基于双金属有机骨架的Cu/Cu_(2)O/C制备及其在对乙酰氨基酚测定中的应用

Preparation of Cu/Cu_(2)O/C based on bimetallic organic frameworks and its application in the determination of acetaminophen

以双金属有机骨架材料Cu-Zn-MOF为前驱体,热解法制备了铜/氧化亚铜复合碳材料(Cu/Cu_(2)O/C)。通过扫描电子显微镜和X射线衍射仪,对材料的形貌、结构和组成进行了表征。Cu/Cu_(2)O/C保持了前驱体Cu-Zn-MOF的八面体形貌,颗粒发生皱缩且表面疏松多孔。Cu/Cu_(2)O/C修饰玻碳电极(Cu/Cu_(2)O/C/GCE)对对乙酰氨基酚(AC)表现出良好的电催化氧化活性。采用差分脉冲伏安法对AC进行测定。结果表明,Cu/Cu_(2)O/C/GCE的电流响应值与AC浓度分别在2~20μmol/L和20~100μmol/L范围内呈良好的线性关系,灵敏度为7.21μA·L/(μmol·cm^(2))和2.26μA·L/(μmol·cm^(2))。

Copper/cuprous oxide composites carbon materials(Cu/Cu_(2)O/C)were successfully prepared by pyrolysis with bimetallic organic frameworks Cu-Zn-MOF as a precursor.The morphology,structure and phase composition of the Cu/Cu_(2)O/C were characterized by scanning electron microscope and X-ray diffractometer.The Cu/Cu_(2)O/C maintained the octahedral morphology of Cu-Zn-MOF precursor,however,the particles were obviously shrank and the surface was loose and porous.The Cu/Cu_(2)O/C modified glassy carbon electrode(Cu/Cu_(2)O/C/GCE)exhibited good electrocatalytic oxidation activity towards acetaminophen(AC).AC was determined by differential pulse voltammetry.The results displayed that the response current of the Cu/Cu_(2)O/C/GCE showed good linearity with the AC concentration in the ranges of 2-20μmol/L and 20-100μmol/L,and the sensitivity were 7.21μA·L/(μmol·cm^(2))and 2.26μA·L/(μmol·cm^(2)),respectively.