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Issue 8, 2017
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One-pot electrochemical preparation of copper species immobilized poly(o-aminophenol)/MWCNT composite with excellent electrocatalytic activity for use as an H2O2 sensor

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Abstract

Redox activity of copper species immobilized poly(o-aminophenol)/multi-walled carbon nanotube (Cu@MWCNT-POAP) composite is reported for direct electrocatalysis towards detection of H2O2. The Cu@MWCNT-POAP composite was prepared by a single step in situ electrochemical method. The as-prepared Cu@MWCNT-POAP composites were characterized by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, and electrochemical impedance spectroscopy. Cyclic voltammetry (CV) studies highlighted the good redox behavior of the Cu@MWCNT-POAP composite resulting from direct electron transfer behavior of the copper redox couple (Cu2+/Cu+). The Cu@MWCNT-POAP composite displayed superior electrocatalytic activity and high performance towards detection of H2O2 because of its large surface area and homogenous immobilization of Cu species on the MWCNT-POAP composite. The analytical sensitivity and detection limit of the sensor were 831 μA mM−1 cm−2 and 30 nM, respectively. In addition, bio-catalytic activity of the sensor was evaluated using the Michaelis–Menten constant. The Cu@MWCNT-POAP composite showed excellent stability and reproducibility, and good recoveries for determination of H2O2 in milk, bleach cream, and contact lens solutions.

Graphical abstract: One-pot electrochemical preparation of copper species immobilized poly(o-aminophenol)/MWCNT composite with excellent electrocatalytic activity for use as an H2O2 sensor

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Publication details

The article was received on 12 May 2017, accepted on 03 Jul 2017 and first published on 04 Jul 2017


Article type: Research Article
DOI: 10.1039/C7QI00259A
Citation: Inorg. Chem. Front., 2017,4, 1356-1364
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    One-pot electrochemical preparation of copper species immobilized poly(o-aminophenol)/MWCNT composite with excellent electrocatalytic activity for use as an H2O2 sensor

    P. Barathi, B. Thirumalraj, S. Chen and A. Subramania, Inorg. Chem. Front., 2017, 4, 1356
    DOI: 10.1039/C7QI00259A

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