The synthesis of carbon nanotubes (CNTs) by catalytic CVD using a Fe/Co-supported zeolite template

Well-shaped faujasite-type zeolite (FAU) octahedral crystals 15 ìm in size were synthesized hydrothermally in an autoclave. The synthesis solution had a molar composition of 3.5 Na 2 O : Al 2 O 3 : 2.1 SiO 2 : 1000 H 2 O. With this zeolite being the template, multi-walled carbon nanotubes (MWNTs) we...

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Bibliographic Details
Published in:Electronic materials letters 2011, 7(2), , pp.139-144
Main Authors: Zhao, Wei, Lee, Mi Jai, Kim, Hyung Tae, Kim, Ik Jin
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed Matter Physics
Materials Science
Nanotechnology
Nanotechnology and Microengineering
Optical and Electronic Materials
전자/정보통신공학
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Summary:Well-shaped faujasite-type zeolite (FAU) octahedral crystals 15 ìm in size were synthesized hydrothermally in an autoclave. The synthesis solution had a molar composition of 3.5 Na 2 O : Al 2 O 3 : 2.1 SiO 2 : 1000 H 2 O. With this zeolite being the template, multi-walled carbon nanotubes (MWNTs) were synthesized from Fe- and Co-supported zeolite (FAU) by catalytic chemical vapor deposition (CCVD) using acetylene as the carbon source. Field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and Raman spectroscopy investigations demonstrated a growth tendency in terms of the number of wall layers and yield of carbon nanotubes (CNTs) as the iron and cobalt contents were increased. It is inferred that Co is more effective than Fe for synthesizing high-quality CNTs.
ISSN:1738-8090
2093-6788
DOI:10.1007/s13391-011-0609-6