Preparation and characterization of ceria nanospheres by microwave-hydrothermal method

被引：211
|
作者：
Dos Santos, M. L. [1 ]
Lima, R. C. [1 ]
Riccardi, C. S. [1 ]
Tranquilin, R. L. [1 ]
Bueno, P. R. [1 ]
Varela, J. A. [1 ]
Longo, E. [1 ]
机构：
[1] Univ Estadual Paulista, LIEC, Inst Chem, BR-14800900 Araraquara, SP, Brazil
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 30期
基金：
巴西圣保罗研究基金会;
关键词：
Ceramics; Nanomaterials; Characterization methods; Ceria; Microwave-hydrothermal method;
D O I：
10.1016/j.matlet.2008.08.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crystalline ceria (CeO2) nanoparticles have been successfully synthesized by a simple and fast microwave-hydrothermal method at 130 degrees C for 20 min. As-synthesized CeO2 powders were calcinated at 500 degrees C for 1, 2 and 4 h. The products were characterized by thermogravimetric analysis (TG-DTA), X-ray powder diffraction (XRD), field-emission scanning electron microscopy/STEM mode (FEG/STEM), Fourier Transformed-IR and RAMAN spectroscopies. It is shown that synthesized ceria powders have a spherical shape with particle size below 10 nm, a narrow distribution and exhibit weak agglomeration. The FTIR spectrum of the ceria exhibits strong broad band below 700 cm(-1) which is due to the delta (Ce-O-C) mode. Raman spectrum is characterized by the presence of a very strong band to 464.5 cm(-1). The microwave-hydrothermal method enabled cerium compounds to be synthesized at low temperature and shorter time. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：4509 / 4511
页数：3
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