The photocatalytic performances of all the obtained samples were
measured toward degradation of RhB under Xe light (350 W) irradiation
at room temperature, and the degradation of Rhodamine B (RhB) was
observed based on the absorption spectroscopic technique. Typically,
30 mg of the photocatalysts were added to the Rhodamine B solution
(10 mg/L) with 0.7 mL H 2 O 2 (≥30 wt%). The reaction mixture was
stirred in the dark for 40 min to achieve the adsorption-desorption
equilibrium between RhB and the photocatalyst, then the solution
was exposed to the Xe light irradiation under ambient conditions with
the constant stirring. After given time intervals, the mixture solution
was centrifuged and analyzed by measuring the absorbance of RhB at
550 nm. [ 53 ]