期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 317, 期 -, 页码 686-694出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.06.004
关键词
Microscaled catalyst; CuFeO2; Peroxymonosulfate; Oxidative degradation; Carbamazepine
资金
- National Natural Science Foundation [21377169, 21507168]
- Natural Science Foundation of Hubei Province of China [2015CFB505]
Microscaled CuFeO2 particles (micro-CuFeO2) were rapidly prepared via a microwave-assisted hydrothermal method and characterized by scanning electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy. It was found that the micro-CuFeO2 was of pure phase and a rhombohedral structure with size in the range of 2.8 +/- 0.6 mu m. The micro-CuFeO2 efficiently catalyzed the activation of peroxymonosulfate (PMS) to generate sulfate radicals (SO4 center dot-), causing the fast degradation of carbamazepine (CBZ). The catalytic activity of micro-CuFeO2 was observed to be 6.9 and 25.3 times that of micro-Cu2O and micro-Fe2O3, respectively. The enhanced activity of micro-CuFeO2 for the activation of PMS was confirmed to be attributed to synergistic effect of surface bonded Cu(I) and Fe(III). Sulfate radical was the primary radical species responsible for the CBZ degradation. As a microscaled catalyst, micro-CuFeO2 can be easily recovered by gravity settlement and exhibited improved catalytic stability compared with micro-Cu2O during five successive degradation cycles. Oxidative degradation of CBZ by the couple of PMS/CuFeO2 was effective in the studied actual aqueous environmental systems. (C) 2016 Elsevier B.V. All rights reserved.
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