Evaluation of bias potential enhanced photocatalytic degradation of 4-chlorophenol with TiO2nanotube fabricated by anodic oxidation method

Ning Wang, Xinyong Li, Yuxin Wang, Xie Quan, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

121 Citations (Scopus)

Abstract

TiO2nanotube 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 TiO2nanotube exhibited increased photoelectrocatalytic (PEC) activities compared to TiO2film 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.
Original languageEnglish
Pages (from-to)30-35
Number of pages6
JournalChemical Engineering Journal
Volume146
Issue number1
DOIs
Publication statusPublished - 15 Jan 2009
Externally publishedYes

Keywords

  • 4-Chlorophenol
  • Photoelectrocatalytic
  • TiO nanotube 2
  • UV light

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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