采用水热法在400℃的条件下煅烧并形成Co₃O₄微球，通过XRD粉末衍射、SEM等对Co₃O₄结构及形貌进行表征，并用循环伏安法（Cyclic Voltammetry，CV）和电化学阻抗谱法（Electrochemical Impedance Spectroscopy，EIS）对Co₃O₄的电化学性能进行表征。利用Co₃O₄修饰玻碳电极（Co₃O₄/GCE）并通过方波伏安法（Square wave voltammetry，SWV）检测邻苯二酚，在3.3~33 μmol/L的浓度范围内，邻苯二酚浓度和峰电流值呈线性关系，回归方程的相关系数为0.995，检测限（LOD）为0.42 μmol/L （3σ法），灵敏度为0.029 μA·（μmol/L）^-1。同时进行了电极的稳定性实验，经10次循环，其峰电流的相对标准偏差（RSD）为0.25%。还对实际水样进行加标回收实验，该电极对实际水样的检测呈现出良好的性能。

The Co₃O₄ microspheres are synthesized through hydrothermal method calcining at 400℃.The structure and morphology of Co₃O₄ microspheres obtained are characterized by X-ray power diffraction (XRD) and scanning electronic microscopy (SEM).The electrochemical performances of Co₃O₄ microspheres are characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).Glassy carbon electrode (GCE) is modified by Co₃O₄ microspheres.Then Co3O4/GCE electrode is used to detect catechol by square wave voltammetry (SWV) method.Results show that if the concentration of catechol is in the range of 3.3 μmol·L^-1 to 33 μmol·L^-1,the concentration of catechol is linear with peak current value with the correlation coefficient of regression equation being 0.995.The detection limit is 0.42 μmol·L^-1 (3σ method) and the sensitivity is 0.029 μA·(μmol/L)^-1.Besides,the stability of Co₃O₄/GCE electrode is also detected through experiments,and results indicate that the relative standard deviation (RSD) for peak current is 0.25% after 10 cycles.It is also applied to the determination of catechol in real water samples using the standard addition method and exhibits a good performance as well.

武媛媛(1993-),女,硕士研究生,研究方向为环境功能材料,18235149023@163.com