Preparation of Visible Light-responsive TiO_2 Thin Film Photocatalysts by an RF Magnetron Sputtering Deposition Method and Their Photocatalytic Reactivity

摘要

Visible light-responsive TiO_2(Vis-TiO_2)thin films were successfully developed by a radio-frequency(RF)magnetron sputtering deposition method.These Vis-TiO_2 thin films exhibited a declined composition of the O/Ti ratio from the surface(O/Ti=2.00)to bottom(O/Ti=1.93),enabling the absorption of visible light.Pt-loaded Vis-TiO_2 was,thus,found to decompose water involving methanol or a 0.05 M silver nitrate solution under visible light irradiation.