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Evaluation of bias potential enhanced photocatalytic degradation of 4-chlorophenol with TiO2 nanotube fabricated by anodic oxidation method

Authors Wang, Ning View this author's profile
Li, Xinyong
Wang, Yuxin
Quan, Xie
Chen, Guohua View this author's profile
Issue Date 2009
Source Chemical engineering journal , v. 146, (1), 2009, JAN 15, p. 30-35
Summary TiO2 nanotube was fabricated using anodic oxidation method. The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The obtained TiO2 nanotube exhibited increased photoelectrocatalytic (PEC) activities compared to TiO2 film for 4-chlorophenol (4-CP) degradation in aqueous solution. Comparing with electrochemical process (EP), direct photolysis (DP) and photocatalytic (PC), a significant PEC synergetic effect was observed. The factors influencing the degradation of 4-CP by the PEC process including bias potential, pH, initial concentration of 4-CP, UV light intensity and electrolyte concentration were examined. The results revealed that the bias potential played an important role in the degradation of 4-CP and the most efficient degradation of 4-CP was achieved in highly acidic and alkaline medium. Initial concentration of 4-CP was also a significant factor affecting the degradation of 4-CP. Moreover, the degradation rate increased with both UV light intensity and electrolyte concentration increasing. (c) 2008 Elsevier B.V. All rights reserved.
ISSN 1385-8947
Language English
Format Article
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