Effect of Applied Potential on the Formation of Self-Organized TiO_𝟐 Nanotube Arrays and Its Photoelectrochemical Response

Figure 6

The corresponding photoconversion efficiencies of TiO₂ nanotubes with different anodization potentials, (a) 30 V, (b) 20 V, (c) 40 V, (d) 50 V, (e) 10 V, and (f) as-anodized sample.