Analytical and Bioanalytical Chemistry

, Volume 378, Issue 1, pp 214–220

Analytical control of photocatalytic treatments: degradation of a sulfonated azo dye

  • A. Bianco Prevot
  • A. Basso
  • C. Baiocchi
  • M. Pazzi
  • G. Marcí
  • V. Augugliaro
  • L. Palmisano
  • E. Pramauro
Original Paper

DOI: 10.1007/s00216-003-2286-2

Cite this article as:
Bianco Prevot, A., Basso, A., Baiocchi, C. et al. Anal Bioanal Chem (2004) 378: 214. doi:10.1007/s00216-003-2286-2
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Abstract

The degradation of Methyl Orange (C14H14N3SO3Na), chosen as a model sulfonated azo dye, was investigated in aqueous solutions containing suspended polycrystalline TiO2 particles under irradiation with simulated sunlight. The dye disappearance and the formation of the mineralization end products were monitored; the formation of the main transient intermediates was also examined in detail. Particular attention was devoted to the identification and to the evolution of fragments retaining the chromophoric group. The comparison of data coming from various analytical techniques led to a possible reaction mechanism for the degradation process, giving insight into an aspect of the treatment which has not been considered in previous studies.

Keywords

Photocatalytic degradationDecolourisationAzo dyesMethyl OrangeAnalysis

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • A. Bianco Prevot
    • 1
  • A. Basso
    • 1
  • C. Baiocchi
    • 1
  • M. Pazzi
    • 1
  • G. Marcí
    • 2
  • V. Augugliaro
    • 2
  • L. Palmisano
    • 2
  • E. Pramauro
    • 1
  1. 1.Dipartimento di Chimica AnaliticaUniversità di TorinoTorinoItaly
  2. 2.Dipartimento di Ingegneria Chimica dei Processi e dei MaterialiUniversità degli Studi di PalermoPalermoItaly