二组元酞菁固相混合法裂解合成直立碳纳米管

通过向两种金属酞菁的混合物添加一定量的硫粉，在800～950 ℃裂解合成了大面积的直立碳纳米管。采用场发射扫描电镜(FE-SEM)、高分辨透射电镜(HRTEM)和拉曼光谱对产物进行了观察和表征，结果显示：所合成的碳纳米管(直径为15～35 nm，长度为200～800 nm)管身平直，具有很好的石墨化程度，且杂质很少。采用两种金属酞菁((M(Ⅱ)Pc, M=Fe, Co))进行混合裂解时，既可以提供碳源，而且可以产生相当均匀的催化剂颗粒，有利直立碳纳米管的沉积。这种将两种酞菁进行固相混合裂解的方法，相当安全高效，有利于大规模生产直立碳纳米管。

A Solid-state Hybrid Method to Synthesize Straight Carbon Nanotubes by Pyrolysis of Two Mixed Metal Phthalocyanines

Straight carbon nanotubes (CNTs) were synthesized in large scale through thermal chemical vapor deposition(TCVD) by pyrolysis of two mixed metal phthalocyanines with a certain amount of sulfur at 800～950 ℃. The results by field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HRTEM) and Raman spectroscopy (Raman) reveal that the as-synthesized CNTs (15～35 nm in diameter, 200～800 nm in length) are quite straight and well-graphitized with nearly no defects. Two kinds of mixed transition metal phthalocyanines(M(Ⅱ)Pc, M=Fe, Co) were used as carbon source to obtain uniform catalysts favoring the growth of the straight CNTs. The solid-state hybrid method is quite safe and efficient for synthesis of straight carbon nanotubes in large scale.