Figure 9

(a) Conversion of 4-NP in 4 successive cycles of reduction using TiO₂/Ag/SnO₂(2 wt%) as photocatalyst, (b) XRD pattern of the TiO₂/Ag/SnO₂(2 wt%) catalyst after reaction, (c) Effects of a series of scavengers on the degradation efficiency of MB by TiO₂/Ag/SnO₂(2 wt%) photocatalyst.