氧氟沙星
介孔材料
恩诺沙星
催化作用
化学
浸出(土壤学)
环丙沙星
锰
核化学
降级(电信)
辐照
分解
光催化
抗生素
有机化学
土壤科学
核物理学
土壤水分
物理
电信
生物化学
计算机科学
环境科学
作者
Anqi Wang,Hui Wang,Hao Deng,Shu Wang,Wei Dong Shi,Zixiao Yi,Rongliang Qiu,Kai Yan
标识
DOI:10.1016/j.apcatb.2019.02.034
摘要
Controllable synthesis of mesoporous manganese oxide (MnOx) microsphere is successfully achieved using a soft-template P123 assisted method. The as-obtained MnOx materials are highly efficient and versatile to remove the category of fluoroquinolone antibiotics (i.e., ofloxacin, ciprofloxacin, enrofloxacin and levofloxacin) using peroxymonosulfate (PMS) as the oxidant under UV or simulated sunlight irradiation. The mesoporous Mn3O4 microsphere prepared in the presence of 2 g P123 (P2-Mn3O4) exhibits the superior catalytic activity with almost perfect degradation for the fluoroquinolone antibiotics in 10 min under UV irradiation. Moreover, under simulated sunlight irradiation, 74.5% of ofloxacin, 79.4% of ciprofloxacin, 72.3% of enrofloxacin and 81.9% of levofloxacin can be degraded by P2-Mn3O4 in 10 min. Besides, the P2-Mn3O4 catalyst maintains stable without the obvious deactivation of catalytic activity or structural change after several successive runs, and slight leaching of Mn ions is observed. The ESR spectra further document that SO4−, OH, O2− and 1O2 radicals are prominent in the decomposition process of antibiotic molecules. In the end, the reaction kinetic and rational degradation pathway are also investigated and proposed.
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