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Issue 4, 2018
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Facile preparation of Prussian blue/polypyrrole hybrid nanofibers as robust peroxidase mimics for colorimetric detection of L-cysteine

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Abstract

A facile and sensitive detection of L-cysteine is essential for biosensors, environmental monitoring and medical diagnosis. In this study, a simple approach has been demonstrated to prepare Prussian blue (PB)/polypyrrole (PPy) hybrid nanofibers as efficient peroxidase-like mimics for the determination of L-cysteine. α-Fe2O3 nanofibers act as both templates and a source of Fe3+ to polymerize pyrrole in an acidic environment, resulting in the formation of PB/PPy hybrid nanofibers. The as-prepared PB/PPy hybrid nanofibers show a superior catalytic activity as peroxidase mimics over α-Fe2O3 nanofibers. Due to the high catalytic efficiency of the resultant PB/PPy hybrid nanofibers, we have developed a simple colorimetric approach for the rapid and sensitive determination of L-cysteine with a detection limit of about 16 nM over a wide linear range from 1 to 20 μM. In addition, the detection system displays a high selectivity toward L-cysteine over other amino acids, glucose, and common ions. This work provides a new strategy for the preparation of peroxidase-like nanomaterials with improved catalytic activity, which shows great promise for application in highly sensitive detection.

Graphical abstract: Facile preparation of Prussian blue/polypyrrole hybrid nanofibers as robust peroxidase mimics for colorimetric detection of l-cysteine

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Publication details

The article was received on 09 Dec 2017, accepted on 30 Jan 2018 and first published on 30 Jan 2018


Article type: Research Article
DOI: 10.1039/C7QM00571G
Citation: Mater. Chem. Front., 2018,2, 768-774
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    Facile preparation of Prussian blue/polypyrrole hybrid nanofibers as robust peroxidase mimics for colorimetric detection of L-cysteine

    N. Song, Y. Zhu, F. Ma, C. Wang and X. Lu, Mater. Chem. Front., 2018, 2, 768
    DOI: 10.1039/C7QM00571G

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