Fig. 2From: Simulated solar light-driven photocatalytic degradation of trichloroethylene in water using BiOBr promoted by sulfite additionComparison of photocatalytic activity of TiO2 (P25) and BiOBr to degrade TCE with addition of SIV under simulated solar light (a) and SEM image of pure BiOBr (b). Conditions: [TCE]0 = ~ 0.25 mM, [SO32−]0 = 25 mM, BiOBr or TiO2 = 1 g/L, and the solution pH was not bufferedBack to article page