A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH(4) over Mo(2)-Fe(10)/MgO Catalyst

Ouyang Yu; Li Daoyong; Cao Weiran; Shi Shaohua; Chen Li

doi:10.1007/s11671-009-9284-z

A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH(4) over Mo(2)-Fe(10)/MgO Catalyst

Nanoscale Res Lett. 2009 Mar 4;4(6):574-577. doi: 10.1007/s11671-009-9284-z.

Authors

Ouyang Yu¹, Li Daoyong, Cao Weiran, Shi Shaohua, Chen Li

Affiliation

¹ Lab for Nano-functional Materials, Lin Yi Normal University, Shandong, 276005 China.

Abstract

A temperature window for the synthesis of single-walled carbon nanotubes by catalytic chemical vapor deposition of CH(4) over Mo(2)-Fe(10)/MgO catalyst has been studied by Raman spectroscopy. The results showed that when the temperature is lower than 750 degrees C, there were few SWCNTs formed, and when the temperature is higher than 950 degrees C, mass amorphous carbons were formed in the SWCNTs bundles due to the self-decomposition of CH(4). The temperature window of SWCNTs efficient growth is between 800 and 950 degrees C, and the optimum growth temperature is about 900 degrees 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.