双金属MOF衍生ZnCo多孔碳骨架电化学分析Hg(Ⅱ)的研究

Study on Electrochemical Analysis of Hg(Ⅱ)of ZnCo Porous Carbon Framework Derived by Bimetallic MOF

以Zn/Co-ZIF为前驱体制备了高比表面积、高石墨化程度和均匀N掺杂的双金属MOF衍生ZnCo多孔碳骨架。采用扫描电镜(SEM)、透射电镜(TEM)和能谱(EDS)对其形貌和元素组成进行了表征,并利用X射线衍射(XRD)和X射线光电子能谱(XPS)对其物相和元素价态进行研究。利用ZnCo多孔碳骨架复合材料修饰电极构建电化学传感器,采用方波阳极溶出伏安法分析水环境中的Hg(Ⅱ),新型传感器表现为宽的检测范围,较好的灵敏度、线性程度和检测限。

A bimetal MOF-derived ZnCo porous carbon framework with high specific surface area,high graphitization degree and uniform N doping was prepared using Zn/Co-ZIF as the precursor.The morphology and element composition were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM)and energy spectroscopy(EDS).Its phase and element valence state was studied by X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The electrochemical sensor was constructed using ZnCo porous carbon framework composite material to modify the electrode,and the square wave anodic stripping voltammetry was used to analyze Hg(Ⅱ)in the water environment.The new sensor showed a wide detection range,good sensitivity,linearity and detection limit.