Synthesis and characterization of magnetic Fe/CNTs composites with controllable Fe nanoparticle concentration

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• 作者：Fan Zhao ; Hongyan Duan ; Weigao Wang ; Jun Wang ; ^{wjnaf@ustc.edu}
• 关键词：Multi-walled CNTs ; Magnetic properties ; Composites ; Fe
• 刊名：Physica B
• 出版年：2012
• 出版时间：1 July, 2012
• 年：2012
• 卷：407
• 期：13
• 页码：2495-2499
• 全文大小：650 K

文摘

Fe/CNTs composites, with different concentrations of Fe nanoparticles (NPs) on carbon nanotube (CNT) surfaces, were successfully fabricated via a facile solvothermal method. The lengths of CNTs are up to 10 ¦Ìm and the mean diameter of the Fe nanoparticles is about 25 nm. The structures, composition and magnetic properties of the Fe/CNTs were characterized by XRD, FTIR, FE-SEM, TEM and PPMS. We found that the concentrations of Fe nanoparticles depositing on the CNTs could be controlled by adjusting the initial mass ratio of ferrocene to CNTs. The Fe/CNTs composites display good ferromagnetic properties at room temperature, with a saturation magnetization of 125 emu/g-Fe and a coercivity of 276 Oe. The Curie temperature of the sample is about 1038 K, slightly lower than that (1043 K) of the bulk iron.