Monodisperse CeO2 sub-micro spherical aggregates with controllable building blocks
✍ Scribed by Jingjing Wei; Zhijie Yang; Yanzhao Yang; Huiying Wei
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 194 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0232-1300
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Monodisperse CeO~2~ spherical aggregates with diameters ranging from 200 to 300 nm have been successfully synthesized through a facile hydrothermal method. The structure and morphology of the samples were characterized by powder X‐ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and field‐emission scanning electron microscopy (FE‐SEM). The building blocks (primary nanocrystals) of the spherical aggregates could be effectively tuned by adding different amount of urea. Furthermore, N~2~ adsorption/desorption experiment displays a gradual increase of BET surface areas of spherical aggregates with increasing the amount of urea. Finally, the formation mechanism of CeO~2~ spherical aggregates was preliminarily discussed. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)