Electrochemical Non-Enzymatic Glucose Sensor based on Hexagonal Boron Nitride with Metal–Organic Framework Composite
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In this study, an amperometric non-enzymatic glucose sensor was developed on the surface of a glassy carbon electrode by simply drop-casting the synthesized homogeneous suspension of hexagonal boron nitride (h-BN) nanosheets with a cop-per metal−organic framework (Cu-MOF) composite. Comprehensive analytical methods, including field-emission scanningelectron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), cyclic vol- tammetry, electrochemical impedance spectroscopy, and amperometry, were used to investigate the surface and elec-trochemical characteristics of the h-BN–Cu-MOF composite. The FE-SEM, FT-IR, and XRD results showed that the h-BN–Cu-MOF composite was formed successfully and exhibited a good porous structure. The electrochemical results showed a sensor sensitivity of 18.1 µAµM 1cm 2 with a dynamic linearity range of 10−900 µM glucose and a detection limit of 5.5 µM glucose with a rapid turnaround time (less than 2 min). Additionally, the developed sensor exhibited satisfactory anti- interference ability against dopamine, ascorbic acid, uric acid, urea, and nitrate, and thus, can be applied to the design and development of non-enzymatic glucose sensors.
Abstract
In this study, an amperometric non-enzymatic glucose sensor was developed on the surface of a glassy carbon electrode by simply drop-casting the synthesized homogeneous suspension of hexagonal boron nitride (h-BN) nanosheets with a cop-per metal−organic framework (Cu-MOF) composite. Comprehensive analytical methods, including field-emission scanningelectron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), cyclic vol- tammetry, electrochemical impedance spectroscopy, and amperometry, were used to investigate the surface and elec-trochemical characteristics of the h-BN–Cu-MOF composite. The FE-SEM, FT-IR, and XRD results showed that the h-BN–Cu-MOF composite was formed successfully and exhibited a good porous structure. The electrochemical results showed a sensor sensitivity of 18.1 µAµM 1cm 2 with a dynamic linearity range of 10−900 µM glucose and a detection limit of 5.5 µM glucose with a rapid turnaround time (less than 2 min). Additionally, the developed sensor exhibited satisfactory anti- interference ability against dopamine, ascorbic acid, uric acid, urea, and nitrate, and thus, can be applied to the design and development of non-enzymatic glucose sensors.
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