基于石墨烯量子点修饰电极的亚硝酸根电化学传感器  

Nitrite electrochemical sensor based on graphene quantum dots modified electrode

作　　者：黄海平[1] 徐亮[1] 岳亚锋[1] 许方[1] HUANG Haiping XU Liang YUE Yafeng XU Fang(School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2017年第2期47-51,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(21465013;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

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(NO_2^-)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NO_2^-具有良好的电催化氧化性,在1~29μmol/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.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 vohammetry （CV）, differential pulse voltammetry（DPV）and current- time curve （l-T） on the surface of modified electrode. The experimental results show that electrochemical sensor exhibits a good electrocatalysis to NO- 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.

关 键 词：石墨烯量子点 修饰电极 亚硝酸盐 电化学传感器 

分 类 号：O643.36[理学—物理化学] O657.1[理学—化学]