Abstract

In this paper, we report the successful synthesis of mesoporous MnO₂ nanospheres composed of nanosheets via a facile hydrothermal route without any template. The phase and morphology of the products were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The reaction time played an important role in the formation of mesoporous MnO₂ nanospheres. The obtained nanospheres showed superior catalytic ability in the degradation reaction of an aqueous solution of Rhodamine B (RhB) in the presence of H₂O₂. Electrochemical measurements predicted that the mesoporous MnO₂ nanosphere-modified electrode showed good electrocatalytic properties for the reduction of H₂O₂ in alkaline medium, which might have wide application in electrochemical analysis.