Monodisperse CeO2 sub-micro spherical aggregates with controllable building blocks

被引：4
|
作者：
Wei, Jingjing [1 ]
Yang, Zhijie [1 ]
Yang, Yanzhao [1 ]
Wei, Huiying [1 ]
机构：
[1] Shandong Univ, Key Lab Special Funct Aggregate Mat, Educ Minist, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2011年 / 46卷 / 02期
关键词：
crystal growth; nanomaterials; CeO2; spherical aggregates; NANOCRYSTALS; FABRICATION;
D O I：
10.1002/crat.201000479
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Monodisperse CeO2 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 CeO2 spherical aggregates was preliminarily discussed. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：201 / 204
页数：4
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