A simple hydrothermal method has been employed to fabricate monodisperse CeO 2 hollow spheres assembled by nano-octahedra. Results revealed that the as-obtained CeO 2 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 CeO 2 hollow spheres exhibited a higher catalytic properties compared to the commercial CeO 2 powders.
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Yang et al. (2009) studied this question.
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