Novel aerosol method for aligned carbon nanotubes synthesis
(1. National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China;
2. Vacuum Metallurgy Key Laboratory for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;
3. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
4. Yunnan Nationality University, Kunming 650031, China)
2. Vacuum Metallurgy Key Laboratory for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;
3. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
4. Yunnan Nationality University, Kunming 650031, China)
Abstract: A novel aerosol method for the production of alighed carbon nanotubes was presented. Multi-walled carbon nanotubes (MWNTs) with fairly uniform diameters and aligned MWNT bundles were obtained by using solutions of organometallics such as ferrocene in hydrocarbon solvents. A hollow and multi-walled structure was observed with diameter ranging from 15 to 50 nm, leading aspect ratio to be over 200. The quality of the product is dependent on the pyrolysis temperature, carrier gas flow rate and the catalyst precursor concentration. For the sample synthesized at 900 ℃, G/D is 1.81. G/D of samples obtained at 850 ℃ and 800 ℃ are 1.18 and 0.77, respectively. The inclusion of acetylene to an atomized spray of ferrocene in hexane yield aligned MWNT bundles with a narrow diameter distribution.
Key words: aerosol; carbon nanotubes; aligned morphology