Asian Journal of Research in Chemistry
Year : 2015, Volume : 8, Issue : 5
First page : ( 327) Last page : ( 334)
Print ISSN : 0974-4169. Online ISSN : 0974-4150.
Article DOI : 10.5958/0974-4150.2015.00054.1

Synthesis, Characterization and Visible Light Induced Photocatalytic Activity of Metal Doped TiO₂

Saritha T.J., Bella G.R.*

Department of Chemistry, Nesamony Memorial Christian College, Marthandam

*Corresponding Author E-mail: grbella321@gmail.com

Online published on 25 June, 2015.

Abstract

The photo catalytic decolourization of Methyl orange (MO) widely used as a textile dye, can be photocatalysed by TiO₂ based photo catalysts using Advanced Oxidation Process (AOPs). Doped TiO₂ photo catalysts were synthesized by liquid impregnation method and sol-gel method and characterized by UV-Visible spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). TiO₂ appears to be a suitable catalyst for water treatment. In this study the experiments were carried out by irradiating the aqueous solution of dyes containing photo catalyst under solar light. The rate of decolourizaion was estimated from residual concentrations using photocolourimeter. Photodecolourization efficiency was zero when the photo catalysis was carried out in the absence of sunlight and it was small in presence of sunlight without catalyst. It was found that about 86% decolourization occurs with photo catalyst in the presence of sunlight within 6hr. After 8hr sunlight irradiation, complete decolourization was observed for metal doped photo catalysts. The effect of parameters such as amount of photo catalyst, irradiation time and dye concentration were also examined.

Top

Keywords

Advanced oxidation process, photo catalysis, liquid impregnation method, methyl orange dye, photo catalytic decolourization.

Top