Table of Contents
International Journal of Photochemistry
Volume 2014, Article ID 232475, 6 pages
Research Article

Silver(I) Catalyzed Photochemical Oxidation of Methylene Blue and Safranine-O by Peroxydisulphate: A Green Chemical Approach

1Photochemistry and Solar Energy Laboratory, Department of Chemistry, College of Science, Mohanlal Sukhadia University, Udaipur 313002, India
2Pacific Institute of Technology, Pacific Hills, Airport Road, Udaipur 313003, India
3Pacific College of Basic & Applied Sciences, PAHER University, Udaipur 313003, India

Received 18 June 2014; Accepted 19 September 2014; Published 30 September 2014

Academic Editor: Mounir Maafi

Copyright © 2014 Ravisha Chhajed 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.


In the present investigation, a comparative study of silver(I) catalysed photochemical oxidation of methylene blue (MB) and safranine-O (SO) by peroxydisulphate has been reported. The effect of different parameters, such as pH, concentration of peroxydisulphate, silver nitrate, and light intensity, on the reaction rate has been observed. The progress of the photochemical oxidation was monitored spectrophotometrically. The optimum conditions for photochemical oxidation were achieved. The dyes were completely oxidized and degraded into CO2 and H2O. A tentative mechanism for silver(I) catalyzed photochemical oxidation of these dyes by peroxydisulphate has also been proposed.