Fig. 3. FTIR-ATR of (a) Cu(NO3)2/TiO2 and (b) Cu(ac)2/TiO2 samples. Main nitrate and acetate peaks, showing the new binding modes and band shift for the non-calcined (RT) and calcined at 400 °C composites vs. the pure precursors and TiO2. Samples contained 5 at% of Cu, to obtain a better visualization. The full range of the pure precursor, 5 at% Cu and 1 at% Cu samples are shown in Fig. S8 and S9.†.
