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Issue 13, 2017
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A simple modified electrode based on MIL-53(Fe) for the highly sensitive detection of hydrogen peroxide and nitrite

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Abstract

A modified matrix of an iron terephthalate metal–organic framework (MIL-53(Fe)), as a simple and efficient electroactive material for use as an electrochemical biosensor, was investigated. The morphology and structure of MIL-53(Fe) were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray powder diffraction (XRD). The electrochemical properties of the MIL-53(Fe) modified electrode were observed through cyclic voltammetry (CV) and chronoamperometry analysis. The modified electrode (MIL-53(Fe)/GCE) exhibited excellent electrocatalytic activity for the electrochemical reaction of hydrogen peroxide (H2O2) and nitrite (NO2). Under the optimized experimental conditions, wide linear ranges of 0.1–2000 μM for H2O2 and 0.4–7000 μM for NO2 were obtained, with corresponding detection limits of 0.075 μM and 0.36 μM (S/N = 3), respectively. In addition, the as-prepared electrode also showed excellent reproducibility and long-time stability. Finally, the electrochemical sensor was successfully applied in the analysis of disinfection water and tap water to detect H2O2 and NO2, respectively.

Graphical abstract: A simple modified electrode based on MIL-53(Fe) for the highly sensitive detection of hydrogen peroxide and nitrite

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Publication details

The article was received on 22 Nov 2016, accepted on 12 Mar 2017 and first published on 13 Mar 2017


Article type: Paper
DOI: 10.1039/C6AY03164A
Citation: Anal. Methods, 2017,9, 2082-2088
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    A simple modified electrode based on MIL-53(Fe) for the highly sensitive detection of hydrogen peroxide and nitrite

    D. Cheng, X. Li, Y. Qiu, Q. Chen, J. Zhou, Y. Yang, Z. Xie, P. Liu, W. Cai and C. Zhang, Anal. Methods, 2017, 9, 2082
    DOI: 10.1039/C6AY03164A

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