S. Pitchaimuthu, G. Lakshmi, P. Velusamy
Dec 12, 2014
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Influential Citations
5
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Journal
Journal of Advanced Chemical Sciences
Abstract
The photocatalytic activity of TiO 2 is enhanced by the addition of β-cyclodextrin (β-CD) on decoloration of azocarmine G (AZG) dye under solar light irradiation. The morphologies, phase structures and optical properties of TiO 2 and TiO 2 -β-CD catalysts has been investigated by FE-SEM, PXRD and UV–visible DRS respectively. The interaction between AZG dye and β-CD has also been characterized by UV-visible and FT-IR spectral analyses. The TiO 2 –β-CD system exists higher photocatalytic activity than pure TiO 2 system. This is attributed to their large surface area, absorption enhancement in solar light region and effective separation of electrons and holes. The percentage removal (~98%) was achieved at acidic pH within 120 minutes. The observed results indicate that decolorization of the AZG dye follows pseudofirst-order kinetics.