Simple Fabrication and Electrochemical Properties of Co3O4 Hollow Spheres

Co3O4 hollow spheres were hydrothermally prepared at 180 degrees C by the one-pot method, followed by heating to 550 degrees C in air. The characteristics of these Co3O4 samples were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. The results show that the as-synthesized Co3O4 hollow spheres have the porous wall which consists of nanosized particles. The cyclic voltammetry (CV) measurement shows that as-prepared Co3O4 hollow sphere exhibited a good pseudo-capacitance behavior. Moreover, this paper also proposes the possible formation mechanism of Co3O4 hollow spheres synthesized under the one-pot method.