Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/2418
Title: Effects of dissolved oxygen, pH, and anions on the 2,3-dichlorophenol degradation by photocatalytic reaction with anodic TiO₂nanotube films
Authors: Liang, Hai-chao
Li, Xiang-zhong
Yang, Yin-hua
Sze, Kong-hung
Subjects: Anion
Dissolved oxygen
Photodegradation
TiO₂nanotube
2,3-Dichlorophenol
Issue Date: Oct-2008
Publisher: Elsevier
Source: Chemosphere, Oct. 2008, v. 73, no. 5, p. 805-812.
Abstract: In this study, the highly-ordered TiO₂nanotube (TNT) arrays on titanium sheets were prepared by an anodic oxidation method. Under UV illumination, the TNT films demonstrated the higher photocatalytic activity in terms of 2,3-dichlorophenol (2,3-DCP) degradation in aqueous solution than the conventional TiO₂thin films prepared by a sol–gel method. The effects of dissolved oxygen (DO) and pH on the photocatalytic degradation of 2,3-DCP were investigated. The results showed that the role of DO in the 2,3-DCP degradation with the TNT film was significant. It was found that 2,3-DCP in alkaline solution was degraded and dechlorinated faster than that in acidic solution whereas dissolved organic carbon removal presented an opposite order in dependence of pH. In the meantime, some main intermediate products from 2,3-DCP degradation were identified by a ¹H NMR technique to explore a possible degradation pathway. A major intermediate, 2-chlororesorcinol, was identified from the 2,3-DCP decomposition as a new species compared to the findings in previous reports. (See Article file for details of the abstract.)
Rights: Chemosphere © 2008 Elsevier. The journal web site is located at http://www.sciencedirect.com.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/2418
DOI: 10.1016/j.chemosphere.2008.06.007
ISSN: 0045-6535
Appears in Collections:CEE Journal/Magazine Articles

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