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A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH4over Mo2-Fe10/MgO Catalyst

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Author(s): Yu Ouyang | Daoyong Li | Weiran Cao | Shaohua Shi | Li Chen

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 6;
Start page: 574;
Date: 2009;
Original page

Keywords: Single-walled carbon nanotubes | Catalytic chemical vapor deposition | Raman spectroscopy

ABSTRACT
Abstract A temperature window for the synthesis of single-walled carbon nanotubes by catalytic chemical vapor deposition of CH4over Mo2-Fe10/MgO catalyst has been studied by Raman spectroscopy. The results showed that when the temperature is lower than 750 °C, there were few SWCNTs formed, and when the temperature is higher than 950 °C, mass amorphous carbons were formed in the SWCNTs bundles due to the self-decomposition of CH4. The temperature window of SWCNTs efficient growth is between 800 and 950 °C, and the optimum growth temperature is about 900 °C. These results were supported by transmission electron microscope images of samples formed under different temperatures. The temperature window is important for large-scale production of SWCNTs by catalytic chemical vapor deposition method.

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Tangokurs Rapperswil-Jona

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