摘要
采用化学共沉淀法制备了约25±5 nm磁性四氧化三铁(Fe3O4)纳米粒子,并采用3-氨丙基三乙氧基硅烷(APTES)将Fe3O4纳米粒子表面修饰上氨基(-NH2)官能团,获得了表面氨基化的磁性Fe3O4纳米粒子.利用X-射线粉末衍射仪(XRD),透射电子显微镜(TEM),带有能谱仪(EDS)的扫描电子显微镜(SEM),光电子能谱仪(XPS),以及磁学测量系统(MPMS)对粒子的结构和性能进行了表征和分析.结果表明:表面氨基化后的磁性粒子粒径略有增加,室温下磁化强度由原来的64 emu/g变为62.5 emu/g,较好的保留了原始磁性特征.本研究结果对揭示纳米材料结构与性能关系、以及表面功能化磁性纳米材料制备与应用具有重要意义.
Magnetic Fe3O4 nanoparticles of 25 ± 5 nm are prepared by modified chemical co-precipitation, and corresponding amino- coated magnetite nanoparticles are also obtained via surface 3 -aminopropyltriethyloxy silane (APTES) modification. The particles properties and structure are characterized and analyzed by X-Ray powder diffraction ( XRD), scanning electron microscopy ( SEM ) with the energy dispersive spectroscopy ( EDS), the Zetasizer Nanoinstrument, X - Ray photoelectron spectroscopy (XPS) and magnetic property measurement system (MPMS) with superconducting quantum interference device (SQUID) magnetometry. The result reveals that the magnetic particles have a slight dimensional increase in average diameter ,and that they while retain almost original saturation magnetization from 64 emu g - 1 to 62.5 emu g - 1 after amino coating. The findings are instructive to elucidate in depth some relationship between nanoparticle structure and property as well as in surface functionalization for nanomaterials fabrication and application.
出处
《南华大学学报(自然科学版)》
2007年第1期19-24,29,共7页
Journal of University of South China:Science and Technology
基金
国家自然科学基金资助项目(20505020)
中国包装总公司科研项目(04ZBKJA004)
湖南省教育厅资助项目(05C508)
湖南省普通高校青年骨干教师资助计划项目(2005-2008)
关键词
磁性FE3O4纳米粒子
共沉淀法
合成
表面修饰
氨基化
magnetite nanoparticles
coprecipitation
preparation
surface modification
amino - functionalization