憎水性三金属纳米粒子的合成、表征及磁性

doi:10.7517/j.issn.1674-0475.2010.03.173

影像科学与光化学 ›› 2010, Vol. 28 ›› Issue (3): 173-181.DOI: 10.7517/j.issn.1674-0475.2010.03.173

憎水性三金属纳米粒子的合成、表征及磁性

戴兢陶^1,2, 王新红², 孙玉凤², 沈明^1,3

1. 盐城师范学院, 江苏省滩涂生物资源与环境保护重点建设实验室, 江苏, 盐城, 224051;
2. 盐城师范学院, 化学化工学院, 江苏, 盐城, 224051;
3. 扬州大学, 化学化工学院, 江苏, 扬州, 225002

收稿日期:2010-01-06 修回日期:2010-02-09 出版日期:2010-05-23 发布日期:2010-05-23
通讯作者: 沈明,E-mail:shenming@yzu.edu.cn.
基金资助:
江苏省高校自然科学基础研究项目资助(08KJD150020);江苏省滩涂生物资源与环境保护重点建设实验室项目资助(JLCBE09025,09003)

Synthesis,Characterization and Magnetic Properties of Hydrophobic Trimetal Nanoparticles

DAI Jing-tao^1,2, WANG Xin-hong², SUN Yu-feng², SHEN Ming^1,3

1. Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers College, Yancheng 224051, Jiangsu, P. R. China;
2. School of Chemistryand Chemical Engineering, Yancheng Teachers College, Yancheng 224051, Jiangsu, P. R. China;
3. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, P. R. China

Received:2010-01-06 Revised:2010-02-09 Online:2010-05-23 Published:2010-05-23

摘要/Abstract

摘要： 以磺基琥珀酸二辛酯钠盐(AOT)为表面活性剂,采用反胶束法合成了憎水性CoFe/Au纳米粒子, 利用配体交换、水洗等去除AOT并使纳米粒子分级.采用紫外-可见光谱(UV-Vis)、透射电镜(TEM)、X射线衍射(XRD)、X射线电子能量散射(EDX)及等离子发射光谱 (ICP)等对产物进行了表征,通过超导量子干涉仪(SQIUD)研究了纳米粒子的磁性质.结果表明,反胶束法合成的CoFe/Au三金属纳米粒子具有较好的单分散性和稳定性,平均粒径约为4 nm.当外磁场强度为1.5×10⁴ A/m时,阻塞温度T_b为65 K,温度高于T_b时纳米粒子显示出超顺磁性,低于T_b时呈铁磁性,在5 K时其矫顽力(Hc)达4.67×10⁴ A/m.

关键词: 反胶束, 配体交换, CoFe/Au纳米粒子, 磁性质

Abstract: CoFe/Au nanoparticles were prepared by reverse micelle method in the n-hexane solution of sodium bis (2-ethylhexyl)sulfosuccinate (AOT).The CoFe/Au nanoparticles of different size were separated after ligand exchange was fulfilled and AOT was removed by washing of water.The nanoparticles were characterized by ultraviolet visible spectroscopy (UV-Vis),transmission electron microscopy (TEM),X-ray diffraction (XRD),energy dispersive X-ray absorption (EDX) and plasma-atomic emission spectrometry (ICP),respectively.The magnetic properties of CoFe/Au nanoparticles were measured on Superconducting quantum interference device (SQUID).The results indicated that the size of nanoparticles was ca.4 nm and the nanoparticles had very good stability and monodispersity.When a 1.59×10⁴ A/m field was applied,the blocking temperature of CoFe/Au nanoparticles T_b was 65 K.The particles were superparamagnetic above T_b,while the particles were ferromagnetic below T_b with Hc (4.67×10⁴ A/m) at 5 K.

Key words: reverse micelles, ligand exchange, CoFe/Au nanoparticles, magnetic properties

中图分类号:

戴兢陶, 王新红, 孙玉凤, 沈明. 憎水性三金属纳米粒子的合成、表征及磁性[J]. 影像科学与光化学, 2010, 28(3): 173-181.

DAI Jing-tao, WANG Xin-hong, SUN Yu-feng, SHEN Ming. Synthesis,Characterization and Magnetic Properties of Hydrophobic Trimetal Nanoparticles[J]. Imaging Science and Photochemistry, 2010, 28(3): 173-181.

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憎水性三金属纳米粒子的合成、表征及磁性

Synthesis,Characterization and Magnetic Properties of Hydrophobic Trimetal Nanoparticles

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