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Building selective electrochemical sensing solid-liquid interface for fluoride ion in water with bis(indolyl)methane-functionalized multi-walled carbon nanotubes

Abstract

Based on the fluoride ion recognition ability of nitro-substituted 3,3’-bis(indolyl)methane (Nbim), and the unique properties of multi-walled carbon nanotubes (MWCNTs) with enlarged active surface area and high electrical conductivity, a new solid-liquid interface for selective detection of fluoride ion in water was fabricated by Nbim/MWCNTs-modified glassy carbon electrode. In order to transform molecular interactions happened on solid liquid interface into measurable signals, electrochemical techniques were used through the electron transfer mediator of K3Fe(CN)6. Due to the synergistic effect of Nbim and MWCNTs, the as-prepared electrochemical sensing interface can be applied for the selective voltammetric determination of non-electroactive analyte (F−) making use of the changes in peak currents of ferricyanide/ferrocyanide couple. The response current was linear with F− concentration in the range from 1 μM to 130 μM, with a detection limitation of 0.1 μM. This work offers a new attempt to detect F− by solid interface in practical water samples.

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Publication details

The article was received on 29 Jul 2017, accepted on 10 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02794J
Citation: New J. Chem., 2017, Accepted Manuscript
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    Building selective electrochemical sensing solid-liquid interface for fluoride ion in water with bis(indolyl)methane-functionalized multi-walled carbon nanotubes

    Y. ni, H. Liu, J. Xu, Y. Yue and S. Shao, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02794J

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