Characterization and Photocatalytic Activity of TiO₂ Nanotube Films Prepared by Anodization

Figure 8

Top view of SEM images of TNT synthesized at different electrolyte solution pH: (a) 2, (b) 4, (c) 6, (d) 8, and (e) 10.

(a)

(b)

(c)

(d)

(e)