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Applied studies on immobilized titanium dioxide films ascatalysts for the photoelectrochemical detoxification of water

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Abstract

Preliminary results are presented on the photochemical and photoelectrochemical degradation of aqueous organic solutions by anodic, thermal and sol–gel TiO2 films. The films were tested in a photochemical falling film reactor, and a photochemical/photoelectrochemical vortex reactor, and preliminary results are presented on the degradation of a range of model organics using these reactors. The former showed the best mass transport characteristics and most efficient light usage, whilst the latter reactor clearly showed the efficacy of the electric field enhancement effect. The results on the vortex reactor effectively represent a proof-of-concept of the electric field enhancement approach in large scale photoelectrochemical reactors. From time to time it is necessary to recoat the substrates, and the importance of the procedure adopted to remove ’old‘ TiO2 films prior to the fabrication of ‘new’ films is highlighted, as well as the mode of operation of the sol–gel films, and problems encountered in reactor design.

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Authors and Affiliations

  1. The Chemistry Department, The University, Newcastle upon Tyne, Bedson Building, NE1 7RU, Great Britan

    I. M. Butterfield , P. A. Christensen , A. Hamnett , K. E. Shaw , G. M. Walker  & S. A. Walker

  2. The Department of Chemical and Process Engineering, Merz Court, The University, Newcastle upon, Tyne, NEI7RU, Great Britan

    C. R. Howarth

Authors
  1. I. M. Butterfield
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  2. P. A. Christensen
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  3. A. Hamnett
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  4. K. E. Shaw
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  5. G. M. Walker
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  6. S. A. Walker
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Butterfield , I.M., Christensen , P.A., Hamnett , A. et al. Applied studies on immobilized titanium dioxide films ascatalysts for the photoelectrochemical detoxification of water. Journal of Applied Electrochemistry 27, 385–395 (1997). https://doi.org/10.1023/A:1018453402332

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