Synthesis of nano onion-like fullerenes by using Fe/Al2O3 as catalyst by chemical vapor deposition

Nano-carbon materials were synthesized by the catalytic decomposition of acetylene at 400℃ by using Fe/Al2O3 as catalyst. The product was refluxed in 36% concentrated HCI at 60℃ for 48 h in order to remove the catalyst support. The samples were examined by scanning and high resolution transmission e...

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Bibliographic Details
Published in:Chinese science bulletin 2009, Vol.54 (1), p.137-141
Main Authors: Liu, XuGuang, Wang, CunJing, Yang, YongZhen, Guo, XingMei, Wen, HaiRong, Xu, BingShe
Format: Article
Language:English
Subjects:
Articles/Material Science
Chemistry/Food Science
Earth Sciences
Engineering
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
化学蒸发沉积作用
增长机制
纳米碳材料
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Summary:Nano-carbon materials were synthesized by the catalytic decomposition of acetylene at 400℃ by using Fe/Al2O3 as catalyst. The product was refluxed in 36% concentrated HCI at 60℃ for 48 h in order to remove the catalyst support. The samples were examined by scanning and high resolution transmission electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results show that nano onion-like fullerenes encapsulating a Fe3C core were obtained. These had a structure of stacked graphitic fragments, with diameters ranging from 15-50 nm. When the product was further heattreated at 1100℃ for 2 h, nano onion-like fullerenes with a clear concentric graphitic layer structure were obtained. The growth mechanism of nano onion-like fullerenes encapsulating metal cores is suggested to follow a vapor-solid growth model.
ISSN:1001-6538
1861-9541
DOI:10.1007/s11434-008-0573-1