Template-free Hydrothermal Synthesis of High Surface Area Nitrogen-doped Titania Photocatalyst Active under Visible Light

摘要

The nanofibrous ammonium titanate (NH_4Ti_3O_(7-x)N_x was hydrothermally synthesized by a new method proposed here from titanium oxysulfate precursor in a NH_4OH solution under hydrothermal conditions at 393 K without any extra templates.The calcination of the as-synthesized material at 673 K produced nitrogen-doped titania (TiO_(2-X)N_X) with anatase phase,which absorbed visible light and had an extremely high surface area (377m~2g~(-1)).This material showed an excellent photocatalytic activity in decomposition of 2-propanol under visible light irradiation.