Synthesis of Variable-Sized Fe3O4 Nanocrystals by Visible Light Irradiation at Room Temperature
Synthesis of Variable-Sized Fe3O4 Nanocrystals by Visible Light Irradiation at Room Temperature
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DOI：
10.1021/jp912162g
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发表时间：
2010-08-19
影响因子：
3.7
通讯作者：
Wei, Yu
中科院分区：
文献类型：
--
作者：
Chen, Rufen;Song, Guoqiang;Wei, Yu
研究了在可见光照射下，在微量EDTA存在下，Fe（OH）（2）的空气氧化反应合成尺寸可变的Fe 3 O 4纳米粒子的新方法。在室温下，通过改变水溶液中的反应条件，可以将Fe_3O_4纳米晶的尺寸控制在11.5- 30.0nm之间。在EDTA存在下，可见光显著加速氧化反应。快速的氧化速率有利于减小Fe 3 O 4纳米晶的尺寸。所得Fe 3 O 4颗粒呈均匀球形，粒径分布窄。不同尺寸的Fe 3 O 4纳米晶具有不同的磁性。
A rational new method for the synthesis of variable-sized Fe3O4 nanoparticles by aerial oxidation of Fe(OH)(2) under visible light irradiation in the presence of trace EDTA has been investigated. The size of the Fe3O4 nanocrystals was controlled at about 11.5-30.0 nm by varying the reaction conditions in aqueous solution at room temperature. The oxidation reaction was significantly accelerated by visible light in the presence of EDTA. A rapid oxidation rate was favorable for decreasing the size of the Fe3O4 nanocrystals. The as-obtained Fe3O4 particles showed uniform spherical shape and a narrow size distribution. The variable-sized Fe3O4 nanocrystals exhibited different magnetic properties.