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Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Stability of multi-walled carbon nanotubes in commonly used acidic media

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Title
Stability of multi-walled carbon nanotubes in commonly used acidic media
Author
Shin, Yeon RanJeon, In-YupBaek, Jong-Beom
Keywords
Acid strengths; Acidic media; Characterization techniques; Oxidative damage; Oxygen content; Strongest acid; Trifluoromethane sulfonic acid
Issue Date
201204
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.50, no.4, pp.1465 - 1476
Abstract
Multi-walled carbon nanotubes (MWCNT) were treated in five commonly used acidic media with different pK(a) values. The stability of the MWCNT was evaluated by using various characterization techniques. The results indicated that oxidative damage of MWCNT was not closely related to acid strength, and that the MWCNT was more sensitive to the oxidizing nature of the acid. As a result, the MWCNT treated with the strongest acid, trifluoromethanesulfonic acid (pK(a) = -15.9), only reached oxygen content of 1.8%, while nitric acid (pK(a) = -1.5)/sulfuric acid (pK(a) = -3.0) treated MWCNT showed oxygen content as high as 19% after 24 h treatment. The remaining acidic media did not noticeably increase the oxygen content of the MWCNT up to 24 h treatment.
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DOI
http://dx.doi.org/10.1016/j.carbon.2011.11.017
ISSN
0008-6223
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