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    Electrocatalytic Nitrite Determination Using Iron Phthalocyanine Modified Gold Nanoparticles


    Saeed, Ayman Ali and Singh, Baljit and Abbas, Mohammed Nooredeen and Issa, Yousry Moustafa and Dempsey, Eithne (2015) Electrocatalytic Nitrite Determination Using Iron Phthalocyanine Modified Gold Nanoparticles. Electroanalysis, 27 (5). pp. 1086-1096. ISSN 1040-0397

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    Abstract

    lectrochemical detection of nitrite was achieved via electrodeposition of gold nanoparticles (AuNPs) onto glassy carbon electrodes, followed by 3‐mercaptopropionic acid (MPA) self‐assembly, enabling attachment of an iron(III) monoamino‐phthalocyanine (FeMAPc) catalyst via amide bond formation. The use of scanning electron microscopy, energy dispersive X‐ray spectroscopy and ultraviolet‐visible spectroscopy realised surface characterisation while cyclic voltammetry and electrochemical impedance spectroscopy techniques were applied for electrochemical interrogation. The electrochemical behaviour of nitrite at the bare (GCE), AuNPs/GCE, FeMAPc/GCE and FeMAPc‐MPA/AuNPs/GCE was further scrutinised using differential pulse voltammetry in phosphate buffer solution (0.1 M PBS, pH 5.8). Overall the FeMAPc‐MPA/AuNPs/GCE resulted in sensitivity 14.5 nA/µM, which was double that of AuNPs/GCE, 2.4 times FeMAPc/GCE and 3.5 times the response at a bare GCE, with linear range 1.9 µM–2.04 mM (PBS, pH 5.8) and LOD 0.21 µM. An interference study revealed that the proposed sensor (FeMAPc‐MPA/AuNPs/GCE) exhibited a selective response in the presence of interfering anions and the analytical capability of the sensor was demonstrated via nitrite ion determination in real water samples.

    Item Type: Article
    Keywords: Nanoparticles; Nitrite detection; Iron phthalocyanine; Self‐assembled monolayer;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 12527
    Identification Number: https://doi.org/10.1002/elan.201400563
    Depositing User: Eithne Dempsey
    Date Deposited: 05 Mar 2020 16:58
    Journal or Publication Title: Electroanalysis
    Publisher: Wiley
    Refereed: Yes
    URI:

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