期刊
CATALYSTS
卷 9, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/catal9110911
关键词
microwave-induced; manganese oxide; catalysts; tetracycline; degradation
资金
- Beijing Natural Science Foundation [2192048]
- National Natural Science Foundation of China [41831288]
- National Key R&D Program of China [2017YFB0310704]
- Fundamental Research Funds for the Central Universities [2652017338]
- Guangdong Innovation Research Team for Higher Education [2017KCXTD030]
- High-level Talents Project of Dongguan University of Technology [KCYKYQD2017017]
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 (center dot O-2(-)) and hydroxyl radicals (center dot OH) induced by microwave input are identified as the major active species.
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