TiO₂ Nanotubes with Different Ag Loading to Enhance Visible-Light Photocatalytic Activity

Figure 4

Absorption spectra of MB under (a) UV irradiation and (b) sunlight in the presence of different catalysts. And photocatalytic degradation of MB under (c) UV irradiation and (d) sunlight using various photocatalysts.

(a)

(b)

(c)

(d)