Performance of Gd-doped Ti-based Sb-SnO2 anodes for electrochemical destruction of phenol

Yujie Feng, Yuhong Cui, Bruce Ernest Logan, Zhengqian Liu

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

The performance of electrodes for the electro-catalytic decomposition of a model pollutant (phenol) was enhanced using Gd-doped Ti/SnO2-Sb electrodes prepared by a thermal deposition method. Phenol degradation followed first-order rate kinetics, with the maximum rate achieved using a 2% Gd doping level (molar ratio based on Gd:Sn) for tests conducted over a doping range of 1-10%. The first-order rate constant with 2% Gd was 0.044 min-1, versus 0.026 min-1 obtained with the control (plain Ti/SnO2-Sb). TOC removal and UV scans revealed that different intermediates were produced for different Gd contents, and that destruction efficiencies of these intermediates also varied with Gd doping levels of 1-5%. Electrodes were characterized by scanning electron microscopy, X-ray diffraction, electron dispersive spectrometry, and X-ray photon-electron spectroscopy. It is suggested that the state of specific active sites on the electrode surface and the oxygen transfer activity at the electrode/electrolyte interface affect the performance of anodes with different compositions.

Original languageEnglish (US)
Pages (from-to)1629-1636
Number of pages8
JournalChemosphere
Volume70
Issue number9
DOIs
StatePublished - Feb 1 2008

Fingerprint

Phenol
Phenols
phenol
Anodes
Electrodes
electrode
Doping (additives)
Spectrum Analysis
electron
Electrons
Electron spectroscopy
electrolyte
Spectrometry
Electrolytes
spectrometry
Rate constants
Photons
X-Ray Diffraction
Electron Scanning Microscopy
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Feng, Yujie ; Cui, Yuhong ; Logan, Bruce Ernest ; Liu, Zhengqian. / Performance of Gd-doped Ti-based Sb-SnO2 anodes for electrochemical destruction of phenol. In: Chemosphere. 2008 ; Vol. 70, No. 9. pp. 1629-1636.
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abstract = "The performance of electrodes for the electro-catalytic decomposition of a model pollutant (phenol) was enhanced using Gd-doped Ti/SnO2-Sb electrodes prepared by a thermal deposition method. Phenol degradation followed first-order rate kinetics, with the maximum rate achieved using a 2{\%} Gd doping level (molar ratio based on Gd:Sn) for tests conducted over a doping range of 1-10{\%}. The first-order rate constant with 2{\%} Gd was 0.044 min-1, versus 0.026 min-1 obtained with the control (plain Ti/SnO2-Sb). TOC removal and UV scans revealed that different intermediates were produced for different Gd contents, and that destruction efficiencies of these intermediates also varied with Gd doping levels of 1-5{\%}. Electrodes were characterized by scanning electron microscopy, X-ray diffraction, electron dispersive spectrometry, and X-ray photon-electron spectroscopy. It is suggested that the state of specific active sites on the electrode surface and the oxygen transfer activity at the electrode/electrolyte interface affect the performance of anodes with different compositions.",
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Performance of Gd-doped Ti-based Sb-SnO2 anodes for electrochemical destruction of phenol. / Feng, Yujie; Cui, Yuhong; Logan, Bruce Ernest; Liu, Zhengqian.

In: Chemosphere, Vol. 70, No. 9, 01.02.2008, p. 1629-1636.

Research output: Contribution to journalArticle

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