Degradation of Methylene Blue Using Hydrothermally Synthesized α-Manganese Oxide Nanostructures as a Heterogeneous Fenton Catalyst

Figure 5

Time profile of methylene blue degradation by MnNSs (a) H1, (b) H2, (c) H3, and (d) H4, red and blue in the presence and absence of H₂O₂, respectively (H1, H2, H3, and H4 are 3, 6, 12, and 24 hours, respectively).

(a)

(b)

(c)

(d)