Modification of the photocatalytic activity of TiO(2) by β-Cyclodextrin in decoloration of ethyl violet dye

The photocatalytic decoloration of an organic dye, ethyl violet (EV), has been studied in the presence of TiO(2) and the addition of β-Cyclodextrin (β-CD) with TiO(2) (TiO(2)-β-CD) under UV-A light irradiation. The different operating parameters like initial concentration of dye, illumination time, pH and amount of catalyst used have also been investigated. The photocatalytic decoloration efficiency is more in the TiO(2)-β-CD/UV-A light system than TiO(2)/UV-A light system. The mineralization of EV has been confirmed by Chemical Oxygen Demand (COD) measurements. The complexation patterns have been confirmed with UV–Visible and FT-IR spectral data and the interaction between TiO(2) and β-CD have been characterized by powder XRD analysis and UV–Visible diffuse reflectance spectroscopy.