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	The confined growth of double-walled carbon nanotubes in porous catalysts by chemical vapor deposition
	Liu, Yi ; Qian, Wei-zhong ; Zhang, Qiany ; Ning, Guo-qing ; Wen, Qian ; Luo, Guo-hua ; Wei, Fei
	2010-05-07 ; 2010-05-07
关键词	LARGE-SCALE SYNTHESIS HIGH-YIELD DIAMETER LONG MGO Chemistry, Physical Materials Science, Multidisciplinary
中文摘要	Double-walled carbon nanotubes (DWCNTs) were prepared from methane using a Fe/MgO porous catalyst. A series of catalyst powders with different pore size distributions were obtained by compression at pressures of 0-233 MPa. These were used to decompose methane and synthesize DWCNTs which differed in activity, purity, yield and degree of perfection. Characterization by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, thermo-gravimetric analysis, N-2 adsorption measurement (Brunauer-Emmett-Teller (BET)) and Hg penetration provided direct evidence that a compact catalyst structure is not good for the nucleation and growth of DWCNTs, e.g., a catalyst with a compact structure that did not have pores larger than 30-50 nm mostly produced multi-walled carbon nanotubes. The confined growth and buckling model of DWCNTs inside the porous catalysts are proposed to explain the growth behavior. These results suggest that a porous catalyst for DWCNT synthesis should have a large pore size distribution or loose stacked structure, which provides new guidelines for catalyst design. (C) 2008 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17416]
专题	清华大学
推荐引用方式 GB/T 7714	Liu, Yi,Qian, Wei-zhong,Zhang, Qiany,et al. The confined growth of double-walled carbon nanotubes in porous catalysts by chemical vapor deposition[J],2010, 2010.
APA	Liu, Yi.,Qian, Wei-zhong.,Zhang, Qiany.,Ning, Guo-qing.,Wen, Qian.,...&Wei, Fei.(2010).The confined growth of double-walled carbon nanotubes in porous catalysts by chemical vapor deposition..
MLA	Liu, Yi,et al."The confined growth of double-walled carbon nanotubes in porous catalysts by chemical vapor deposition".(2010).

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