Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai 200135, China.
Talanta. 2015 Jan;132:155-61. doi: 10.1016/j.talanta.2014.09.008. Epub 2014 Sep 16.
A sensitive and selective electrochemical sensor based on molecular imprinting polymers grafted graphene (MIPs-G) was developed for simultaneous measurement of 4, 4-methylene diphenylamine (MDA) and aniline by differential pulse voltammetry (DPV). MIPs-G was synthesized via free radical polymerization reaction using MDA and 4-vinyl pyridine as template molecule and functional monomer respectively. The obtained nanocomposites were characterized by transmission electron microscope, scanning electron microscope, Fourier transform infrared spectrometry, Raman spectroscopy and thermal gravimetric analysis. After removal template molecules, MIPs-G was used as electrode material for aromatic amines measurements. Due to the high binding affinity towards MDA and the π-π interaction with aniline, the MIPs-G based electrochemical sensor can be used for simultaneous detection of MDA and aniline by DPV. Under the optimized condition, the oxidation potentials for MDA and aniline were observed at 0.62 and 0.72 V, respectively. Moreover, MIPs-G modified glassy carbon electrode shows linear response towards MDA and aniline simultaneously over the range of 1.0 to 15 μM. The MIPs-G based electrochemical sensor has been applied for simultaneous measurement of MDA and aniline in plastic tableware.
基于接枝石墨烯的分子印迹聚合物（MIPs-G）的灵敏和选择性电化学传感器，通过差分脉冲伏安法（DPV）同时测量 4,4-亚甲基二苯胺（MDA）和苯胺。MIPs-G 通过自由基聚合反应合成，以 MDA 和 4-乙烯基吡啶分别作为模板分子和功能单体。通过透射电子显微镜、扫描电子显微镜、傅里叶变换红外光谱、拉曼光谱和热重分析对获得的纳米复合材料进行了表征。去除模板分子后，MIPs-G 被用作测量芳香胺的电极材料。由于对 MDA 具有高结合亲和力以及与苯胺的π-π相互作用，基于 MIPs-G 的电化学传感器可用于通过 DPV 同时检测 MDA 和苯胺。在优化条件下，MDA 和苯胺的氧化电位分别为 0.62 和 0.72 V。此外，MIPs-G 修饰的玻碳电极对 MDA 和苯胺在 1.0 至 15 μM 的范围内同时表现出线性响应。基于 MIPs-G 的电化学传感器已应用于同时测量塑料餐具中的 MDA 和苯胺。
