Open AccessLarge scale synthesis of single-walled carbon nanotubes by an arc-discharge method at controlled temperatures
Author(s) -
Zhao Tingkai,
Yongning Liu
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3961
Subject(s) - materials science , carbon nanotube , electric arc , transmission electron microscopy , raman spectroscopy , anode , cathode , alloy , chemical engineering , carbon fibers , analytical chemistry (journal) , graphite , nanotechnology , composite material , electrode , composite number , optics , chromatography , chemistry , physics , engineering
Large amounts of single-wall carbon nanotubes(SWNTs) deposited on all the wall of the chamber have been obtained in helium and nitrogen mixed atmosphere using Co-Ni alloy catalyst with a modified arc furnace which can control the temperature during arcing process. Additionally, there are many weblike deposition products located between the cathode and anode. By twostep purification:the as-grown SWNT was heated in air at 500℃ for 30min, then soaked in 37% hydrochloric acid for 72h and filtered with deionized water. Microanalysis was carried out by Transmission electron microscopy(TEM), high-resolution TEM and Raman spectroscopy. The results obtained indicate that the purified SWNTs have high purity (higher than 95%) and uniform diameter (from 1.24 to 1.38nm).This experiment indicates that the temperature strongly affects the production of SWNT; the production and purity of SWNT increase with temperature. When the temperature is 600℃, the purity is about 70% and the production of SWNT is 12g/h.