气相火焰中铁钴镍合金表面沉积碳纳米管及形态分析

Morphology of Carbon Nanotubes Deposited on the Surface of Fe/Co/Ni Alloy by CH_4/Air Flames

利用甲烷在空气中扩散燃烧，以铁钴镍合金片为载体和催化剂合成了碳纳米管，借助扫描电子显微镜、透射电子显微镜和拉曼光谱等分析了碳纳米管的形貌和结构。在合金表面成功沉积了碳纳米管，其外径为8～10nm，内径为3nm，长度约为15μm，密度大且分布均匀。研究表明：与纯镍片相比，铁钴镍合金具有更好的催化效果。

Carbon nanotubes were synthesized directly on Fe/Co/Ni alloy surface without excess catalyst via methane diffusion flame synthesis method. Scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and Raman scattering spectra were used to characterize the morphology and structure of carbon nanotubes. The results show that on part of the alloy surface, well-graphitized and high-density carbon nanotubes are harvested with 8～10 nm of outer diameter, 3 nm inner diameter and 15μm in length. It indicates also that comparing to pure Ni metal, alloy is prefer to synthesis carbon nanotubes.