Influence of Temperature and Doping Content on the Photocatalytic Activity in Visible Light of W-Doped TiO2

XRD reveals that the doping delays the transition Anatase to Rutile to high temperature. XRD pattern of 5%W-TiO2 treated at 900 °C exhibits the appearance of new phase (H). Photocatalytic study shows an important activity in visible light of doped samples thermally treated at 700 and 900 °C. Appearing new phase enhances the photocatalytic reactivity of Rutile in visible light. The percentage of doping affects the photocatalytic activity.