Analytical and Bioanalytical Chemistry

, Volume 378, Issue 1, pp 214–220 | Cite as

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

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 degradation Decolourisation Azo dyes Methyl Orange Analysis 

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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

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