Fabrication of Monodisperse CeO₂ Hollow Spheres Assembled by Nano-octahedra

Abstract

A simple hydrothermal method has been employed to fabricate monodisperse CeO2 hollow spheres assembled by nano-octahedra. Results revealed that the as-obtained CeO2 hollow spheres were assembled by nano-octahedra with an average edge length of ca. 20 nm. A possible crystal growth and hollowing mechanism was suggested based on the detailed experiment. The CO oxidation properties were investigated, and the novel structured CeO2 hollow spheres exhibited a higher catalytic properties compared to the commercial CeO2 powders.