Investigation on the Photoelectrocatalytic Activity of Well-Aligned TiO₂ Nanotube Arrays

Figure 3

Photocurrent-potential curves obtained for TiO₂ nanotube arrays electrode under dark conditions (curve I) and for 0.1 mol L⁻¹ Na₂SO₄ (curve II) and 0.1 mol L⁻¹ NaCl (curve III) under illumination ( complete solar spectrum). The inset shows the corresponding visible light response of the electrode (𝜆>400 nm). Scan rate = 10 mV s⁻¹, pH=6.0.