Research Article
Effects of KBr and KI on Photocatalytic Degradation of Dye W-7G with Nano-TiO2 as Catalyst
Figure 4
Adsorption models of W-7G in TiO2 solution and schematic diagram of the photocatalysis mechanism involving anion radicals: (a) at acidic conditions (pH < pi); (b) at alkaline conditions (pH > pi); (c) radical reaction with dye molecules adsorbed on the surface; (d) radical reaction with halogen ions adsorbed on the surface.
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