Photocatalytic Activity of TiO₂-WO₃ Composites

Figure 3

OH radicals formation on the photocatalyst surface by the fluorescence measurements of 7-hydroxycoumarine for (a) TiO₂and (b) TiO₂-WO₃-3%; (1) as received, (2) 400^∘C-treated, and (3) 600^∘C-treated.

(a)

(b)