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采用柠檬酸络合法制得不同Ni含量的Ni/MgO催化剂,然后将其应用到气相沉积(CVD)过程中制备磁性碳纳米管(CNTs)。碳管在生长过程中原位包裹磁性Ni金属氧化物颗粒进入管内,从而一步制得了磁性CNTs。将制得的磁性CNTs采用透射电子显微镜、电子扫描电镜、X射线衍射仪、红外光谱仪、低温N2吸附仪和振动样品磁强计等手段进行表征。结果表明:通过一步法可以成功地原位包裹Ni制得CNTs,且所得CNTs具有较强磁性,碳管表面引入功能化基团和具有较大的比表面积。
Ni / MgO catalysts with different Ni content were prepared by citric acid complexation method, and then applied to the CVD process to prepare magnetic carbon nanotubes (CNTs). Carbon nanotubes wrapped in situ magnetic Ni metal oxide particles into the tube during the growth process, thereby obtaining magnetic CNTs in one step. The prepared magnetic CNTs were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, infrared spectroscopy, low temperature N2 adsorption instrument and vibrating sample magnetometer. The results show that CNTs can be successfully prepared by one-step coating in situ, and the obtained CNTs are highly magnetic. The functionalized groups on the surface of carbon nanotubes and the large specific surface area are obtained.