Table of Contents
Journal of Catalysts
Volume 2013, Article ID 104019, 6 pages
Research Article

Mineralization of Azo Dye Using Combined Photo-Fenton and Photocatalytic Processes under Visible Light

1School of Energy, Environment, and Natural Resources, Madurai Kamaraj University, Madurai, Tamil Nadu 625 021, India
2Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu 625 021, India

Received 31 December 2012; Accepted 18 March 2013

Academic Editor: Hicham Idriss

Copyright © 2013 Selma K. Kuriechen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Visible-light-assisted photodegradation of an azo dye, Reactive Red 180 (RR180), in the presence of nitrogen-doped TiO2 (N-TiO2) has been studied. The photodegradation of RR180 is evaluated through decolorization studies and total organic carbon analysis. The efficacy of hydrogen peroxide (H2O2), potassium peroxomonosulfate (oxone or PMS), and potassium peroxodisulfate (PDS) in improving the photodegradation of the dye in the N-TiO2-RR180 system is also examined. The effect of combining photo-Fenton-like reaction with N-TiO2-mediated photodegradation of RR180 under visible light has been investigated. The photoactivity of N-TiO2-RR180-Fe3+/Cu2+-oxidant systems is compared with the individual techniques of photocatalysis and photo-Fenton-like reactions. The coupled system possesses superior photomineralization ability towards the abatement of RR180.