期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 157, 期 -, 页码 203-208出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2015.11.021
关键词
Cu-doped Bi2O3/Bi-0; Fenton-like; (OH)-O-center dot radicals; 2-Chlorophenol
资金
- National Natural Science Foundation of China [21407165, 51278527, 21125731, 51138009, 51538013]
- National 863 Project of China [2012AA062606]
- Key Laboratory of Drinking Water Science and Technology, Chinese Academy of Sciences [15Z04KLDWST]
Cu-doped Bio(x) composites were prepared with and without citric acid. In the presence of citric acid, Bi-0 and Cu2+/Cu+ were confirmed to coexist in the composite (BiCu9/Bi-0) by X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst showed high Fenton activity and stability for the degradation and mineralization of 2-chlorophenol in the pH range of 6-8. H2O2 was predominately converted into (OH)-O-center dot radicals in BiCu9/Bi-0 suspension, as assessed by the electron spin resonance technique. In the composite, Bi-0 inhibited the oxidation of H2O2 by CO+ into O-2 and (OH)-O-center dot by reducing Cu2+, enhancing the reaction of H2O2 with Cu+ to produce (OH)-O-center dot. Intermediate determination showed that 2-chlorophenol was decomposed mainly by (OH)-O-center dot radicals into hydroxylation products, subsequently decomposed into short-chain organic acids, and eventually decomposed into CO2 and H2O. (C) 2015 Elsevier B.V. All rights reserved.
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