Version 1
: Received: 9 September 2024 / Approved: 10 September 2024 / Online: 10 September 2024 (14:58:23 CEST)
How to cite:
Liu, T.; Li, C.-X.; Chen, X.; Chen, Y.; Cui, K.; Wang, D.; Wei, Q. Peroxymonosulfate Activation by Fe@N Co-doped BC for the Degradation of Sulfamethoxazole: The Key Role of Pyrrolic N. Preprints2024, 2024090831. https://doi.org/10.20944/preprints202409.0831.v1
Liu, T.; Li, C.-X.; Chen, X.; Chen, Y.; Cui, K.; Wang, D.; Wei, Q. Peroxymonosulfate Activation by Fe@N Co-doped BC for the Degradation of Sulfamethoxazole: The Key Role of Pyrrolic N. Preprints 2024, 2024090831. https://doi.org/10.20944/preprints202409.0831.v1
Liu, T.; Li, C.-X.; Chen, X.; Chen, Y.; Cui, K.; Wang, D.; Wei, Q. Peroxymonosulfate Activation by Fe@N Co-doped BC for the Degradation of Sulfamethoxazole: The Key Role of Pyrrolic N. Preprints2024, 2024090831. https://doi.org/10.20944/preprints202409.0831.v1
APA Style
Liu, T., Li, C. X., Chen, X., Chen, Y., Cui, K., Wang, D., & Wei, Q. (2024). Peroxymonosulfate Activation by Fe@N Co-doped BC for the Degradation of Sulfamethoxazole: The Key Role of Pyrrolic N. Preprints. https://doi.org/10.20944/preprints202409.0831.v1
Chicago/Turabian Style
Liu, T., Dejin Wang and Qiang Wei. 2024 "Peroxymonosulfate Activation by Fe@N Co-doped BC for the Degradation of Sulfamethoxazole: The Key Role of Pyrrolic N" Preprints. https://doi.org/10.20944/preprints202409.0831.v1
Abstract
In this study, Fe, N co-doped biochar (Fe@N co-doped BC) was synthesized by carbonization-pyrolysis method and used as carbocatalysts to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) removal. In the Fe@N co-doped BC/PMS system, the degradation rate of SMX (10.0 mg⋅L−1) was 90.2% within 40 min under optimal conditions. The radical quenching experiments, and electron spin resonance (ESR) analysis suggested that sulfate radicals (SO4•−), hydroxyl radicals (•OH) and singlet oxygen (1O2) participated in the degradation process. After the reaction, the proportion of pyrrolic N apparently decreased from 57.9% to 27.1%. Pyrrolic N served as active sites to break the inert carbon network structure and promote the generation of reactive oxygen species (ROSs). Besides, pyrrolic N showed stronger interaction with PMS and significantly reduced the activation energy required for the reaction (∆G = 23.54 kcal/mol). The utilization potentiality of Fe@N co-doped BC was systematically evaluated in terms of its reusability, and selectivity to organics. Finally, the intermediates of SMX were also detected.
Keywords
Biochar; Sulfate radicals; Peroxymonosulfate; Pyrrolic N
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
