离子液1-丁基-3-甲基咪唑六氟磷酸盐修饰碳糊电极的制备与表征

Preparation and Characterization of Ionic Liquid 1-Butyl-3-methyl Imidazolium Hexafluorophate Modified Carbon Paste Electrode

以离子液1-丁基-3-甲基咪唑六氟磷酸盐([BMIM]PF6)代替传统液体石蜡为黏合剂与石墨粉相混合制备了一种新型的离子液修饰碳糊电极(IL-CPE)。采用扫描电子显微镜对电极的表面形貌进行了表征,以铁氰化钾为电化学探针对该离子液修饰电极的电化学行为进行了研究,并与传统碳糊电极进行了比较。结果表明,由于[BMIM]PF6具有较高的导电性,使这种新型离子液修饰电极比传统碳糊电极具有更高的导电效率,电流响应明显增加;同时由于[BMIM]PF6具有一定的黏度和较强的疏水性,使制备的电极具有一定的机械强度和较好的稳定性。

An ionic liquids （ILs） modified carbon paste electrode （CPE） was fabricated with 1-hutyl-3-methyl imidazolium hexafluorophate （[BMIM]PF6） mixed with graphite powder to replace traditional liquid paraffin. The surface morphologies of the IL-CPE were captured by a scanning electron microscopy. The electrochemical behavior of the IL-CPE was investigated using K3 [Fe（CN）6] as the probe and compared with that of traditional CPE. The result showed that the electrochemical response was greatly improved with the high conductivity of ILs and the prepared IL-CPE possessed good mechanic property and stability.