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A carbon nanofibers–Sm2O3 nanocomposite: a novel electrochemical platform for simultaneously detecting two isomers of dihydroxybenzene

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Abstract

In this report, a CNFs-Sm2O3 nanocomposite modified glassy carbon electrode (CNFs-Sm2O3/GCE), comprising CNFs with a large specific surface area and Sm2O3 with excellent catalytic activity, is prepared as a novel sensor for simultaneously detecting hydroquinone (HQ) and catechol (CC) in an aqueous environment. The surface characteristics and electrochemical performance of the as-prepared sensor were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and electrochemical approaches. The electrochemical results show the well-defined redox peaks of HQ and CC, and the potential difference of the peak-to-peak separation between HQ and CC is about 111 mV, as determined by both cyclic voltammetric (CV) and differential pulse voltammetric (DPV) techniques, which indicate that the modified electrodes can simultaneously determine HQ and CC without any separation step. The current of the anodic peak response of the CNFs-Sm2O3/GCE displays a linear dependence on the concentration of HQ and CC in the range of 1–500 μM, and the detection limits for HQ and CC are 0.09 and 0.07 μM, respectively. Moreover, the CNF-Sm2O3/GCE possesses excellent selectivity, reproducibility and stability in determining the concentration of the isomers of dihydroxybenzene. Therefore, this new type of electrode is promising as a sensor for simultaneous determination of HQ and CC in an aqueous environment.

Graphical abstract: A carbon nanofibers–Sm2O3 nanocomposite: a novel electrochemical platform for simultaneously detecting two isomers of dihydroxybenzene

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Publication details

The article was received on 28 Dec 2017, accepted on 11 Mar 2018 and first published on 14 Mar 2018


Article type: Paper
DOI: 10.1039/C7AY02981K
Citation: Anal. Methods, 2018, Advance Article
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    A carbon nanofibers–Sm2O3 nanocomposite: a novel electrochemical platform for simultaneously detecting two isomers of dihydroxybenzene

    J. He, F. Qiu, Q. Xu, J. An and R. Qiu, Anal. Methods, 2018, Advance Article , DOI: 10.1039/C7AY02981K

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