催化剂对碳纳米管产率及质量的影响

The Effect of Different Catalysts on the Quality and Yield of the Carbon Nanotubes Synthesized by Thermal Decomposition

本文研究了添加钴/二茂铁、镍/二茂铁、钴、镍/钴不同催化剂对高温热解法制备碳纳米管质量、产率等的影响。高分辨率透射电镜图象显示在800℃左右,镍/二茂铁、钴/二茂铁和钴催化条件下,有多壁碳纳米管生成,而用镍/钴作催化剂时,只有直径在0 5μm左右,长度十几个微米的非晶态棒状物生成。通过对生成碳纳米管的质量和产量进行比较,催化剂的催化活性满足二茂铁>钴>镍。简单分析了在碳源高温热解环境下不同金属催化剂的性能差异,并对不同催化条件下生成物的拉曼光谱进行了分析。

The effect of cobalt/ferrocene, nickel/ferrocene, cobalt and nickel/cobalt catalysts on the quality and yield of carbon nanotubes produced by thermal decomposition has been studied. TEM images reveal that carbon nanotubes can be catalyzed by Ni/ferrocene, Co/ferrocene and Co under about 800℃, while nothing but amorphous carbon rods with 0.5 μm in diameter and more than 10 μm in length are generated when Ni/Co were used as catalysts. The catalysts affect the quality and yield of the carbon nanotubes in the order: ferrocene>Co>Ni. The difference of different catalysts on the growth of the carbon nanotubes by thermal decomposition is discussed and their Raman spectra are studied.