FUEL 235 |
| Multi-walled carbon nanotubes (MWNT) were synthesized by catalytic chemical vapor deposition (CCVD) on Ni/SiO2 catalyst. The effects of the carbon source and carrier gas on the yield and the morphology of CNTs in the process of fabricating carbon nanotubes (CNTs) were studied, and the effect mechanisms were presented. Carbon monoxide (CO) and methane (CH4) were used as carbon source to synthesize the CNTs. It is concluded that the yield of CNT with methane as carbon source is obviously higher than with monoxide as carbon source. Hydrogen (H2), nitrogen (N2), argon (Ar) and helium (He) were used as carrier gases in the process of preparing CNTs. It is considered that carrier gas plays an important role in the process of synthesizing CNTs and hydrogen is necessary in the CNTs synthesis process in that hydrogen can combine with amorphous carbon prior to CNTs. |
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Chemistry of Carbon Materials and Nanomaterials
8:30 AM-11:45 AM, Thursday, April 10, 2008 Morial Convention Center -- Rm. 240/241, Oral
Division of Fuel Chemistry |