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    Electrochemical Conversion of Copper-Based Hierarchical Micro/ Nanostructures to Copper Metal Nanoparticles and Their Testing in Nitrate Sensing


    Andreoli, Enrico and Annibaldi, Valeria and Rooney, A. Denise and Liao, Kang-Shyang and Alley, Nigel J. and Curran, Seamus A. and Breslin, Carmel B. (2011) Electrochemical Conversion of Copper-Based Hierarchical Micro/ Nanostructures to Copper Metal Nanoparticles and Their Testing in Nitrate Sensing. Electroanalysis, 23 (9). pp. 2164-2173. ISSN 1040-0397

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    Abstract

    Metallic copper nanoparticles (CuNP) are formed from the reduction of hierarchical copper-based micro/nanostructures previously electrodeposited on polypyrrole-polystyrene sulfonate (PPy-PSS) thin films. The application of a high reduction potential causes the erosion of the micro/nanostructures nanosheets and the formation of CuNP. The CuNP are used in a series of preliminary tests in order to assess their performance in the sensing of nitrate. The sensing performance is improved with the introduction of polyethyleneimine-functionalized multiwall carbon nanotubes (MWNT-PEI) to the PPy-PSS films. Electrochemical impedance spectroscopy studies show that the nanotubes increased the electronic conductivity of the reduced films. The limit of detection of the PPy-PSS-MWNT-PEI-CuNP nanocomposite is 30 mM nitrate. The materials need further development and optimization work in order to be applied as sensors.

    Item Type: Article
    Keywords: Polypyrrole; Copper nanoparticles; Multiwall carbon nanotubes; Nitrate sensing;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 7912
    Identification Number: https://doi.org/10.1002/elan.201100105
    Depositing User: Dr. Carmel Breslin
    Date Deposited: 14 Feb 2017 12:37
    Journal or Publication Title: Electroanalysis
    Publisher: Wiley
    Refereed: Yes
    Funders: Environmental Protection Agency (EPA), Science Foundation Ireland (SFI)
    URI:

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