Ta/Ti-and Nb/Ti-Mixed Oxides as Efficient Solar Photocatalysts: Preparation, Characterization, and Photocatalytic Activity
Figure 3
(a) XPS profiles of Ti2p spectra for the untreated TiO2 (Degussa P25) and treated TiO2 photocatalyst after calcination at 500°C for 3 hours in air. (b) Typical Nb 3d spectrum for Nb/TiO2 mixed oxides. (c) Typical Ta 4f spectrum for Ta/TiO2 mixed oxides.