纳米镍颗粒填充碳纳米管的制备与磁性能

采用自制的实验装置, 通过阳极弧放电等离子体技术成功制备了Ni纳米颗粒填充的碳纳米管, 利用高分辨透射电子显微镜(HRTEM)、 XRD、 TEM、 X射线能量色散分析谱仪(XEDS)和振动样品磁强计(VSM)等测试手段对样品的化学成分、 形态、 微观结构和磁性能进行了表征。实验结果表明, 采用本文中实验方法能获得大量被纳米金属颗粒填充的碳纳米管, 其内部填充物为面心立方(FCC)结构的纳米Ni颗粒, 外围薄层为石墨碳层。碳纳米管的外径为30~40 nm, 壁厚5~8 nm, 内部填充的纳米颗粒呈球形和椭球形, 粒径均匀, 在管腔内不连续分布。产物具有顺磁特性, 矫顽力是78 Oe, 饱和磁化强度是33 enu/g。

Preparation and magnetic property of Ni nanoparticles filled carbon nanotubes

Ni nanoparticles filled carbon nanotubes were successfully prepared by the anodic arc discharging plasma utilizing self-designed and fabricated experimental apparatus. The composition, morphology, microstructure and magnetic properties of the products by this process were investigated via the high-resolution transmission electron microscopy (HRTEM), XRD, TEM, X-ray energy dispersive spectrometry (XEDS) and vibration sample magnetmeter (VSM). The experiment results show that most of the products are filled with the metallic nanoparticles, while the particles inside are face centered cubic(FCC) structure Ni, and the outside are well-graphitized nanotubes. The diameter of carbon nanotubes ranges from 30 nm to 40 nm, with the wall thickness approximately 5-8 nm. The particles encapsulated in carbon nanotubes are scattered and noncontinuous homogeneously in spherical or ellipsoidal shapes. Magnetic property tests show that the products is super paramagnetic, with the coercivities of 78 Oe and the saturation magnetization of 33 emu/g.