离子印迹磁性碳纳米球基电化学传感器用于铜（II）的选择性检测

A highly selective and sensitive electrochemical Cu(II) detector based on ion-imprinted magnetic carbon nanospheres

    摘要
  • 摘要: 本文报道一种基于Cu(II)离子印迹聚合物为识别元件的电化学传感器。通过耦合表面离子印迹和电化学沉积的制备方法，制备了由磁性碳纳米球组成的离子印迹聚合物电极。所组装的传感器表现出对Cu(II)检测的特异识别性和高灵敏特性。通过场发射扫描电子显微镜和透射电子显微镜对印迹聚合物的微观形貌进行表征，采用傅里叶变换红外光谱对其官能团和化学结构进行表征。传感器电化学性能表明，与非印迹电极和裸电极相比，印迹电极对Cu(II)具有更强的选择性和更高的灵敏度。传感器对浓度为10−6至10−10 mol L−1的Cu(II)表现出良好的线性相应电流，其检测限提升至5.138×10−16 mol L−1 (S/N=3)。此外，该传感器具有良好的抗干扰性、重现性和稳定性，为金属离子的检测提供了新的策略。

     

    Abstract: An electrochemical sensor for Cu(II) based on ion-imprinted polymers was prepared by combining surface imprinting with electrochemical polymerization deposition. The sensor was modified by ion-imprinted magnetic carbon nanospheres with a specific selectivity and sensitivity for Cu(II). The morphology and structure of the materials were characterized and analyzed. Sensors with the imprinted electrode had a stronger selectivity and higher sensitivity towards Cu(II) compared with their original counterparts. Within relative concentrations of Cu(II) from 10−6 to 10−10 mol L−1, the detection limit of the sensor was as low as 5.138×10−16 mol L−1 (S/N=3). The sensor is resistant to interference, and has good reproducibility, and stability, making it excellent for the electrochemical detection of metal ions.

     

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