Figure 8

Photocatalytic activities (i) and kinetics (ii) of the different catalysts. (a) No catalyst, (b) TiO₂, (c) TiO₂/SnO₂, (d) TiO₂/Ag, (e) TiO₂/Ag/SnO₂(1 wt%), (f) TiO₂/Ag/SnO₂(2 wt%), and (g) TiO₂/Ag/SnO₂(5 wt%) for degradation of MB under visible light irradiation.