The FT-IR spectrum of TiO2-SiO2 is shown in the Fig. 9. It consists of several bands at 1740, 1630, 1060-1220, 950, 798 and 650-740 cm-1.The peaks in the spectra have been assigned according to the literature [18]. The band at 1630 and 3300 cm-1 are assigned to OH bending and stretching vibrations respectively. It can be ascribed to the stretching of silanol groups interacting through hydrogen bonds with water molecules. The vibration in the range 1060-1220 cm-1 is assignable to Si-O-Si vibration mode of isolated Si-OH