Synthesis, Characterization, and Photocatalytic Performance of Mesoporous α-Mn₂O₃ Microspheres Prepared via a Precipitation Route

Figure 9

Efficiency of the Mn₂O₃ microspheres for MB degradation (50 mL 2.5 mg/L MB solution, 0.05 g catalyst, constant air bubbling, and UV irradiation). (a) Without Mn₂O₃, (b) commercial MnO, (c) Mn₂O₃ microstructures, and (d) changes in the UV absorption spectra of MB solution with time.