Hierarchical core-shell structured NiS/NiMoO nanowires: a high-performance and reusable electrochemical sensor for glucose detection
Designing highly active electrode is important for the fabrication of electrochemical sensing platforms, and core-shell nanostructures with large specific surface areas and ease of accessibility are effective probes for the detection of biomolecules. In this work, we report the development of hierar...
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Published in | Analyst (London) Vol. 144; no. 16; pp. 4925 - 4934 |
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Main Authors | , , , , , , |
Format | Journal Article |
Published |
05.08.2019
|
Online Access | Get full text |
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Summary: | Designing highly active electrode is important for the fabrication of electrochemical sensing platforms, and core-shell nanostructures with large specific surface areas and ease of accessibility are effective probes for the detection of biomolecules. In this work, we report the development of hierarchical core-shell Ni
3
S
2
/NiMoO
4
nanowires on a nickel foam substrate (Ni-Ni
3
S
2
/NiMoO
4
) as a non-noble metal catalyst electrode for the electrochemical oxidation of glucose in alkaline electrolyte. As an electrochemical sensor for glucose detection, the fabricated hierarchical Ni-Ni
3
S
2
/NiMoO
4
core-shell nanowires display an enhanced catalytic response, a fast response time of 1 s with a limit of detection (LOD) of 0.055 μM (S/N = 3), and a higher sensitivity of 10.49 μA μM
−1
cm
−2
. Unlike Ni
3
S
2
or NiMoO
4
electrodes, the observed superior catalytic activity towards glucose is mainly due to the promotional effect of NiMoO
4
nanosheets on the Ni
3
S
2
nanowires, which can increase the large active surface area and generate numerous active sites within and on the surface walls of the nanowire structures. The developed Ni-Ni
3
S
2
/NiMoO
4
nanowire electrode can selectively detect glucose in the presence of other carbohydrates, such as fructose, sucrose, lactose, maltose, galactose, mannose, and xylose, indicating potential anti-interference properties. The Ni-Ni
3
S
2
/NiMoO
4
nanowire electrode is highly stable for reuse and its practical application is demonstrated using real blood serum samples. These results demonstrate that hierarchical core-shell Ni
3
S
2
/NiMoO
4
nanowires show potential for application in the development of low-cost applied glucose sensors.
The electro-oxidation of glucose occurred at the surface of hierarchical core-shell Ni
3
S
2
/NiMoO
4
nanowires. |
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Bibliography: | 10.1039/c9an00917e Electronic supplementary information (ESI) available. See DOI |
ISSN: | 0003-2654 1364-5528 |
DOI: | 10.1039/c9an00917e |