Magnetic carbon nanotube (CNT) composites have been successfully synthesized by chemical vapor deposition (CVD). The resulting composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The experimental results indicated that the prepared maghemite (γ-Fe2O3) nanoparticles decorate the surface of CNTs homogeneously. With increasing the synthesis temperature, the average diameter of γ-Fe2O3 nanoparticles as well as its saturation magnetization and coercivity increases. It is suggested that the size of nanoparticles and magnetic properties of CNT composites were easily controlled by changing the synthesis temperature.%利用化学气相沉积法,以二茂铁和水为原料,在碳纳米管表面包覆氧化铁纳米颗粒,制备出磁性氧化铁/碳纳米管复合材料.采用X射线衍射( XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)以及振动样品磁强计( VSM)对复合材料进行了表征.结果表明,包覆在碳纳米管上的是γ相Fe2O3纳米颗粒,它们均匀分布在碳纳米管表面.随着合成温度的升高,γ-Fe2O3纳米颗粒的平均粒径增大,γ-Fe2O3/碳纳米管复合材料的饱和磁化强度和矫顽力也随之增大.因此,通过简单的合成温度调节即可以实现碳纳米管复合材料纳米颗粒尺寸和磁性的控制.
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