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Sensors 2017, 17(10), 2407; https://doi.org/10.3390/s17102407

Nitrogen-Rich Polyacrylonitrile-Based Graphitic Carbons for Hydrogen Peroxide Sensing

1
Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA
2
Irvine Materials Research Institute (IMRI), University of California, Irvine, CA 92697, USA
3
Department of Mechanical Engineering, California State University, Fresno, CA 93740, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 15 August 2017 / Revised: 15 September 2017 / Accepted: 17 October 2017 / Published: 21 October 2017
(This article belongs to the Special Issue Advanced Sensors Based on Carbon Electrodes)
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Abstract

Catalytic substrate, which is devoid of expensive noble metals and enzymes for hydrogen peroxide (H2O2), reduction reactions can be obtained via nitrogen doping of graphite. Here, we report a facile fabrication method for obtaining such nitrogen doped graphitized carbon using polyacrylonitrile (PAN) mats and its use in H2O2 sensing. A high degree of graphitization was obtained with a mechanical treatment of the PAN fibers embedded with carbon nanotubes (CNT) prior to the pyrolysis step. The electrochemical testing showed a limit of detection (LOD) 0.609 µM and sensitivity of 2.54 µA cm−2 mM−1. The promising sensing performance of the developed carbon electrodes can be attributed to the presence of high content of pyridinic and graphitic nitrogens in the pyrolytic carbons, as confirmed by X-ray photoelectron spectroscopy. The reported results suggest that, despite their simple fabrication, the hydrogen peroxide sensors developed from pyrolytic carbon nanofibers are comparable with their sophisticated nitrogen-doped graphene counterparts. View Full-Text
Keywords: hydrogen peroxide sensing; polyacrylonitrile; graphitization; electrospinning; graphitic nitrogen; pyridinic nitrogen hydrogen peroxide sensing; polyacrylonitrile; graphitization; electrospinning; graphitic nitrogen; pyridinic nitrogen
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Pollack, B.; Holmberg, S.; George, D.; Tran, I.; Madou, M.; Ghazinejad, M. Nitrogen-Rich Polyacrylonitrile-Based Graphitic Carbons for Hydrogen Peroxide Sensing. Sensors 2017, 17, 2407.

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