采用柠檬酸络合法制得不同 Fe 含量的 Fe/MgO 催化剂，并将其应用到气相沉积(CVD)过程中制备磁性碳纳米管。由 CVD 法制备碳纳米管(CNTs)的生长机理，利用碳管在生长过程中原位包裹磁性 Fe 金属氧化物颗粒进入管内的现象，使碳纳米管具有磁性，从而一步制得了磁性碳纳米管。将制得的磁性碳纳米管采用透射电子显微镜(TEM)、X 射线衍射仪(XRD)、红外光谱仪(IR)、低温 N2吸附仪(BET)、振动样品磁强计(VSM)等表征方法进行了测试。结果表明通过这种新型的一步法可以成功地原位包裹 Fe 制得碳纳米管，且制得的碳纳米管具有较强磁性和较大的比表面积，表面引入了功能化基团。
A series of Fe/MgO catalysts with different Fe/Mg ratios were prepared by sol-gel method.Accor-ding to the mechanism of CNT growth in chemical vapor deposition (CVD),the Fe metal particles were filled in the CNT channels during the CVD in situ.By this way,the ferrum-filled carbon nanotubes with magnetic properties were prepared.The magnetic CNTs were characterized by SEM,TEM,XRD,BET,FTIR to analyze their morphology and magnetic properties.The analysis results suggested that the prepared CNTs exhibit some of value of magnetization, high degree of functionalization and high specific surface area.
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