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化学沉淀-水热法合成高矫顽力碳纳米管磁性复合材料(英文)
作者:曹慧群 魏波 王银治 李耀刚 朱美芳  
单位:深圳大学化学与化工学院 东华大学材料科学与工程学院 纤维改性国家重点试验室  
关键词:碳纳米管  包覆  化学处理  磁性能 
分类号:TB383.1
出版年,卷(期):页码:2009,37(10):1772-1776
DOI:
摘要:

采用化学沉淀-水热法成功的合成了一种新颖的Ni0.75Zn0.25Fe2O4纳米晶包覆多壁碳纳米管(Ni0.75Zn0.25Fe2O4-CNTs)磁性复合材料。采用透射电镜、X射线衍射、红外光谱和振动样品磁强计等方法对制备的样品进行了表征。透射电镜结果表明Ni0.75Zn0.25Fe2O4纳米晶包覆在碳纳米管表面,纳米晶的大小为8~15nm。X射线衍射结果表明:200℃是制备纳米Ni0.75Zn0.25Fe2O4包覆碳纳米管复合材料较好的反应条件,比合成单相Ni0.75Zn0.25Fe2O4纳米晶的温度要低。磁性复合材料中Ni0.75Zn0.25Fe2O4晶体的大小约为16.0nm。红外结果表明NiZn的特征峰在590cm-1和414cm-1处。磁滞回线结果表明室温下复合材料具有较高的矫顽力(Hc=27244.3kA/m)。

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A highly coercive magnetic composite(Ni0.75Zn0.25Fe2O4-CNTs) of multi-walled carbon nanotube(CNTs) coated with Ni0.75Zn0.25Fe2O4 nanocrystals was synthesized by chemical precipitation-hydrothermal process.The composite was characterized by transmission electron microscopy(TEM),X-ray powder diffraction(XRD),Fourier transform spectroscopy(FTIR) and vibrating sample magnetometer(VSM).The TEM images show that the CNTs surface is attached to Ni0.75Zn0.25Fe2O4 nanocrystals,and the average size of Ni0.75Zn0.25Fe2O4 nanocrystals is 8-15 nm.The XRD results indicate that Ni0.75Zn0.25Fe2O4-CNTs can be obtained at 200 ℃ as an appropriate hydrothermal temperature,which is lower than a synthesis temperature for single phase Ni0.75Zn0.25Fe2O4 nanocrystals.The particle size of Ni0.75Zn0.25Fe2O4 attached on the surface of CNTs is about 16 nm.The FTIR results reflect that the bands at 590 and 414 cm-1 are the characteristic bands of NiZn ferrite.The magnetic measurement by the VSM show that the composite has a high coercive force of 27.244 36 RA/m at room temperature.

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基金项目:
深圳市功能高分子重点实验室开放基金(FP20090016)资助项目
作者简介:
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参考文献:

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