Effect of ultrasonic treatment on dispersibility of Fe3O4 nanoparticles and synthesis of multi-core Fe3O4/SiO2 core/shell nanoparticles

被引：95
|
作者：
Yang, CQ [1 ]
Wang, G [1 ]
Lu, ZY [1 ]
Sun, J [1 ]
Zhuang, JQ [1 ]
Yang, WS [1 ]
机构：
[1] Jilin Univ, Coll Chem, Alan G MacDiarmid Lab, Changchun 130012, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2005年 / 15卷 / 39期
关键词：
D O I：
10.1039/b505018a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ultrasonic treatment was employed to improve the dispersibility of the Fe3O4 nanoparticles dispersed in aqueous solutions. Electrophoresis and XPS spectra indicate that the ultrasonic treatment can induce the generation of chemisorbed hydroxyl groups and the oxidation of Fe2+ ions on the surface of the magnetic nanoparticles, thus resulting in improved dispersibility of the magnetic nanoparticles. After growth of silica protection layers on the Fe3O4 nanoparticles with different times of ultrasonic treatment, Fe3O4/SiO2 core/shell nanoparticles with different amounts of the magnetic cores were successfully prepared.
引用
收藏
页码：4252 / 4257
页数：6
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