A temperature window for the synthesis of single-walled carbon nanotubes by catalytic chemical vapor deposition of CH4 over Mo-Fe/MgO catalyst.
A temperature window of single-walled carbon nanotubes (SWCNTs) growth has been studied by Raman spectroscopy. The results presented when temperature lower than 750 degrees C, there were few SWCNTs formed, and when temperature higher than 900 degrees C, mass amorphous carbons were formed in the SWCNTs bundles due to the self-decomposition of CH4. The temperature window of SWCNTs efficiently growth is between 800 and 900 degrees C, and the optimum growth temperature is about 850 degrees C. These results were supported by transmission electron microscope images of samples formed under different temperature. The temperature window is important for large-scale production of SWCNTs by catalytic chemical vapor deposition method.
Ouyang
Y
Y
Department of Physics, Lin Yi Normal University, 276005, China. ouyangyu1976@tom.com
Chen
L
L
Liu
Q X
QX
Fang
Y
Y
D002384:Catalysis; D007501:Iron / Q000737:chemistry*; D008277:Magnesium Oxide / Q000737:chemistry*; D008697:Methane / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D008982:Molybdenum / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014835:Volatilization
D037742:Nanotubes, Carbon; D008277:Magnesium Oxide; D008982:Molybdenum; D007501:Iron; D008697:Methane