Journal
TALANTA
Volume 185, Issue -, Pages 335-343Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.03.097
Keywords
NiCo2O4 nanorods; Deep eutectic solvents; Cyclic voltammetry; Glucose electrooxidation; Amperometric responses
Categories
Funding
- National Natural Science Foundation of China [21572239, 21505145]
- Funds for Distinguished Young Scientists of Gansu [1210RJDA013]
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A novel reduced graphene oxide supported nickel cobaltate nanorods composite (RGO-NiCo2O4) was prepared by a simple ionothermal method in deep eutectic solvents for the first time. Electrochemical results demonstrated that the obtained nanocomposite modified glassy carbon electrode exhibited excellent electrocatalytic performance towards the oxidation of glucose with a wide double-linear range from 1 mu M to 25 mM and a low detection limit of 0.35 mu M (S/N = 3). NiCo2O4 nanorods with many small interconnected nanoparticles provided many electrocatalytic active sites, while RGO with large surface area offered good electrical conductivity. The synergistic effect between NiCo2O4 nanorods and RGO contributed to the enhanced sensing ability of the hybrid nanostructure. This sensitive glucose sensor can be also used for the practical detection of glucose in human serum.
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