Visible-light-driven TiO 2 photocatalyst synthesis and photocatalytic properties

Abstract

Nano TiO₂ was synthesized by hydrothermal method. The sample was modified by doping transition metal ion (V, Cr and Fe) and non metal (N). Doped TiO₂ samples were characterized by XRD (X-ray diffraction), FE-SEM (Fieldemission scanning electron microscopy) and UV-Vis (UV-Vis diffuse reflectance spectroscopy). Photocatalytic activity in mineralization of xylene (vapor phase), methylene blue and active dyer PR (liquid phase) were tested. In comparison to non-doped TiO₂, V-,Cr-,Fe-doped TiO₂ and N-doped TiO₂ samples exhibited much higher photocatalytic activity using visible light instead of UV.