Citation
Hussein, Mohd. Zobir and Latip, Suzanita and Sarijo, Siti Halimah and Zainal, Zulkarnain
(2011)
Surface properties transformation of multi-walled carbon nanotubes on reatment with various acids.
Research Journal of Chemistry and Environment, 15 (2 ).
pp. 438-444.
ISSN 0972-0626
Abstract
Multi-walled carbon nanotubes (MWCNTs) were treated with various acids namely nitric, citric, chromic and a mixture of nitric-sulphuric acids to introduce carboxylic acid functional groups on them. As a result of this treatment, carboxylic functional groups were found to exist as indicated by Fourier transformed infrared spectroscopy (FTIR) study. Breuneur-Emmet-Teller (BET) specific surface area of the resulting samples was found to be 98, 133, 167 and 247 m 3/g for the sample treated with a mixture of nitric and sulfuric, citric acid chromic acid and nitric acid respectively. Compared to the specific surface area of 1210 m 2/g for the starting MWCNTs, this is equivalent to percentage reduction of 91.8, 89.0, 86.2 and 79.6 % respectively. The crystallinity of the samples increased when nitric and a mixture of nitric and sulphuric acids were used for the treatment, but decreased when citric or chromic acid were used, as observed by X-ray diffraction (XRD) study. Except for the MWCNTs treated with nitric acid, diameter expansion was observed for all the samples.
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Additional Metadata
| Item Type: |
Article
|
| Divisions: |
Faculty of Science |
| Publisher: |
International Congress of Chemistry and Environment |
| Keywords: |
Surface Properties; Multi-Walled carbon nanotubes; Treatment; Acids; Functional group; Surface area; Surface modification.
|
| Depositing User: |
Nur Farahin Ramli
|
| Date Deposited: |
22 Aug 2013 02:49 |
| Last Modified: |
14 Sep 2015 00:57 |
| URI: |
http://psasir.upm.edu.my/id/eprint/24899 |
| Statistic Details: |
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