16November2018

Nano-Micro Letters

A CuNi/C Nanosheet Array Based on a Metal-Organic Framework Derivate as a Supersensitive Non-Enzymatic Glucose Sensor

Li Zhang1, Chen Ye1, Xu Li2, Yaru Ding1, Hongbo Liang1, Guangyu Zhao1, Yan Wang1, ⁎

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Nano-Micro Lett. (2018) 10: 28

First Online: 23 November 2017 (Article)

DOI:10.1007/s40820-017-0178-9

*Corresponding author. E-mail: wangy_msn@hit.edu.cn

 

Abstract

 


Fig. 1 Schematic diagram of preparing CuNi/C electrodes

Bimetal catalysts are good alternatives for non-enzymatic glucose sensors owing to their low cost, high activity, good conductivity, and ease of fabrication. In the present study, a self-supported CuNi/C electrode prepared by electrodepositing Cu nanoparticles on a Ni based metal-organic framework (MOF) derivate was used as a non-enzymatic glucose sensor. The porous construction and carbon scaffold inherited from the Ni-MOF guarantee good kinetics of the electrode process in electrochemical glucose detection. Furthermore, Cu nanoparticles disturb the array structure of MOF derived films and evidently enhance their electrochemical performances in glucose detection. Electrochemical measurements indicate that the CuNi/C electrode possesses a high sensitivity of 17.12 mA mM−1 cm−2, a low detection limit of 66.67 nM, and a wider linearity range from 0.20 to 2.72 mM. Additionally, the electrode exhibits good reusability, reproducibility, and stability, thereby catering to the practical use of glucose sensors. Similar values of glucose concentrations in human blood serum samples are detected with our electrode and with the method involving glucose-6-phosphate dehydrogenase, the results further demonstrate the practical feasibility of our electrode.


 

Keywords

Non-enzymatic glucose sensor; Nanoparticle; Nanosheet array; Self-supported electrode; Copper-nickel bimetal catalyst

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