Abstract: In order to improve the yield and quality of carbon nanotubes,it is an important way to change the composition of catalyst。 In the experiment of carbon nanotubes prepared by pyrolysis flame method,the effect of the content of iron and nickel on the quality and yield of CNTs in the catalyst were compared.The resulting CNTs were systematically characterized through SEM,Raman and TEM.The results showed that the quality of CNTs was better when the content of Fe was low,but the yield was very little.When the content of Fe was high,the yield of CNTs was higher,but the impurity in CNTs will increase obviously,and the graphitization degree of CNTs will decrease evidently.Therefore the overall quality of CNTs was the best when Fe∶Mo∶Al=1∶0.17∶16 in catalyst.Adding a small amount of Ni to the iron based catalyst-Fe/Mo/Al2O3 will improve the quality of CNTs,but the quality of CNTs will decrease after Ni overdose.When the ratio of elements in Fe/Ni-Mo/Al2O3 was Fe∶Ni∶Mo∶Al=1∶0.5∶0.17∶16,the yield of CNTs in synthetic products was higher,quality was better and its orientation was better.
翟刚, 贾小伟, 郭永红, 吴楚瑜, 孙亚萍, 康志忠, 孙保民. 铁基催化剂组成对热解火焰法合成碳纳米管的影响[J]. 化工新型材料, 2019, 47(5): 109-113.
Zhai Gang, Jia Xiaowei, Guo Yonghong, Wu Chuyu, Sun Yaping, Kang Zhizhong, Sun Baomin. Influence of the composition of iron based catalyst on CNTs synthesis by pyrolysis flame method. New Chemical Materials, 2019, 47(5): 109-113.
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