| 基于石墨烯量子点修饰电极的亚硝酸根电化学传感器 |
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| 引用本文： | 黄海平,徐亮,岳亚锋,许方.基于石墨烯量子点修饰电极的亚硝酸根电化学传感器[J].有色金属科学与工程,2017,8(2):47-51. |
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| 作者姓名： | 黄海平 徐亮 岳亚锋 许方 |
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| 作者单位： | 江西理工大学冶金与化学工程学院，江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金资助项目21465013国家自然科学基金资助项目21005034中国博士后科学基金面上项目2014M551550江西省自然科学青年科学基金项目20114BAB213014江西理工大学清江青年英才支持计划资助项目 |
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| 摘 要： | 文章将石墨烯量子点 (GQDs) 固载在裸玻碳 (GC) 电极表面形成石墨烯量子点修饰膜，制备亚硝酸根 (NO2-) 电化学传感器.利用透射电镜 (TEM) 和X-射线衍射 (XRD) 对石墨烯量子点材料进行表征；采用循环伏安 (CV)、差分脉冲伏安 (DPV) 和电流-时间曲线 (I-T) 技术研究NO2-在石墨烯量子点修饰电极表面的电化学行为.实验结果表明，该电化学传感器对NO2-具有良好的电催化氧化性，在1~29 μmol/L浓度范围呈现良好的线性关系，检出限为3.33×10-7 mol/L (S/N=3).该电化学传感器具有较宽的检测范围、低的检出限、好的选择性.
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| 关 键 词： | 石墨烯量子点 修饰电极 亚硝酸盐 电化学传感器 |
| 收稿时间： | 2016-09-02 |
Nitrite electrochemical sensor based on graphene quantum dots modified electrode |
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| Affiliation: | School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | Material of grapheme quantum dots was dropped on the surface of glassy carbon electrode to form its film, and nitrite (NO2-) electrochemical sensor was prepared. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were utilized to characterize grapheme quantum dots (GQDs). Meanwhile, electrochemical behavior of nitrite was researched by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and current-time curve (I-T) on the surface of modified electrode. The experimental results show that electrochemical sensor exhibits a good electrocatalysis to NO2- and possesses a broad linear range in 1~29 μmol/L with detection limit of 3.33×10-7 mol/L (S/N=3). The electrochemical sensor shows the characteristics of wide detection range, low detection limit and good stability. |
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