Peroxidase-Like Activity of Ferrihydrite and Hematite Nanoparticles for the Degradation of Methylene Blue

Figure 4

The time-dependent absorbance spectra of the degraded MB solution using (a) 2LFh and (b) hematite NPs catalysts. Reaction conditions: pH 8, 5 g/L of NPs, 0.45 mol/L of H₂O₂, and 10 mg/L of MB.

(a)

(b)