Nitrogen-doped graphic carbon protected Cu/Co/CoO nanoparticles for ultrasensitive and stable non-enzymatic determination of glucose and fructose in wine
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© The Electrochemical Society, Inc. 2018. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in He, J. and Zhong, Y. and Xu, Q. and Sun, H. and Zhou, W. and Shao, Z. 2018. Nitrogen-doped graphic carbon protected Cu/Co/CoO nanoparticles for ultrasensitive and stable non-enzymatic determination of glucose and fructose in wine. Journal of the Electrochemical Society. 165 (13): pp. B543-B550.
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© 2018 The Electrochemical Society.
Food safety has always been a very serious and global concern. Content determination of each component is one of the most routine analyses in food testing. Here, nitrogen-doped graphic carbon (NGC)-coated Cu/Co/CoO nanoparticles (Cu/Co/CoO/NGC) show excellent performance for glucose and fructose detection in wine. The high sensitivity (1,035 μA mM−1 cm−2), low determination (0.2 μM) and large linear range (10-9,300 μM) characteristic of the Cu/Co/CoO/NGC sensor are attributed to the synergistic effect between the Cu, Co and CoO nanoparticles coated by NGC and the catalytically active M-Nx moieties (M = Cu and Co). Importantly, the good stability and antioxidation of the Cu/Co/CoO/NGC electrode result from the protection provided by the NGC shell. In addition, disposable, low-cost, and compact screen-printed carbon electrodes (SPCEs) modified by the Cu/Co/CoO/NGC (Cu/Co/CoO/NGC/SPCEs) were used to detect the sugar content in wine samples with a good reliability (R.S.D. = 1.7%) and recovery (103.2%). Thus, Cu/Co/CoO/NGC/SPCEs will be popular in the detection of real samples.