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A Novel Non-Enzymatic Electrochemical Hydrogen Peroxide Sensor Based on a Metal-Organic Framework/Carbon Nanofiber Composite

1,2, 1,2, 1,2, 1,2, 3,* and 1,2,*
1
College of Textile and Clothing, Nantong University, Nantong 226019, China
2
National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Protection, Nantong 226019, China
3
Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou 350108, China
*
Authors to whom correspondence should be addressed.
Molecules 2018, 23(10), 2552; https://doi.org/10.3390/molecules23102552
Received: 31 August 2018 / Revised: 22 September 2018 / Accepted: 2 October 2018 / Published: 6 October 2018
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Abstract

A co-based porous metal-organic framework (MOF) of zeolitic imidazolate framework-67 (ZIF-67) and carbon nanofibers (CNFs) was utilized to prepare a ZIF-67/CNFs composite via a one-pot synthesis method. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) were employed to investigate the morphology, structure, and composition of the resulting composite. A novel high-performance non-enzymatic electrochemical sensor was constructed based on the ZIF-67/CNFs composite. The ZIF-67/CNFs based sensor exhibited enhanced electrocatalytic activity towards H2O2 compared to a pure ZIF-67-based sensor, due to the synergistic effects of ZIF-67 and CNFs. Meanwhile, chronoamperometry was utilized to explore the detection performance of the sensor. Results showed the sensor displayed high-efficiency electrocatalysis towards H2O2 with a detection limit of 0.62 μM (S/N = 3), a sensitivity of 323 µA mM−1 cm−2, a linear range from 0.0025 to 0.19 mM, as well as satisfactory selectivity and long-term stability. Furthermore, the sensor demonstrated its application potential in the detection of H2O2 in food. View Full-Text
Keywords: metal-organic framework; ZIF-67; non-enzymatic sensor; carbon nanofiber; hydrogen peroxide metal-organic framework; ZIF-67; non-enzymatic sensor; carbon nanofiber; hydrogen peroxide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fu, Y.; Dai, J.; Ge, Y.; Zhang, Y.; Ke, H.; Zhang, W. A Novel Non-Enzymatic Electrochemical Hydrogen Peroxide Sensor Based on a Metal-Organic Framework/Carbon Nanofiber Composite. Molecules 2018, 23, 2552.

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