Photocatalytic Activity Enhancement of Anatase TiO₂ by Using TiO

Figure 3

Typical SEM images of (a) TiO₂, (b) TT1, (c) TT20, and (d) PTiO, clearly showing that the partice size of the as-prepared samples is very close and around 23 nm.

(a)

(b)

(c)

(d)