Journal of Solid State Electrochemistry

, Volume 17, Issue 1, pp 63–68 | Cite as

Photoelectrocatalytic degradation of 3-nitrophenol at surface of Ti/TiO2 electrode

  • Reza Ojani
  • Jahan-Bakhsh Raoof
  • Akbar Khanmohammadi
  • Ebrahim Zarei
Original Paper

Abstract

The widely utilization of phenol and its derivatives such as 3-nitrophenol (3-NP) has led to the worldwide pollution in the environment. In this study, Ti/TiO2 photoelectrode was prepared with anodic oxidation of Ti foil electrode and then the photoelectrocatalytic (PEC) degradation of 3-NP was performed via this electrode, comparing with photocatalytic (PC), electrooxidation and direct photolysis by ultraviolet light. A significant photoelectrochemical synergetic effect in 3-NP degradation was observed on the Ti/TiO2 electrode and rate constant for the PEC process of Ti/TiO2 electrode was about three times as high as its PC degradation process. 3-NP concentration monitoring was carried out with differential pulse voltammetry. Results showed that PEC degradation has highest effect on concentration decreasing of 3-NP at solution and degraded it about 38 %, while other processes degradation efficiencies were about 4, 7, and 12 % for electrooxidation, direct photolysis and photocatalytic degradation, respectively. Finally, effects of solution pH and applied potential on degradation efficiency were studied and results showed that optimum pH for degradation is equal 4.00 and optimum potential is 1.2 V vs. Ag|AgCl|KCl (3M) reference electrode.

Keywords

Photocatalysis Photoelectrocatalysis Electrooxidation 3-nitrophenol Ti/TiO2 electrode 

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Reza Ojani
    • 1
  • Jahan-Bakhsh Raoof
    • 1
  • Akbar Khanmohammadi
    • 1
  • Ebrahim Zarei
    • 1
  1. 1.Electroanalytical Chemistry Research Laboratory, Faculty of ChemistryUniversity of MazandaranBabolsarIran

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