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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15～35nm,长度为200～800nm)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。
By adding a certain amount of sulfur powder to the mixture of two metal phthalocyanines, a large area of upright carbon nanotubes were synthesized by cracking at 800-950 ° C. The products were observed and characterized by field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy. The results showed that the synthesized carbon nanotubes (diameter 15 ~ 35nm and length 200 ~ 800nm) tube straight, with good degree of graphitization, and few impurities. The mixed pyrolysis of two metal phthalocyanines ((M (II) Pc, M = Fe, Co) can provide both a carbon source and relatively uniform catalyst particles that favor the deposition of upright carbon nanotubes. This method of two kinds of phthalocyanine solid phase mixed cracking, quite safe and efficient, is conducive to large-scale production of upright carbon nanotubes.