(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂-Based Nanomaterials

Figure 10

Schematic view of the principle of spectroelectrochemical determination of the quasi-Fermi level of nanocrystalline TiO₂ (a, b); for details, see the text. (c) Absorbance changes of a transparent TiO₂ film at two different wavelengths recorded during a cathodic potential sweep in a deaerated LiClO₄ (0.1 M) solution acidified to pH 2.9.

(a)

(b)

(c)