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https://hdl.handle.net/2440/136383
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Type: | Journal article |
Title: | Peroxymonosulfate oxidation via paralleled nonradical pathways over iron and nitrogen doped porous carbons |
Author: | Wang, J. Zhao, Y. Li, C. Yu, Z. Zhang, Y. Li, Y. Tan, X. Liu, S. Wang, S. Duan, X. |
Citation: | Science of the Total Environment, 2022; 836:155670-1-155670-11 |
Publisher: | Elsevier BV |
Issue Date: | 2022 |
ISSN: | 0048-9697 1879-1026 |
Statement of Responsibility: | Jun Wang, Ying Zhao, Chunting Li, Zijun Yu, Yang Zhang, Yuan Li, Xiaoyao Tan, Shaomin Liu, Shaobin Wang, Xiaoguang Duan |
Abstract: | Hierarchically porous iron/nitrogen-doped carbons (Fe-N-PC) were developed for the oxidation of ibuprofen (IBP) with peroxymonosulfate (PMS). The incorporation of trace-level iron and nitrogen dopants promoted the catalytic per- formance remarkably, leading to 4.8, 16.4 and 22.9-fold enhancement over N-doped carbon (N-PC), porous carbon (PC), and Fe-doped carbon (Fe-PC), respectively. Fe(III) was anchored in nitrogen-coordinated pots (Fe-Nx) in the sp2-hybridized carbon network, and graphitic-N could synergistically boost the catalysis. Notably, methyl phenyl sulf- oxide (PMSO) transformation, quenching tests, in situ electrochemical analysis and Raman spectroscopy verified high- valent iron-oxo species and direct electron transfer pathway accounted for pollutant oxidation. The relationship be- tween the kinetic constants (lnkobs) and the oxidation peak potential (Eop) of pollutants was established with good cor- relation, manifesting particular selectivity toward oxidizing electron-rich pollutants and great immunity to background inorganic ions and natural organic matters (NOMs) for real wastewater treatment. The deactivation mechanisms of Fe-N-PC were revealed via surface oxidation and dopant refabrication. This work delicates to deepen the understanding of the nonradical mechanisms and structure-oriented PMS activation by engineered carbonaceous materials. |
Keywords: | Porous carbon Peroxymonosulfate High-valent iron-oxo species Nonradical pathway Electron-transfer process |
Rights: | © 2022 Elsevier B.V. All rights reserved |
DOI: | 10.1016/j.scitotenv.2022.155670 |
Grant ID: | http://purl.org/au-research/grants/arc/DE210100253 |
Published version: | http://dx.doi.org/10.1016/j.scitotenv.2022.155670 |
Appears in Collections: | Chemical Engineering publications |
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