【摘要】 以乙二胺、二茂铁和硼氢化钠为原料 ,以N2 和H2 为辅气 ,用钴作催化剂 ,在不同温度下制备出了具有竹节状结构的硼碳氮 (BCN)纳米管 .根据透射电子显微镜观察 ,分析了BCN纳米管的生长机理 .B和N的同时掺杂 ,所形成的五边形结构比单独N掺杂时具有更低的形成能 ,是竹节状结构形成的主要原因 .用Raman光谱可以用来表征BCN纳米管中B和N的掺杂程度及纳米管的质量 .分析表明 ,在 86 0℃下制备的BCN纳米管竹节状结构最密集 ,质量最好 ,产率最高 .扫描俄歇微探针分析表明 ,在 86 0℃下制备的BCN纳米管的元素组成比为B∶N∶C =1 7∶1 5∶96 8.更多还原

【Abstract】 Bamboo shaped BCN nanotubes have been prepared by pyrolysis of ethylene diamine, ferrocene and sodium borohydride over cobalt catalyst in N 2/H 2 atmosphere at 780—970℃. The growth mechanisms of the bamboo shaped nanotubes are discussed based on the transmission electron microscopy(TEM) and Raman spectroscopic observations. A comparision of the structures for C, CN x and BCN nanotubes indicates that a pentagonal structure hybridized with both B and N has lower formation energy than with only N. This is the main reason for the bamboo shaped morphorlogy. It is shown that BCN nanotubes generated at 860℃ possess the densest bamboo shaped structure, best quality and highest yields. Scanning Auger micro probe analysis indicates that the composite ratio of B∶N∶C is 1.7∶1.5∶96.8.更多还原