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Nickel–cobalt double hydroxide nanosheets wrapped amorphous Ni(OH)2 nanoboxes: development of dopamine sensor with enhanced electrochemical properties

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Abstract

Nickel–cobalt layered double hydroxides (NiCo-LDHs) were synthesized using a facile hydrothermal method and then wrapped around amorphous Ni(OH)2 nanoboxes with intact shell structures. The morphology and shape of the Ni(OH)2/NiCo-LDHs nanocomposites were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of the Ni(OH)2/NiCo nanocomposites modified electrode towards dopamine. With a potential of 0.22 V, the Ni(OH)2/NiCo-LDHs modified electrode was used to determine dopamine by amperometry, showing a significant current response and a linear dependence (R = 0.9997) in the concentration up to 1.08 mM with a sensitivity of 83.48 μA mM−1 cm−2 and a low detection limit of 17 nM (signal-to-noise ratio of 3). In particular, the fabricated dopamine sensor showed excellent reproducibility, long-term stability and favorable anti-interference.

Graphical abstract: Nickel–cobalt double hydroxide nanosheets wrapped amorphous Ni(OH)2 nanoboxes: development of dopamine sensor with enhanced electrochemical properties

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Publication details

The article was received on 27 May 2017, accepted on 24 Sep 2017 and first published on 25 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ01835E
Citation: New J. Chem., 2017, Advance Article
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    Nickel–cobalt double hydroxide nanosheets wrapped amorphous Ni(OH)2 nanoboxes: development of dopamine sensor with enhanced electrochemical properties

    S. Zhang, Y. Fu, Q. Sheng and J. Zheng, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ01835E

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