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In relation to this article, we declare that there is no conflict of interest.
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Received June 28, 2015
Accepted January 3, 2016
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Facile route to multi-walled carbon nanotubes under ambient conditions

School of Applied Chemical Engineering, Kyungpook National University, Daegu 41566, Korea
shjeong@knu.ac.kr
Korean Journal of Chemical Engineering, February 2016, 33(2), 401-404(4), 10.1007/s11814-016-0004-y
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Abstract

A facile and practical route is demonstrated to prepare multi-walled carbon nanotubes (MWCNTs) by a sonochemical method. By applying ultrasonic irradiation to the mixture of ferrocene and xylene with small amount of water, crystalline MWCNTs were selectively synthesized under ambient conditions, allowing MWCNTs with diameter of 25-40 nm to be obtained. A control experiment revealed that a small amount of water was essential for producing MWCNTs. The analysis of Raman spectra of MWCNTs showed that the intensity of the D-band relative to the G-band was 0.98, indicating relatively good crystallinity of these MWCNTs. This result was consistent with that of TEM observation.

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