【作者】 马晶； 徐尚元； 褚佳； 薛娟琴；

【Author】 Jing Ma;S.Xu;J.Chu;J.Xue;Department of Chemical Engineering, Xi’an University of Architecture and Technology;College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology;

【机构】 西安建筑科技大学化学工程与工艺系； 西安科技大学化学与化工学院；

【摘要】 采用离子液体1-乙基-3-甲基咪唑四氟硼酸盐（[Emin]BF₄）辅助合成具有核壳结构的Fe₃O₄@PPy复合材料。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和傅里叶红外光谱（FT-IR）对Fe₃O₄@PPy的结构、微观形貌进行了表征分析,结果表明:利用离子液体辅助合成的样品在保持Fe₃O₄磁性的基础上,聚吡咯均匀包覆Fe₃O₄,形成核壳结构,且壳层厚度均一。在合成过程中,[Emin]BF₄不仅提高了Fe₃O₄纳米粒子的分散性,而且有利于吡咯聚合过程,提高了导电聚合物的聚合度。将所合成的Fe₃O₄@PPy修饰在玻碳电极上,构建一种H₂O₂传感器,实现对H₂O₂的快速、准确检测。采用循环伏安法（CV）、电化学阻抗法（EIS）对修饰电极进行了表征。相比于聚吡咯导电聚合物,该电极表面存在Fe₃O₄@PPy极大地提高了电极的电化学性能。更多还原

【Abstract】 This study focuses on the effective ionic liquid（IL）-assisted route to synthesis of Fe₃O₄@polypyrrde（Fe₃O₄@PPy） composites with core-shell structure. The morphology and structure of the composites were characterized by transmission electronic microscopy（TEM）, scanning electronic microscopy（SEM）, X-ray powder diffraction（XRD） and Fourier transform infrared（FT-IR） spectroscopy. The results confirmed that the composite process a well-defined core/shell structure. The functionalized IL used here acts as not only the dispersant of Fe₃O₄ but also the catalyst in the synthesis of PPy. An electrochemical sensor based on the Fe₃O₄@PPy for the amperometric determination of H₂O₂ is investigated. The glassy carbonelectrode（GCE） modified with Fe₃O₄@PPy shows enhanced response for the detection of H₂O₂. The composites synthesis with IL-assisted showed less charge transfer resistance and better electronic conductivity compared with pure PPy.更多还原