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Open AccessArticle

Synthesis of a Novel Catalyst MnO/CNTs for Microwave-Induced Degradation of Tetracycline

1
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
2
Department of Chemistry and Biotechnology, and Center for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
3
School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(11), 911; https://doi.org/10.3390/catal9110911
Received: 15 October 2019 / Revised: 27 October 2019 / Accepted: 28 October 2019 / Published: 30 October 2019
(This article belongs to the Section Catalytic Materials)
Microwave-induced catalytic degradation (MICD) has been considered as one of the most prospective approaches to remove organic contaminants from water. High-performance catalysts, ideally offering efficient degradation ability, are essential to this process. This work reports the fabrication of manganese oxide on carbon nanotubes (MnO/CNTs) as an efficient catalyst under microwave irradiation (MI) to remove tetracycline (TC) from aqueous solution. The hybrid MnO/CNTs structure shows excellent performance in TC degradation. Combining experimental characterization and theoretical calculations, synergistic mechanisms are revealed: (i) Strong MnO/CNTs interaction stabilizes Mn(II) through interfacial bonding; (ii) high-spin states associated with low coordinated Mn(II) play a major role in MICD; and (iii) superoxide radicals (•O2) and hydroxyl radicals (•OH) induced by microwave input are identified as the major active species. View Full-Text
Keywords: microwave-induced; manganese oxide; catalysts; tetracycline; degradation microwave-induced; manganese oxide; catalysts; tetracycline; degradation
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MDPI and ACS Style

Liu, T.; Yuan, G.; Lv, G.; Li, Y.; Liao, L.; Qiu, S.; Sun, C. Synthesis of a Novel Catalyst MnO/CNTs for Microwave-Induced Degradation of Tetracycline. Catalysts 2019, 9, 911.

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