催化化学气相沉积法制备螺旋形多壁碳纳米管(英文)

Helical multiwalled carbon nanotubes (h-MWCNTs) synthesized by catalytic chemical vapor deposition

以乙炔为碳源、FeMo/MgO催化剂为模板,采用催化化学沉积法制备了螺旋状多壁碳纳米管(hs-MWC-NTs)。其中FeMo/MgO模板,由作为发泡和助燃剂的柠檬酸燃烧而制成。FeMo/MgO催化剂的XRD谱图揭示其具有微晶的通性。应用SEM、TEM和Raman光谱剖析了合成的炭材料。SEM和TEM观察表明获得了hs-MWC-NTs;Raman光谱的D峰和G峰确认了所获碳纳米管(CNTs)的结晶状态。结果表明:此法乃是合成直径10nm～20nm螺旋形多壁碳纳米管的最容易和简便方法。

Helical multiwalled carbon nanotubes （h-MWCNTs） were synthesized by a catalytic chemical vapor deposi- tion method using acetylene as a carbon source and FeMo/MgO catalyst as a template, which was prepared by a combus- tion method using citric acid as a foaming and combustion additive. The XRD pattern revealed that the catalyst was crys- talline. Furthermore, the synthesized carbon materials were characterized by SEM, TEM, and Raman spectroscopy, where SEM and TEM images showed the formation of thin h-MWCNTs and the Raman spectrum confirmed the crystalline characteristics of the CNTs. This is an easy and simple method to synthesize h-MWCNTs with diameter of 20-30 nm.