Synthesis and Characterization of Structure-Controlled Micro-/Nanocomposite TiO₂ Fibers with Enhanced Photocatalytic Activity

Figure 6

SEM images of fibers obtained from samples (a) F0, (b) F2, (c) F4, and (d) F6 after calcination at 500°C for 5 hours in air.

(a)

(b)

(c)

(d)