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Electrospun CuO/NiO composite nanofibers for sensitive and selective non-enzymatic nitrite sensors

Abstract

The non-enzymatic electrochemical sensor based on the use of nanofibrous CuO/NiO as a catalytic probe is developed for the effectual sensing of nitrite. The one dimensional and strongly interconnected nanofibers with the uniformly developed ultrafine nanograins are observed for CuO/NiO composite nanofibers. The monoclinic crystalline structure of CuO nanofibers are preserved even after the composite formation with NiO. The electrocatalytic activity of prepared CuO/NiO nanofibers toward nitrite oxidation is investigated under the neutral conditions. Being utilized as a potent non-enzymatic sensor, CuO/NiO nanofibers demonstrate the excellent amperometric performances including a lower sensing limit, soaring sensitivity, and broad linear array, respectively, of 0.5 μM, 282.72 µA mM-1cm-2, and 0.001 - 5 mM. Furthermore, the remarkable selectivity and stability achieved for the as-fabricated sensors endorse its real sample analysis with human serum. Thus these findings outperforms the hurdles of existing non-enzymatic nitrite sensor probes and opens up the new possibilities in exploring an efficient and economical approach toward the development of electrochemical probes for nitrite detection.

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Publication details

The article was received on 09 Jun 2017, accepted on 03 Oct 2017 and first published on 06 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02073B
Citation: New J. Chem., 2017, Accepted Manuscript
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    Electrospun CuO/NiO composite nanofibers for sensitive and selective non-enzymatic nitrite sensors

    J. Saravanan, R. Ramasamy, H. Therese, A. G and G. K. George, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02073B

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