CuO@CSs as a heterojunction was conducive to activate PMS efficiently. 15 ppm of RhB was completely removed after 2 min with 0.5 mM peroxymonosulfate (PMS) under UV–visible light irradiation. The reusability of catalyst was evaluated through recycling tests, and the RhB degradation efficiency ranged from 99.96% to 99.37% after five cycles. 1 O2 and O2 −were detected by trapping experiments and electron paramagnetic resonance (EPR) in the photocatalytic degradation, which have worked together in the removal of RhB. Furthermore, the CuO@CSs/PMS was applied to treat natural water containing RhB, which was completely decomposed within 8 min. The possible photocatalytic degradation mechanism for the RhB was investigated. The degradation pathway of RhB was deduced through LC-MS results, it was concluded that CuO@CSs was a recyclable catalyst to activate PMS and remove organic pollution. Highlights: CSs@CuO revealed perfect degradation efficiency, 15 ppm of RhB was completely degraded within 2 min with 0.5 mM PMS under UV–visible light irradiation. CSs@CuO exhibited good reusability by recycling tests. CSs@CuO displayed outstanding photocatalytic performance for removing RhB from raw water.