采用柠檬酸燃烧法制备了添加Fe助剂的Ni基催化剂，考察了焙烧温度对合成碳纳米管的影响。通过CVD-IP技术对制备的催化剂活性进行了评估，450℃下焙烧的催化剂催化所得的碳纳米管的收率以及产率较高，分别为21.88%、4.40 g （c）/g （cat）（每克催化剂生产的碳纳米管质量）。利用H₂-TPR、XRD对不同焙烧温度下催化剂的还原行为、物相结构进行分析，结果表明，随着焙烧温度的升高，催化剂的晶粒尺寸变大，还原过程越难进行。TG-DTG测试结果表明，所制备的碳纳米管具有良好的热稳定性。FT-IR表征结果表明，其表面具有较多的含氧官能团，避免了氧化性酸热回流等复杂处理，这有利于其进一步的应用。TEM表征结果表明，碳纳米管的端口为开口结构，同时，焙烧温度的升高会导致较大管径的碳纳米管的生成。

Ni-based catalyst with Fe as assistant is prepared by means of citric acid combustion method.The influences of calcination temperature for the catalyst on its performance in the synthesis of carbon nanotubes are investigated.The activity of the catalyst is evaluated by CVD-IP technology,indicating that the catalyst calcinated at 450℃ has higher yield of 21.88% and productivity of 4.40 g(c)/g(cat) for carbon nanotubes.The reduction actions and phase structure of the catalysts prepared by different calcination temperature are analyzed by H₂-TPR and XRD.It is found that the grain size of the catalysts becomes larger and the reduction process performs more difficultly as the calcination temperature increases.TG-DTG detection result shows that the obtained carbon nanotubes have better thermal stability.FT-IR characterizes that the surface of carbon nanotubes has more oxygen-functional groups,which can avoid the complicated oxidative acid heat reflux treatment and provides a convenient condition for the subsequent utilization of the prepared carbon nanotubes.By the characterization of TEM,the produced carbon nanotubes have the port opening structure and the increase of calcination temperature will lead to the formation of larger diameter of carbon nanotubes.

孙书雄(1993-),男,硕士研究生,主要从事催化材料的研究,1570418507@qq.com