Preparation of Mn2O3 catalyst with core-shell structure via spray pyrolysis assisted with glucose

A novel core-shell Mn2O3 catalyst is obtained by facile spray pyrolysis assisted with glucose acting as a structure-directing agent. The detail characterizations include X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption/desorption isotherms, and the thermogravimetric method (TG/DTA). In the probe test of the aqueous degradation of methylene blue (MB), the high catalytic peroxidization activity of core-shell Mn2O3 catalyst, compared to the commercial Mn2O3, is attributed to the high crystallization of alpha-Mn2O3, the large surface area that resulted from the core-shell structure with porous architecture, and the special core-shell structure that acted as a micro-reactor.