The
PCA of CeO2 and doped QDs were assessed through MB reduction
as depicted in Figure 2. First, 30 mL of MB solution with the suspension of 5 mg of synthesized
samples was prepared and placed in the dark for 30 min. The resulting
solution was exposed to a visible light source (Hg lamp) for 2 h,
and 4 mL of the solution was taken after every 30 min. A UV–vis
spectrophotometer determined the dye decolorization. The photocatalytic
efficiency of QDs was found using eq 1. C0 and Ct are related
to MB’s initial and final concentrations in the absence and
presence of light, respectively.