fulltext.study @t Gmail

Water assisted synthesis of double-walled carbon nanotubes with a narrow diameter distribution from methane over a Co–Mo/MgO catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
55410 47052 2012 8 PDF Available
Title
Water assisted synthesis of double-walled carbon nanotubes with a narrow diameter distribution from methane over a Co–Mo/MgO catalyst
Abstract

Double-walled carbon nanotubes (DWCNTs) with a narrow diameter distribution have been synthesized with the assistance of water vapor in a fluidized-bed reactor from methane over a Co–Mo/MgO catalyst. The results reveal that an appropriate amount of water enhances the carbon yield and also changes the diameter distribution of the DWCNTs. An excess amount of water depresses the formation of carbon nanotubes due to the stabilization of the Co–molybdate phase. Water facilitates the formation of adjacent Co and CoO phases, and therefore methane activation and carbon nanotube formation. The formation of adjacent Co and CoO phases results in smaller Co nanoparticles. DWCNTs with narrow diameter distribution are produced with this method at a low cost.

Graphical abstractDouble-walled carbon nanotubes with a narrow diameter distribution are produced with the assistance of water over a Co–Mo/MgO catalyst.Figure optionsDownload full-size imageDownload high-quality image (65 K)Download as PowerPoint slideHighlights► Double-walled carbon nanotubes (DWCNTs) are synthesized over a Co–Mo/MgO catalyst. ► An appropriate amount of water enhances the carbon yield. ► DWCNTs with a narrow diameter distribution are obtained with the assistance of water.

Keywords
DWCNTs growth; Narrow diameter distribution; Water-assisted CVD; Co–Mo/MgO catalyst
First Page Preview
Water assisted synthesis of double-walled carbon nanotubes with a narrow diameter distribution from methane over a Co–Mo/MgO catalyst
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 183, Issue 1, 20 March 2012, Pages 26–33
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis