Importance of oxygen in the metal-free catalytic growth of single-walled carbon nanotubes from SiOx by a vapor-solid-solid mechanism

Liu, Bilu, Tang, Dai-Ming, Sun, Chenghua, Liu, Chang, Ren, Wencai, Li, Feng, Yu, Wan-Jing, Yin, Li-Chang, Zhang, Lili, Jiang, Chuanbin and Cheng, Hui-Ming (2011) Importance of oxygen in the metal-free catalytic growth of single-walled carbon nanotubes from SiOx by a vapor-solid-solid mechanism. Journal of The American Chemical Society, 133 2: 197-199. doi:10.1021/ja107855q


Author Liu, Bilu
Tang, Dai-Ming
Sun, Chenghua
Liu, Chang
Ren, Wencai
Li, Feng
Yu, Wan-Jing
Yin, Li-Chang
Zhang, Lili
Jiang, Chuanbin
Cheng, Hui-Ming
Title Importance of oxygen in the metal-free catalytic growth of single-walled carbon nanotubes from SiOx by a vapor-solid-solid mechanism
Formatted title
Importance of oxygen in the metal-free catalytic growth of single-walled carbon nanotubes from SiOx by a vapor-solid-solid mechanism
Journal name Journal of The American Chemical Society   Check publisher's open access policy
ISSN 0002-7863
1520-5126
1943-2984
Publication date 2011-01-19
Year available 2010
Sub-type Article (original research)
DOI 10.1021/ja107855q
Open Access Status Not Open Access
Volume 133
Issue 2
Start page 197
End page 199
Total pages 3
Place of publication Washington, DC, U.S.A.
Publisher American Chemical Society
Language eng
Formatted abstract
To understand in-depth the nature of the catalyst and the growth mechanism of single-walled carbon nanotubes (SWCNTs) on a newly developed silica catalyst, we performed this combined experimental and theoretical study. In situ transmission electron microscopy (TEM) observations revealed that the active catalyst for the SWCNT growth is solid and amorphous SiOx nanoparticles (NPs), suggesting a vapor−solid−solid growth mechanism. From in situ TEM and chemical vapor deposition growth experiments, we found that oxygen plays a crucial role in SWCNT growth in addition to the well-known catalyst size effect. Density functional theory calculations showed that oxygen atoms can enhance the capture of −CHx and consequently facilitate the growth of SWCNTs on oxygen-containing SiOx NPs.
Keyword Nanoparticles
Graphitization
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published on Web 12/14/2010

 
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Created: Sun, 20 Feb 2011, 10:03:07 EST