期刊
JOURNAL OF CRYSTAL GROWTH
卷 312, 期 3, 页码 426-430出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2009.11.027
关键词
Nanostructures; Hydrothermal crystal growth; Nanomaterials; Oxide
资金
- Natural Science Foundation of China [20876089]
- Key Technologies R&D Programme of China [2007BAD87B05]
In this work, we report a simple one-pot hydrothermal approach to prepare CeO2 hollow microspheres with a mean diameter of 1.5 mu m and a shell thickness of 90 nm. Structure and morphology of CeO2 hollow spheres were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), field-emission scanning electron microscope (FE-SEM), and N-2 adsorption-desorption. In the reaction system, L-asparagine and KBrO3 act as OH- provider and oxidizer, respectively. Reaction duration and L-asparagine content are shown to play important roles in the formation of the hollow structures. A hollowing mechanism is proposed based on the experimental results. (C) 2009 Elsevier B.V. All rights reserved.
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