A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH<sub>4</sub>over Mo<sub>2</sub>-Fe<sub>10</sub>/MgO Catalyst
oleh: Yu Ouyang, Daoyong Li, Weiran Cao, Shaohua Shi, Li Chen
| Format: | Article |
|---|---|
| Diterbitkan: | SpringerOpen 2009-01-01 |
Deskripsi
<p>Abstract</p> <p>A temperature window for the synthesis of single-walled carbon nanotubes by catalytic chemical vapor deposition of CH<sub>4</sub>over Mo<sub>2</sub>-Fe<sub>10</sub>/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 CH<sub>4</sub>. 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.</p>