Adsorption-Oxidation Mechanism of δ-MnO₂ to Remove Methylene Blue

Figure 1

The XRD pattern (a) of δ-MnO₂; the N₂ adsorption/desorption isothermal plot of δ-MnO₂ (b) and the microspore size distribution plot (c) by the SF method; HRTEM (d, e) and HRSEM (f, g) images of δ-MnO₂.