Rapid Formation of 1D Titanate Nanotubes Using Alkaline Hydrothermal Treatment and Its Photocatalytic Performance

Figure 3

FESEM images of (A) starting material, TiO₂ nanopowders, and formation of nanotubes with different reaction duration: (B) 3 h, (C) 9 h, and (D) 24 h; (b) TEM image of the as-prepared TNT.

(a)

(b)