Facile synthesis of MnO2/carbon nanotubes decorated with a nanocomposite of Pt nanoparticles as a new platform for the electrochemical detection of catechin in red wine and green tea samples

A. T. Ezhil Vilian, Rajesh Madhu, Shen Ming Chen, Vediyappan Veeramani, Mani Sivakumar, Yun Suk Huh, Young Kyu Han

    Research output: Contribution to journalArticlepeer-review

    42 Scopus citations

    Abstract

    Herein, we report a simple and facile synthesis strategy of MnO2/carbon nanotubes decorated with a nanocomposite of Pt nanoparticles using a simple electrodeposition method. The Pt/MnO2/f-MWCNT modified electrode were characterized by several analytical and spectroscopy techniques and were adopted as a composite for a novel catechin sensor. The as-prepared Pt/MnO2/f-MWCNT modified glassy carbon electrode (GCE) exhibited a smaller peak potential separation (ΔEp), and electron transfer kinetics during the oxidation reaction of catechin. This can be attributed to the larger effective surface area, greater porosity, and more reactive sites on the Pt/MnO2/f-MWCNT-modified GCE. Notably, we achieved a very low detection limit (under optimized conditions) of catechin ca. 0.02 μM (S/N = 3); the linear range is 2-950 μM with excellent sensitivity. The real time application of catechin in red wine, black tea, and green tea samples with excellent performance. The proposed sensor was successfully developed and the advantages of low cost, ease of preparation, long-term stability, and good reproducibility were demonstrated which are superior to recently reported modified electrodes, thereby enabling practical industrial applications.

    Original languageBritish English
    Pages (from-to)6285-6292
    Number of pages8
    JournalJournal of Materials Chemistry B
    Volume3
    Issue number30
    DOIs
    StatePublished - 14 Aug 2015

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