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- Title
Peroxymonosulfate Activation by Bi-Fe Oxide Co-Doped Graphitic Carbon Nitride for Degradation of Sulfamethoxazole: Performance and Mechanism.
- Authors
Wang, Zhili; Liang, Lan; Li, Ning; Wu, Shuang; Cheng, Zhanjun; Yan, Beibei; Chen, Guanyi
- Abstract
Graphite carbon nitride (g-C3N4) has been employed as an emerging metal-free catalyst in heterogeneous catalysis. However, the catalyst has a poor activation property for peroxymonosulfate (PMS). In this study, Bi-Fe oxide co-doped g-C3N4 (Bi@Fe/CN) was synthesized for PMS activation to degrade sulfamethoxazole (SMX). In particular, Bi@Fe/CN-3 presented remarkable catalytic performance with 99.7% removal of SMX within 60 min in the PMS system. Additionally, Bi@Fe/CN-3 presented good stability and recyclability through the cycling experiments. Moreover, it was shown that free radicals (O2•−, •OH, and SO4•−) and non-free radicals (1O2) were the primary active species in the Bi@Fe/CN-3/PMS system. Bi, Fe, and surface lattice oxygen were confirmed to be the main contributors to the active species. This work elucidates the mechanism of activation of PMS by Bi@Fe/CN-3, which is beneficial to promote the application of bimetallic oxide-modified g-C3N4/PMS systems in wastewater treatment.
- Subjects
PEROXYMONOSULFATE; DOPING agents (Chemistry); SULFAMETHOXAZOLE; HETEROGENEOUS catalysis; NITRIDES; HETEROGENEOUS catalysts
- Publication
Applied Sciences (2076-3417), 2024, Vol 14, Issue 8, p3181
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app14083181