摘要
采用浮动催化法,选用二茂铁做催化剂,在800～1040℃热解乙二胺/二茂铁前驱液制备CNx纳米管.对不同温度下制备出的CNx纳米管进行了透射电镜观察、拉曼光谱研究以及产量统计,结果表明,二茂铁催化下制备出的CNx纳米管具备较均匀的'竹节状'结构,并随制备温度的升高, CNx纳米管的平均直径增大,结晶有序度提高,产量也增加.X射线光电子谱测试分析进一步验证了纳米管中氮原子的掺杂.还对CNx纳米管生长过程中二茂铁的催化机理进行了探讨.
CNx nanotubes have been synthesized by thermal decomposition of ferrocene/ethylenediamine (Fe(C5H5)(2)/C2H8N2) mixture using ferrocene as the catalyst at 800 similar to 1040 degrees C. Transmission electron microscopy (TEM) and Raman spectroscopic were used to characterize the CNx nantoubes produced at different temperatures, whose yields were also investigated. It is shown that the CNx nanotubes have bamboo-like structure, and the average diameter, crystallinity and yields increase with the temperature increasing. X-ray photoelectron spectrum (XPS) revealed the nitrogen incorporation of the CNx nanotubes. The catalysis mechanism of ferrocene in the growth of the CNx nanotubes is also discussed.
基金
ProjectsupportedbytheFundforUniversityCreativeTalentofHenanProvince(1999125)andtheYouthScienceFoundationofZhengzhouInstituteofAeronauticalIndustryManagement.
关键词
CNX纳米管
高温热解
拉曼光谱
“竹节”状结构
CNx nanotubes
thermal decomposition
Raman spectroscopy
'bamboo-like' structure
