The Photocatalytic Reduction of Hexavalent Chromium by Controllable Mesoporous Anatase TiO₂ Nanoparticles

Figure 11

The absorbance spectrum of K₂Cr₂O₇ aqueous solution with various TiO₂ as photocatalysts as a function of illumination time: (a) 0% AC, (b) 5% AC, and (c) 10% AC. The solar simulator with xenon 150 W lamp with and without a filter was used as a light source.

(a)

(b)

(c)