Photocatalytic Activity of TiO₂-WO₃ Composites

Figure 1

Diffuse reflectance spectra of TiO₂ and WO₃-TiO₂ photocatalysts, (a) as received, (b) calcined at 400^∘C, and (c) calcined at 600^∘C.

(a)

(b)

(c)