Zn-Ni MOF/rGO复合结构的制备及其电化学性能

Preparation and Electrochemical Properties of Zn-Ni MOF/rGO Composite Structures

采用溶剂热法和电化学还原法制备了双金属锌-镍金属有机框架/还原氧化石墨烯(Zn-Ni MOF/rGO)复合结构。利用扫描电子显微镜(SEM)对Zn-Ni MOF/rGO复合结构形貌进行了表征。通过循环伏安(CV)法和计时安培滴定法对修饰在玻碳电极(GCE)上的Zn-Ni MOF/rGO/GCE传感器的性能进行了测试。实验结果表明:制备的Zn-Ni MOF/rGO/GCE传感器对亚硝酸盐的检测具有灵敏度高(0.50μA·μM^(-1)·cm^(-2),1 M=1 mol/L)、线性范围宽(1.0~2000μM)、检测限低(0.47μM)以及良好的选择性和长期稳定性等特点。因此,制备的基于Zn-Ni MOF/rGO复合结构的传感器能够实现对亚硝酸盐的高性能检测,并在实际环境检测中具有潜在的应用前景。

Bimetallic zinc-nickel metal organic framework(Zn-Ni MOF)/reduced graphene oxide(rGO)composite structures were prepared by solvothermal and electrochemical reduction methods.The morphologies of the Zn-Ni MOF/rGO composite structures were characterized by scanning electron microscope(SEM).The properties of Zn-Ni MOF/rGO/GCE sensor modified on glassy carbon electrode(GCE)were measured through cyclic voltammetry(CV)method and timing amperometric titration.The measured results show that the Zn-Ni MOF/rGO/GCE sensor exhibits high sensitivity(0.50μA·μM^(-1)·cm^(-2),1 M=1 mol/L),wide linear range(1.0-2000μM),low detection limit(0.47μM),good selectivity and long-term stability for the nitrite detection.Thus,the as-fabricated sensor based on the Zn-Ni MOF/rGO composite structure has high performance of detection for nitrite and a potential application prospect in the real environmental detection.