Template-Free Synthesis and Self-Assembly of CeO2 Nanospheres Fabricated with Foursquare Nanoflakes
journal contributionposted on 31.12.2009 by Rongrong Cui, Wencong Lu, Liangmiao Zhang, Baohua Yue, Shanshan Shen
Any type of content formally published in an academic journal, usually following a peer-review process.
Large-scale CeO2 spherical architectures composed of numerous nanoflakes have been controllably prepared through a simple hydrothermal reaction without any template. The products were characterized with X-ray diffraction, nitrogen adsorption−desorption experiments, transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). It was found that the CeO2 architecture ca. 100−230 nm in diameter was made up of many nanoflakes with a BET surface of 24 m2/g. The possible mechanism for the nanostructures formation was discussed. The catalytic performance of CeO2 nanospheres and the direct-depositing CeO2 nanoparticles in CO oxidation were also tested, and the catalytic results were compared and explained by analyzing the exposed planes of the two.