Photocatalytic Properties of Nanotubular-Shaped TiO_𝟐 Powders with Anatase Phase Obtained from Titanate Nanotube Powder through Various Thermal Treatments

Figure 2

Scanning electron microscope images for the calcined powders at (a) 400°C, (b) 425°C, (c) 450°C, (d) 475°C, and (e) 500°C in O₂ atmosphere for 30 min.

(a)

(b)

(c)

(d)

(e)