Fig. 5. UV–vis absorption spectra of colloidal solutions of TiO2 modified with tiron (a), ascorbic acid (b) and rutin (c) (solid lines), as well as films on glass substrates (d).
Spectra of modifiers (dotted lines) and unmodified TiO2 (dashed lines) are shown for comparison. Concentration of TiO2: 0.1 g dm3
. Photos of colloids are presented in insets.