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Nanomaterials 2016, 6(10), 177; doi:10.3390/nano6100177

Ionic Adsorption and Desorption of CNT Nanoropes

1
Department of Engineering Mechanics, Beijing University of Technology, Beijing 100124, China
2
Department of Civil and Architectural Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Thomas Nann
Received: 20 July 2016 / Revised: 16 September 2016 / Accepted: 22 September 2016 / Published: 28 September 2016
(This article belongs to the Special Issue Nanomechanics of Carbon Nanotubes and Graphene Sheets)
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Abstract

A nanorope is comprised of several carbon nanotubes (CNTs) with different chiralities. A molecular dynamic model is built to investigate the ionic adsorption and desorption of the CNT nanoropes. The charge distribution on the nanorope is obtained by using a modified gradient method based on classical electrostatic theory. The electrostatic interactions among charged carbon atoms are calculated by using the Coulomb law. It was found here that the charged nanorope can adsorb heavy metal ions, and the adsorption and desorption can be realized by controlling the strength of applied electric field. The distance between the ions and the nanorope as well as the amount of ions have an effect on the adsorption capacity of the nanorope. The desorption process takes less time than that of adsorption. The study indicates that the CNT nanorope can be used as a core element of devices for sewage treatment. View Full-Text
Keywords: nanorope; adsorption and desorption of ions; carbon nanotubes nanorope; adsorption and desorption of ions; carbon nanotubes
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MDPI and ACS Style

Shang, J.-J.; Yang, Q.-S.; Yan, X.-H.; He, X.-Q.; Liew, K.-M. Ionic Adsorption and Desorption of CNT Nanoropes. Nanomaterials 2016, 6, 177.

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