Abstract
The exploration of substrate materials to construct electrochemical biosensors for glucose monitoring in the field of clinical diagnosis, especially for diabetes is still being investigated extensively. In this paper, NiO/Fe2O3 nanocomposites are designed and synthesized by two-step hydrothermal approach in combination with calcinations. The morphology and microstructure are studied by SEM, XRD, XPS, and TEM systematically. Optimized NiO/Fe2O3 nanocomposites are employed as substrate to construct glucose biosensors, and the electrochemical properties are carried out by cyclic voltammetric and chronoamperometric techniques. The results indicate as-prepared biosensors achieve a high sensitivity of 230.5 μA cm−2 mM−1, wide linear range between 50 and 2867 μM, and low detection limit of 3.9 μM towards glucose detection. The synergistic effect between NiO and Fe2O3 as substrate to construct glucose biosensors is elucidated. The selectivity is acceptable based on the detection of glucose concentration for diabetics.
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Funding
This work is financially supported by the National Natural Science Foundation of China (Nos. 51402081, 51502071 and 51272063) and AVIC Institute of Fundamental Technology Innovation Fund (Grant No. JCY2015A001). Dr. Jiewu Cui is grateful to the financial support from the Fundamental Research Funds for the Central Universities (No. JZ2016HGTB0719 and JZ2017HGTB0203).
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Luo, L., Cui, J., Wang, Y. et al. Synthesis of NiO/Fe2O3 nanocomposites as substrate for the construction of electrochemical biosensors. J Solid State Electrochem 22, 1763–1770 (2018). https://doi.org/10.1007/s10008-018-3882-6
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DOI: https://doi.org/10.1007/s10008-018-3882-6