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Journal
2010 | 8 | 6 | 940-946
Article title

Effects of acid treatment duration and sulfuric acid molarity on purification of multi-walled carbon nanotubes

Content
Title variants
Languages of publication
EN
Abstracts
EN
Multi-walled carbon nanotubes were synthesized using a Fe-Ni bimetallic catalyst supported by MgO using thermal chemical vapor deposition. Purification processes to remove unwanted carbon structures and other metallic impurities were carried out by boiling in sulfuric acid solution. Various analytical techniques such as TGA/DSC, Raman spectroscopy, SEM, HRTEM and EDAX were employed to investigate the morphology, graphitization and quality of the carbon nanotubes. The obtained results reveal the molarity of sulfuric acid and immersed time of the carbon nanotubes in the acid solution is very effective at purifying multi-walled carbon nanotubes. It was also found that 5 M concentration of boiling sulfuric acid for a 3 h treatment duration led to the highest removal of the impurities with the least destructive effect. Moreover, it was observed that acid treatment results in decreasing of CNTs’ diameter.
Publisher
Journal
Year
Volume
8
Issue
6
Pages
940-946
Physical description
Dates
published
1 - 12 - 2010
online
5 - 9 - 2010
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-010-0017-9
Identifiers
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