Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/MgO catalyst using sol-gel method
- Authors
- Dubey, Prashant; Choi, Sang Kyu; Kim, Bawl; Lee, Cheol Jin
- Issue Date
- 4월-2012
- Publisher
- KOREAN CARBON SOC
- Keywords
- thermal decomposition; citrate precursor; nanoclusters; thin-multiwalled carbon nanotubes
- Citation
- CARBON LETTERS, v.13, no.2, pp.99 - 108
- Indexed
- KCI
- Journal Title
- CARBON LETTERS
- Volume
- 13
- Number
- 2
- Start Page
- 99
- End Page
- 108
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108823
- DOI
- 10.5714/CL.2012.13.2.099
- ISSN
- 1976-4251
- Abstract
- The sol-gel technique has been studied to fabricate a homogeneous Fe-Mo/MgO catalyst. Ambient effects (air, Ar, and H-2) on thermal decomposition of the citrate precursor have been systematically investigated to fabricate an Fe-Mo/MgO catalyst. Severe agglomeration of metal catalyst was observed under thermal decomposition of citrate precursor in air atmosphere. Ar/H-2 atmosphere effectively restricted agglomeration of bimetallic catalyst and formation of highly-dispersed Fe-Mo/MgO catalyst with high specific surface-area due to the formation of Fe-Mo nanoclusters within MgO support. High-quality thin-multiwalled carbon nanotubes (t-MWCNTs) with uniform diameters were achieved on a large scale by catalytic decomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere. The produced t-MWCNTs had outer diameters in the range of 4-8 nm (average diameter similar to 6.6 nm) and wall numbers in the range of 4-7 graphenes. The as-synthesized t-MWCNTs showed product yields over 450% relative to the utilized Fe-Mo/MgO catalyst, and indicated a purity of about 85%.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.