金属有机框架衍生的多孔碳修饰电极同时检测邻苯二酚和对苯二酚

发布时间：2018-11-09 20:40

【摘要】：本文运用金属有机框架(MOFs)作为模板,在惰性气体下热处理,合成金属有机框架衍生多孔碳材料(Metal Organic Frameworks Derived Porous Carbon,MDPC)。采用扫描电子显微镜(SEM)和X射线粉末衍射(XRD)分别对MDPC进行形貌和相纯度的表征。采用滴涂法将MDPC修饰在玻碳电极表面,运用循环伏安法(CV)、差分脉冲伏安法(DPV)、交流阻抗法(EIS)等电化学方法对该电极进行电化学表征,研究邻苯二酚(CC)和对苯二酚(HQ)在MDPC修饰电极上的电化学行为。结果表明,该修饰电极对CC和HQ这两种异构体表现出优异的氧化还原电活性和区分效果。在最佳实验条件下,CC和HQ的浓度在0.5~80μmol/L的范围内与氧化峰电流呈现良好的线性关系。CC和HQ的检测限分别为0.031μmol/L和0.11μmol/L。该方法电流响应大、灵敏度高、检测限低,具有实际应用前景。
[Abstract]:In this paper, organometallic frame derived porous carbon material (Metal Organic Frameworks Derived Porous Carbon,MDPC was synthesized by heat treatment in inert gas using organometallic frame (MOFs) as template. The morphology and phase purity of MDPC were characterized by scanning electron microscope (SEM) (SEM) and X-ray powder diffraction (XRD), respectively. MDPC was modified on the surface of glassy carbon electrode by drop coating method. The electrode was characterized by cyclic voltammetry (CV),) differential pulse voltammetry (CV), (DPV), AC impedance method (EIS) and other electrochemical methods. The electrochemical behavior of catechol (CC) and hydroquinone (HQ) on MDPC modified electrode was studied. The results showed that the modified electrode exhibited excellent redox activity and distinguishing effect on CC and HQ isomers. Under the optimum experimental conditions, the concentration of CC and HQ showed a good linear relationship with the oxidation peak current in the range of 0.5 渭 mol/L and 80 渭 mol/L. The detection limits of CC and HQ were 0.031 渭 mol/L and 0.11 渭 mol/L., respectively. This method has the advantages of high current response, high sensitivity and low detection limit.
【作者单位】：闽南师范大学化学与环境学院;福建省现代分离分析科学与技术重点实验室闽南师范大学;
【基金】：国家自然科学基金(No.21175115,21475055)
【分类号】：O657.1

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