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

Figure 13

Schematic view of the principle of the determination of ^∗𝐸_Fn. Upon increasing the pH of the solution, the band edges of a semiconductor shift to more negative potentials. At pH = pH₀, the value of ^∗𝐸_Fn matches the reduction potential of a pH-independent redox species in the electrolyte (MV²⁺).

(a)

(b)