锰掺杂ZIF-67纳米复合材料的制备及其电化学同时检测重金属离子性能研究

Preparation of Manganese-Doped ZIF-67 Nanocomposites and Its Electrochemical Detection of Heavy Metal Ions

通过溶剂热法制备出不同摩尔比的锰掺杂ZIF-67纳米复合材料(Mn-ZIF-67),采用扫描电子显微镜(SEM)和能量色散X射线光谱(EDS)研究了其微观形貌和元素组成,利用X射线衍射(XRD)和X射线光电子能谱(XPS)分析了样品的物相组成以及元素价态。电化学测试结果表明,相比ZIF-67,Mn-ZIF-67具有更好的表面活性和电导率,而且Cd^2+、Pb^2+、Cu^2+、Hg^2+同时检测的方波阳极溶出伏安行为有了显著增强。

Manganese-doped ZIF-67 nanocomposites(Mn-ZIF-67)with different molar ratios were prepared via a solvothermal method,their micromorphology and elemental composition were studied by scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDS),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS)were used to analyze the phase composition and element valence of the samples.Electrochemical test results show that,compared with ZIF-67,Mn-ZIF-67 has better surface activity and electrical conductivity,and the square wave anode stripping voltammetry behavior of simultaneous detection of Cd^2+,Pb^2+,Cu^2+,Hg^2+has been significantly enhanced.This study demonstrates that the dopant menthod is one of the promising methods for enchancing the elelctrochemical sensing performance of ZIF-67 related materials.