Fig. 5

CZE electropherogram of CIT (25 µg mL⁻¹) photocatalytic degradation upon exposure to 48 W LED lamp for 2 h at (A) pH 7 in the presence of 0.5 mg mL⁻¹ Mg/ZnO. B pH 9 in the presence of 0.5 mg mL⁻¹ Cu/ZnO. C pH 7 in the presence of 0.5 mg mL⁻¹ Sn/ZnO