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Purification of Single‐Walled Carbon Nanotubes Using Acid Treatment and Magnetic Separation
Author(s) -
Gurova Olga A.,
Arhipov Vyacheslav E.,
Koroteev Viktor O.,
Guselnikova Tatiana Ya.,
Asanov Igor P.,
Sedelnikova Olga V.,
Okotrub Alexander V.
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800742
Subject(s) - carbon nanotube , materials science , x ray photoelectron spectroscopy , raman spectroscopy , yield (engineering) , nanoparticle , nitric acid , absorption (acoustics) , extraction (chemistry) , magnetic nanoparticles , magnetic separation , chemical engineering , characterization (materials science) , carbon fibers , nanotechnology , analytical chemistry (journal) , nuclear chemistry , chemistry , chromatography , composite material , metallurgy , composite number , physics , optics , engineering
A detailed analysis of TUBALL single‐walled carbon nanotubes (SWCNTs) after two‐step purification involving acid purification treatment with concentrated HCl, HNO 3 , H 2 SO 4 and solution of HNO 3 :H 2 SO 4 followed by magnetic processing is presented. The purity degree from iron higher than 99% is achieved, and the yield obtained by the above process is about 75 wt.%. Such high purity of the resultant sample is achieved by removing of the external iron nanoparticles by acid treatment and following extraction of nanotubes containing encapsulated nanoparticles under applied magnetic field. A comprehensive characterization of SWCNTs by Raman, optical absorption, and X‐ray photoelectron spectroscopies reveals purification‐induced changes in the integrity, composition, and electronic properties of SWCNT.