Inderscience Publishers

Kinetics of the TiO2-catalysed photodegradation of reactofix navy blue 2GFN dye

0
UV-irradiated TiO2-catalysed as well as uncatalysed photodegradation of the dye, reactofix navy blue 2GFN, has been studied under various reaction conditions. The kinetics have been followed at 603 nm, the λmax of the dye, in the visible region. The rate of the reaction depends on [dye] and [O2], and on [TiO2] when its concentration is below 0.2 g L-1. On increasing [TiO2] beyond 0.2 g L-1, the rate attains a limiting value. On increasing pH, the rate decreases slightly. At 7.0 pH and 0.2 g L-1 TiO2, the photodegradation kinetics is in conformity with the following experimental rate law.
Robs=k2[dye]+k3[dye][O2] +
k8K1K2[dye][O2]
—————————————
(1+K2[dye])(1+K1[O2])
here k2 and k3 are related to uncatalysed and k8 to TiO2 catalysed pathways. The complete decolourisation of the dye is achieved in about 20 minutes.

Keywords: photodegradation, photocatalysis, TiO2, decolourisation, textile dyes, kinetics, titanium dioxide, wastewater treatment, reactofix navy blue 2GFN dye

Customer comments

No comments were found for Kinetics of the TiO2-catalysed photodegradation of reactofix navy blue 2GFN dye. Be the first to comment!