Purification of Single‐Walled Carbon Nanotubes Using Acid Treatment and Magnetic Separation

2019 ◽  
Vol 256 (9) ◽  
pp. 1800742 ◽  
Author(s):  
Olga A. Gurova ◽  
Vyacheslav E. Arhipov ◽  
Viktor O. Koroteev ◽  
Tatiana Ya. Guselnikova ◽  
Igor P. Asanov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Separation ◽  
Acid Treatment ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution

Carbon ◽  
2005 ◽  
Vol 43 (6) ◽  
pp. 1151-1155 ◽  
Author(s):  
J.G. Wiltshire ◽  
L.J. Li ◽  
A.N. Khlobystov ◽  
C.J. Padbury ◽  
G.A.D. Briggs ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Separation ◽  
Surfactant Solution ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Fe Catalyst ◽  
Aqueous Surfactant Solution ◽  
Walled Carbon Nanotubes

An Efficient Method to Completely Remove Catalyst Particles from HiPCO Single Walled Carbon Nanotubes

2018 ◽  
Vol 53 ◽  
pp. 64-75 ◽  
Author(s):  
M. Anto Godwin ◽  
Aparna Basavaraja Allannavar ◽  
Sarika Joshi ◽  
Gadhadar Reddy ◽  
S.S. Abhishek ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Acid Treatment ◽  
Catalyst Particle ◽  
Single Walled Carbon Nanotubes ◽  
Easy Method ◽  
Single Walled Carbon ◽  
Carbon Impurities ◽  
Transmission Electron ◽  
Treated Sample ◽  
Walled Carbon Nanotubes

An efficient, economic and easy method for removing 99% of catalyst particle from high pressure carbon monoxide (HiPCO) single walled carbon nanotubes (SWCNT) is reported. The experiment is carried out at low temperature followed by acid treatment. The process exploited here is oxidation of the carbon impurities to gaseous phase as CO2and removal of oxidized catalyst debris using acid treatment. Stability of SWCNT at these temperatures does not allow any damage to the nanotubes, however, some damage is observed which can be attributed to the oxidation of catalyst particles and their removal. The purified sample showed very less/no amount of amorphous carbon and catalyst impurities. Characterization of the material was carried out using Raman spectroscopy, Thermogravimetric analysis (TGA), Scanning electron microscopy (SEM), Transmission electron microscope (TEM) and Energy Dispersive Spectroscopy (EDAX). The resultant SWCNT were found to be highly pure. EDAX spectroscopy showed that the purified sample had only 0.5wt% of catalyst impurities whereas the as prepared once have 9.09wt%, also, TGA curve of the treated sample showed a very significant increase in the oxidation temperature indicating less defect and less catalyst content in the sample. The non- carbonaceous residue after purification is about 0.3%. highly efficient purification of SWCNT using the proposed method. This work provides a basis on removing the catalyst particles completely.

The Effects of Acid Treatment Methods on the Diameter Dependent Fracture of Single Walled Carbon Nanotubes

2007 ◽  
Vol 120 ◽  
pp. 281-284
Author(s):  
Seung Hyun Baik ◽  
Young Jin Kim ◽  
Dock Jin Lee ◽  
Jae Boong Choi
Keyword(s):  
Carbon Nanotubes ◽  
Gel Electrophoresis ◽  
Acid Treatment ◽  
Small Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Spectroscopic Techniques ◽  
Treatment Methods ◽  
Raman Spectroscopic ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The effects of acid treatment methods on the fracture of single walled carbon nanotubes are investigated using gel electrophoresis and Raman spectroscopic techniques. The mechanism of gel electrophoresis is based on the migration of charged particles in an electric field, and the gel matrix acts as a sieve for the analyte. A comparative Raman spectroscopy analysis, performed on the migrated nanotubes in the gel, shows that small diameter tubes are cut shorter by the acid treatments.

Enrichment of Large-Diameter Single-Walled Carbon Nanotubes by Oxidative Acid Treatment

2002 ◽  
Vol 106 (29) ◽  
pp. 7160-7162 ◽  
Author(s):  
Yanlian Yang ◽  
Hongling Zou ◽  
Bin Wu ◽  
Qingwen Li ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Acid Treatment ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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