Characterization and Photocatalytic Activity of TiO₂ Nanotube Films Prepared by Anodization

Figure 2

Top view of SEM images of TNT synthesized at different anodization voltages: (a) 10 V, (b) 20 V, (c) 30 V, (d) 40 V, (e) 50 V, (f) 60 V, and (g) 70 V.

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