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Volume 15
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10.3390/catal15050419
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Article

Amorphous MnO2 Supported on CN@SiO2 for Levofloxacin Degradation via a Non-Radical Pathway by PMS Activation

by
Longfei Xia
,
Xilin Wang
,
Jiahui Li
and
Dongyan Xu
*
School of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
*
Author to whom correspondence should be addressed.
Catalysts 2025, 15(5), 419; https://doi.org/10.3390/catal15050419
Submission received: 22 March 2025 / Revised: 15 April 2025 / Accepted: 22 April 2025 / Published: 24 April 2025
(This article belongs to the Special Issue Environmentally Friendly Catalysts for Energy and Water Treatment Applications)
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Abstract

Mn-based catalysts have been extensively studied in advanced oxidation processes based on peroxymonosulfate (PMS) oxidants, demonstrating their significant potential for treating antibiotic-contaminated wastewater. In this study, an amorphous MnO2-based composite catalyst (MnO2/CN@SiO2) was prepared and used to activate PMS for degrading levofloxacin (LEV). The effects of reaction conditions, such as reaction temperature, catalyst dosage, PMS concentration, and solution pH, on LEV degradation were comprehensively investigated. The interference of water components, e.g., NO3−, SO42−, Cl−, CO32−, and humic acid, on the degradation efficiency of LEV was analyzed, and the stability of the catalysts was explored by cycling experiments. Finally, radical quenching experiments and electron paramagnetic resonance spectroscopy were employed to elucidate the contribution of active species to the degradation reaction process. A non-radical-based pathway for LEV degradation was proposed based on these results.
Keywords: amorphous MnO2; levofloxacin; PMS; Fenton-like amorphous MnO2; levofloxacin; PMS; Fenton-like
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MDPI and ACS Style

Xia, L.; Wang, X.; Li, J.; Xu, D. Amorphous MnO2 Supported on CN@SiO2 for Levofloxacin Degradation via a Non-Radical Pathway by PMS Activation. Catalysts 2025, 15, 419. https://doi.org/10.3390/catal15050419

AMA Style

Xia L, Wang X, Li J, Xu D. Amorphous MnO2 Supported on CN@SiO2 for Levofloxacin Degradation via a Non-Radical Pathway by PMS Activation. Catalysts. 2025; 15(5):419. https://doi.org/10.3390/catal15050419

Chicago/Turabian Style

Xia, Longfei, Xilin Wang, Jiahui Li, and Dongyan Xu. 2025. "Amorphous MnO2 Supported on CN@SiO2 for Levofloxacin Degradation via a Non-Radical Pathway by PMS Activation" Catalysts 15, no. 5: 419. https://doi.org/10.3390/catal15050419

APA Style

Xia, L., Wang, X., Li, J., & Xu, D. (2025). Amorphous MnO2 Supported on CN@SiO2 for Levofloxacin Degradation via a Non-Radical Pathway by PMS Activation. Catalysts, 15(5), 419. https://doi.org/10.3390/catal15050419

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