Black Titanium Dioxide Nanomaterials in Photocatalysis

Figure 11

Ratio of the actual and initial concentrations (C/C₀) of rhodamine B as a function of the UV illumination time for the as-anodized sample (anodized at 80 V for 7200 s), sample A0 (anodized at 80 V for 7200 s, following by annealing at 450°C for 4 h), and sample A2 (black TiO₂ nanotubes converted from sample A0 via the activation step and subsequent cathodic treatment). The blank experiment was carried out in the absence of any photocatalyst (“no photocatalyst”). Reprinted with permission from [91]. Copyright (2014) The Royal Society of Chemistry.