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Kinetics of TiO2-catalyzed ultrasonic degradation of rhodamine dyes

Priya, MH and Madras, Giridhar (2006) Kinetics of TiO2-catalyzed ultrasonic degradation of rhodamine dyes. In: Industrial & Engineering Chemistry Research, 45 (3). pp. 913-921.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ie050966p

Abstract

The ultrasonic degradation of two dyes, Rhodamine B (C28H31ClN2O3) and Rhodamine Blue (C28H32N2O3), were studied in the absence of catalyst and in the presence of two catalysts (combustion-synthesized anatase TiO2 and commercial Degussa P-25 TiO2. The rate of degradation of catalyzed reaction was higher than that obtained with in the absence of the catalysts. Among the catalysts, combustion-synthesized anatase TiO2 degraded the dyes faster when compared to the degradation with commercial Degussa P-25 catalyst. A Langmuir-Hinshelwood kinetic model was developed and the kinetic rate parameters were determined. The effect of other operating parameters, such as initial concentration, pH, temperature, and power intensity, was also investigated. The degradation rate increased with decreasing pH, increasing temperature, and higher intensity.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 29 Oct 2010 07:35
Last Modified: 29 Oct 2010 07:35
URI: http://eprints.iisc.ernet.in/id/eprint/32836

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