Highly selective photocatalytic and sensing properties of 2D-ordered dome films of nano titania and nano Ag2+ doped titania†
Abstract
Novel 2D-ordered dome films of nano titania (2D-TiO2) and nano Ag2+ doped titania (2D-Ag-TiO2) were prepared by RF magnetron sputtering method. The existence of oxygen vacancies or Ti3+ ions in the 2D-ordered dome films extends the absorption of TiO2 from UV region to visible region up to 530 nm. Doping of Ag2+ in the 2D-TiO2 film considerably enhance the visible light absorption of the 2D-Ag-TiO2 film. Remarkably, for the photodegradation of cationic