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  • A SERS spectroelectrochemical investigation of the interaction of butylethoxycarbonylthiourea with copper surfaces

    Author(s)
    Hope, GA
    Woods, R
    Boyd, SE
    Watling, K
    Griffith University Author(s)
    Hope, Greg A.
    Year published
    2004
    Metadata
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    Abstract
    The interaction of the sulfide mineral flotation collector, n-butylethoxycarbonylthiourea (BECTU), with copper surfaces at pH 9.2 has been investigated by voltammetry and Raman scattering spectroscopy, NMR, Raman and FTIR spectroscopies have been applied to characterise BECTU and its copper(I) compound to provide a basis for interpreting the spectroelectrochemical data. In the copper compound, the organic molecule is bonded to metal atoms through both its sulfur atom and the nitrogen of the NHCO group of BECTU with the release of the proton. Voltammetry showed that the copper compound is formed above approximately -0.4 V and ...
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    The interaction of the sulfide mineral flotation collector, n-butylethoxycarbonylthiourea (BECTU), with copper surfaces at pH 9.2 has been investigated by voltammetry and Raman scattering spectroscopy, NMR, Raman and FTIR spectroscopies have been applied to characterise BECTU and its copper(I) compound to provide a basis for interpreting the spectroelectrochemical data. In the copper compound, the organic molecule is bonded to metal atoms through both its sulfur atom and the nitrogen of the NHCO group of BECTU with the release of the proton. Voltammetry showed that the copper compound is formed above approximately -0.4 V and its presence on the surface inhibits oxide formation. Surface enhanced Raman scattering (SERS) spectra from copper electrodes in the presence of BECTU showed that the major surface species was the copper compound at potentials more than or equal to -0.4 V. The SERS spectrum at approximately -0.5 V was significantly different to that observed from for the bulk compound. This spectrum is interpreted in terms of charge transfer chemisorption of BECTU onto copper atoms in the metal surface.
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    Journal Title
    Colloids and Surfaces A: Physicochemical and Engineering Aspects
    Volume
    232
    Publisher URI
    http://www.elsevier.com/wps/find/journaldescription.cws_home/500844/description#description
    DOI
    https://doi.org/10.1016/j.colsurfa.2003.10.011
    Copyright Statement
    © 2004 Elsevier : Reproduced in accordance with the copyright policy of the publisher : This journal is available online - use hypertext links.
    Subject
    Physical sciences
    Chemical sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/5709
    Collection
    • Journal articles

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