Synthesis, Size Characterisation and Photo Catalytic Studies on Titania Doped and Undoped Zinc Oxide Nanoparticles for Eosin Yellow Degradation

Ramapriya. L and J. Santhanalakshmi*
Department of Physical Chemistry, University of Madras, Guindy Campus, Chennai–600025, Tamilnadu, India

A B S T R A C T
Zinc oxide nanoparticles and Titania doped Zinc oxide nanoparticles are synthesized and size characterized using UV-DRS, PXRD, FESEM and EDAX methods. One pot batch type reactor fitted with top view vertical irradiation source was used for dye degradation studies. The irradiation sources used are UV, UV Blue and Solar. The catalyst loading was maintained as 1mg/20mL of 1mM Eosin yellow dye aqueous solution. The same was studied by incorporating H₂O₂. The progress of dye degradation is studied by measuring absorbance versus time intervals at constant wavelength maxima of the dye. Pseudo first order conditions are maintained. Based on the absorbance versus time measurements, the rate coefficient values are determined. The photo catalytic activity of the catalysts in the degrading process of the dye is found more efficient in solar irradiations. The salient features and results are put forth and discussed.
Keywords: ZnO nanoparticles, Titania doped ZnO nanoparticles, dye degradation