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Double-walled carbon nanotubes were prepared using the floating chemical vapor deposition with methane as carbon source and adding small amount of sulfur into the ferrocene catalyst. The optimized technological parameters are: the reaction temperature is 1200CCCCCCCCCCCCCCCCCC; the catalyst vapor temperature is 80CCCCCCCCCCCCCCCCC; the flow rate of argon is 2000
The optimized technological parameters are: the reaction temperature is 1200CCCCCCCCCCCCCCCCCC; the catalyst vapor temperature is 80CCCCCCCCCCCCCCCCC; the flow rate of argon is 2000