Electrochemical Investigation of Adsorption of Single Wall Carbon Nanotubes at Liquid/Liquid Interface

Aminu Rabiu, Peter Toth, Andrew Rodgers, Robert Dryfe

    Research output: Contribution to journalArticlepeer-review

    Abstract

    There is much interest in understanding the interfacial properties of carbon nanotubes, particularly at water/oil interfaces. Here, the adsorption of single-wall carbon nanotubes (SWCNTs) at the water/1,2-dichloroethane (DCE) interface, and the subsequent investigation of the influence of the adsorbed nanotube layer on interfacial ion transfer, is studied by using the voltammetric transfer of tetramethylammonium (TMA+) and hexafluorophosphate (PF6) as probe ions. The presence of the interfacial SWCNT layer significantly suppresses the transfer of both ions across the interface, with a greater degree of selectivity towards the PF6− ion. This effect was attributed both to the partial blocking of the interface by the SWCNTs and to the potential dependant adsorption of background electrolyte ions on the surface of the SWCNTs, as confirmed by X-ray photoelectron spectroscopy, which is caused by an electrostatic interaction between the interfacial SWCNTs and the transferring ion.
    Original languageEnglish
    Pages (from-to)57-63
    Number of pages7
    JournalChemistryOpen
    Volume6
    Issue number1
    Early online date13 Dec 2016
    DOIs
    Publication statusPublished - 2 Feb 2017

    Fingerprint

    Dive into the research topics of 'Electrochemical Investigation of Adsorption of Single Wall Carbon Nanotubes at Liquid/Liquid Interface'. Together they form a unique fingerprint.

    Cite this