Optics and Photonics Society of Iran

In this paper photocatalytic activity of Titanium dioxide nanoparticles was investigated under UV irradiation. Titanium dioxide nanoparticles are prepared by hydrothermal and sol-gel routs with Tetra Butil Titanate as Ti source. The prepared TiO2 nanoparticles were characterized by X ray diffraction analysis (XRD) and the particle size were calculated by Debbie–Shearer method. The photocatalytic activity of the prepared samples was evaluated by using Methyl Orange degradation decolorization under UV irradiation. The results of this study show the photocatalyst activity of prepared nanoparticles in anatase phase are more effective. In addition, effect of annealing treatment on crystal phase, particle size and photocatalytic performance were investigated and reported.