TITLE

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

AUTHOR(S)
Bianco Prevot, A.; Basso, A.; Baiocchi, C.; Pazzi, M.; Marcí, G.; Augugliaro, V.; Palmisano, L.; Pramauro, E.
PUB. DATE
January 2004
SOURCE
Analytical & Bioanalytical Chemistry;Jan2004, Vol. 378 Issue 1, p214
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
15125746

 

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