一步热解法制备多孔碳-纳米金电极检测酚类
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O657.1

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湖北省教育厅重点项目(No. D20191903)


Preparation of porous carbon-nanogold electrode by one-step pyrolysis method for the determination of phenols
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National Natural Science Foundation of China Regional Science Fund Project (21561011), Hubei University for Nationalities Doctoral Startup Fund (MY2013B027), Biological Resources Protection and Utilization Hubei Provincial Key Laboratory Open Fund Project (PKLHB1911), Hubei Province “Double First-Class” Construction Special Fund Project, Hubei University for Nationalities Innovation and Entrepreneurship Project (X201910517115)

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    摘要:

    以氯金酸处理过的铁基金属有机框架(Metal Organic Frameworks, MOFs-Fe)材料为模板,通过一步热解法制备了基于MOFs-Fe的热解多孔碳负载金纳米材料(MOFs-Fe Porous Carbon/Au Nanopowders MFPC/Au-NPs)。通过扫描电子显微镜(SEM)及X-射线粉末衍射(XRD)表征了样品的形貌及相纯度,用X射线光电子能谱(XPS)和全自动比表面和孔径分析仪对复合材料所含元素、比表面积及孔径分布进行了测试。通过滴涂法制备了修饰电极(MFPC/Au-NPs/GCE),用循环伏安法(CV)、差分脉冲伏安法(DPV)和交流阻抗法(EIS)测试了邻苯二酚(CA)及对苯二酚(HQ)在此电极上的电化学行为。在pH=7.4条件下,HQ和CA的氧化峰电流在浓度为0.4~20 μmol/L时与浓度呈线性关系,检出限分别为0.039 μmol/L和0.040 μmol/L。该电极检出限低,灵敏度高,为快速检测邻苯二酚和对苯二酚提供了一种简便快速的方法。

    Abstract:

    Fe-based metal organic frameworks (MOF-Fe) treated by chloroauric acid were used as template to prepare MOFs-Fe porous carbon/Au nanopowders (MFPC/Au-NPs) by one-step pyrolysis method. The morphology and phase purity of the sample were characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). The elements, specific surface area and pore size distribution of the composites were determined by X-ray photoelectron spectroscopy (XPS) and automatic specific surface and aperture analyzer. A modified electrode (MFPC/Au-NPs/GCE) was prepared by drop-coating method. The electrochemical behavior of catechol (CA) and hydroquinone (HQ) on this electrode were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). At pH=7.4, the oxidation peak currents of HQ and CA on the modified electrode showed a linear relationship with their concentration in the range of 0.4~20 μmol/L. The corresponding detection limits were 0.039 and 0.040 μmol/L. This sensor exhibits low detection limit and high sensitivity, and provides a simple and rapid method for the detection of CA and HQ.relationship at a concentration of 0.4~20 μmol/L, and the detection limits are 0.039 μmol/ L and 0.040 μmol/L. This sensor has low detection limit and high sensitivity, and provides a simple and rapid method for rapid detection of catechol and hydroquinone.

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陈泇冰,郑寅.一步热解法制备多孔碳-纳米金电极检测酚类[J].精细化工,2020,37(4):

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  • 收稿日期:2019-10-28
  • 最后修改日期:2019-12-27
  • 录用日期:2019-12-27
  • 在线发布日期: 2020-03-23
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