文献类型：期刊文献

英文题名：Electrochemical sensing of nicotine using screen-printed carbon electrodes modified with nitrogen-doped graphene sheets

作者：Li, Xiaoqing[1];Zhao, Hongli[1];Shi, Libo[1];Zhu, Xiang[1];Lan, Minbo[1];Zhang, Qian[2];Fan, Z. Hugh[3]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Tobacco Grp Co Ltd, Technol Res & Dev Ctr, Shanghai 200093, Peoples R China;[3]Univ Florida, Dept Mech & Aerosp Engn, POB 116250, Gainesville, FL 32611 USA

年份：2017

卷号：784

起止页码：77

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20165103134979);WOS:【SCI-EXPANDED(收录号:WOS:000392353400011)】；

语种：英文

外文关键词：Nicotine; Nitrogen-doped graphene sheets; Electrochemical sensing

摘要：Rapid and accurate detection of nicotine is important due to its detrimental effects on human beings and recent surge in the usage of electronic cigarettes. In this paper, we report an electrochemical sensor for nicotine detection by using screen-printed carbon electrodes (SPCE) modified with nitrogen-doped graphene sheets (NGS). NGS was synthesized and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectrometry. Due to the superior electron transfer capability and the doped nitrogen atoms, NGS shows high catalytic activity for the electro-oxidation of nicotine, with a significant decrease in the overpotential. Using the NGS-based nicotine sensor, we obtained detection sensitivity at 0.627 mA.cm(-2) mM(-1) with the limit of detection at 47 nM nicotine. Moreover, the sensor shows favorable selectivity and long-term stability for detecting nicotine in urine and tobacco samples. (C) 2016 Elsevier B.V. All rights reserved.