Hydrothermal Synthesis of CeO2 Nanocrystals Using Oleate-Modified Precipitation Method

被引:4
作者
Kobayashi, Katsutoshi [1 ]
Haneda, Masaaki [1 ]
Ozawa, Masakuni [1 ]
机构
[1] Nagoya Inst Technol, Ceram Res Lab, Gifu 5070071, Japan
来源
ADVANCED MATERIALS RESEARCH II, PTS 1 AND 2 | 2012年 / 463-464卷
关键词
ceria; inorganic nanocrystals; oleate-modified precipitation method; hydrothermal treatment; fluorescence; SIZE; NANOPARTICLES; OXIDE; CELL;
D O I
10.4028/www.scientific.net/AMR.463-464.1501
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Monodispersed ceria nanocrystals have been synthesized by an oleate-modified precipitation method combined with a hydrothermal treatment at 200 degrees C. TEM observation indicated that ceria nanoparticles with low-crystallinity were produced by synthesis at room temperature, which were crystallized by subsequent heat treatment to form nanocrystals. Produced ceria nanocrystals were well dispersed in a nonpolar solvent and were hardly agglomerated. TEM observation and Raman spectroscopy clarified that the size of ceria nanocrystals was in the range of 2-7 nm. Interparticle distance of cerium nanocrystals two-dimensionally aligned was in the range of 1.5-4 nm, which corresponds to the exclusive distance of oleic chains. Oleate-modified ceria nanocrystals exhibited strong fluorescence by green-laser excitation. Fluorescent behavior of ceria nanocrystals indicated that oleate detachment from the ceria surface and particle growth of ceria nanocrystals could be induced by laser irradiation.
引用
收藏
页码:1501 / 1505
页数:5
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