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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Preparation and magnetic property of multi-walled carbon nanotube/α-Fe2O3 composites
CHEN Chuan-sheng(陈传盛)1, 2, LIU Tian-gui(刘天贵)3, CHEN Xiao-hua(陈小华) 2,
LIN Liang-wu(林良武)1, LIU Qi-cheng(刘其城)2, XIA Qing(夏

1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. College of Physics and Electronic Science, Changsha University of Science and Technology,
Changsha 410114, China;
3. College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China

Abstract:In order to attain new functional nanomaterials with good magnetic property, multi-walled carbon nanotubes/hematite (MWNTs/α-Fe2O3) composites were synthesized using the co-deposition method. MWNTs/α-Fe2O3 composites were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy(TEM), Raman spectroscopy and vibrating sample magnetometry (VSM). The experimental results show that the structure and magnetic properties of the MWNTs/α-Fe2O3 composites are related to the heat treatment temperature. MWNTs are modified by α-Fe2O3 nano-particles and α-Fe2O3 nanorods with a diameter of 10−50 nm after being treated at 450 ℃. When the heat treatment temperature exceeds 600 ℃, MWNTs are only modified by Fe3O4 particles. Furthermore, the MWNTs composites treated at 450 ℃ and 600 ℃ have good magnetic behaviour.

 

Key words: carbon nanotubes; α-Fe2O3; magnetic property

ISSN 1672-7029
CN 43-1423/U

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