当前位置: X-MOL 学术Microchim. Acta › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Electrochemical quercetin sensor based on a nanocomposite consisting of magnetized reduced graphene oxide, silver nanoparticles and a molecularly imprinted polymer on a screen-printed electrode
Microchimica Acta ( IF 5.7 ) Pub Date : 2017-12-20 , DOI: 10.1007/s00604-017-2613-5
Zufu Yao , Xin Yang , Xiaobo Liu , Yaqi Yang , Yangjian Hu , Zijian Zhao

AbstractAn electrochemical quercetin (QR) sensor is described that is based on the use of magnetic reduced graphene oxide (MrGO) incorporated into a molecularly imprinted polymer (MIP) on the surface of a screen-printed electrode (SPE). The MrGO consists of reduced graphene oxide (rGO), magnetite (Fe3O4) and silver nanoparticles (Ag). The analyte (QR) is electrostatically adsorbed on the surface of the MrGO. Finally, the MIP was deposited via in-situ polymerization. The composite was characterized by X-ray diffraction, Fourier transform infrared spectroscopy and Vibrating sample magnetometry. The morphologies and electrochemical properties of different electrodes were characterized by Field emission scanning electron microscopy, Electrochemical impedance spectroscopy and differential pulse voltammetry. Under optimal conditions, the modified electrode has a linear response in the 20 nM to 250 μM QR concentration range. The limit of detection is 13 nM (at an S/N ratio of 3). The electrode is selective, stable, regenerable and reliable. It was applied to the determination of QR in spiked pharmaceutical samples and gave satisfactory results. Graphical abstractSchematic presentation of a method for sensing quercetin. It is based on the use of screen printed electrode modified with magnetized reduced graphene oxide and a molecularly imprinted polymer.

中文翻译:

基于纳米复合材料的电化学槲皮素传感器由磁化还原氧化石墨烯、银纳米颗粒和丝网印刷电极上的分子印迹聚合物组成

摘要描述了一种电化学槲皮素 (QR) 传感器,该传感器基于将磁性还原氧化石墨烯 (MrGO) 结合到丝网印刷电极 (SPE) 表面上的分子印迹聚合物 (MIP) 中。MrGO 由还原氧化石墨烯 (rGO)、磁铁矿 (Fe3O4) 和银纳米粒子 (Ag) 组成。分析物 (QR) 静电吸附在 MrGO 表面。最后,通过原位聚合沉积 MIP。通过X射线衍射、傅里叶变换红外光谱和振动样品磁强法对复合材料进行了表征。通过场发射扫描电子显微镜、电化学阻抗谱和差分脉冲伏安法对不同电极的形貌和电化学性能进行了表征。在最佳条件下,修饰电极在 20 nM 至 250 μM QR 浓度范围内具有线性响应。检测限为 13 nM(信噪比为 3)。电极具有选择性、稳定性、可再生性和可靠性。应用于加标药物样品中QR的测定,结果令人满意。图形摘要示意图表示一种检测槲皮素的方法。它基于使用磁化还原氧化石墨烯和分子印迹聚合物改性的丝网印刷电极。图形摘要示意图表示一种检测槲皮素的方法。它基于使用磁化还原氧化石墨烯和分子印迹聚合物改性的丝网印刷电极。图形摘要示意图表示一种检测槲皮素的方法。它基于使用磁化还原氧化石墨烯和分子印迹聚合物改性的丝网印刷电极。
更新日期:2017-12-20
down
wechat
bug