期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 775, 期 -, 页码 292-298出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2016.06.023
关键词
Porous boron-doped diamond; Electrochemical oxidation; Triphenylmethane dye; Electrolyte composition
资金
- National Natural Science Foundation of China [21273097, 21573093]
- Science Foundation of Jilin Province of China [20130204003GX]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120061110015]
The aim of this study is to investigate the electrochemical degradation and decolorization of triphenylmethane dyexylenol orange (XO) on boron-doped diamond (BDD) electrodes. A series of parameters, including electrode materials, current density, initial dye concentration and electrolyte composition, are examined to discuss the effect of these factors in terms of chemical oxygen demand (COD) removal, current efficiency and decolorization rate. Complete decolorization and mineralization of XO could be realized on BDD electrodes while the oxidation is mass transfer controlled, and the degradation progress performs better performance in case of porous BDD electrode comparing with flat BDD electrode. The enhancement of effectiveness is highly correlated to the structure of electrode material, where porous BDD film provides more active sites for hydroxyl radicals. The presence of Cl- in the solution promotes the COD and color removal due to the formation of active chlorine. Porous Ti/BDD electrode presents the excellent potential in electrochemical decolorization and mineralization of triphenylmethane dye. (C) 2016 Elsevier B.V. All rights reserved.
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