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首页> 外文期刊>International Journal of Electrochemical Science >Poly(o-phenylenediamine)-Multiwalled Carbon Nanotube Nanocomposite Based Electrochemical Sensing Platform for Paraquat Detection
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Poly(o-phenylenediamine)-Multiwalled Carbon Nanotube Nanocomposite Based Electrochemical Sensing Platform for Paraquat Detection

机译：聚（邻苯二胺）-多壁碳纳米管纳米复合材料的百草枯检测电化学传感平台

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Poly(o-phenylenediamine)-Multiwalled Carbon Nanotube nanocomposite was prepared by theelectropolymerization of o-phenylenediamine (PoPD) onto the functionalized multiwalled carbonnanotube nanocomposite (MWCNT) which acts as the good sensing materials for the electrochemicalsensing of paraquat. Atomic force microscopy (AFM) image confirms somewhat large agglomeratedstructures suggesting the deposition of PoPD onto the MWCNT. The electrochemical reduction ofparaquat at four electrodes viz. glassy carbon electrode (GCE), MWCNT/GCE, PoPD/GCE and PoPD-MWCNT/GCE are studied. The cyclic voltammograms has been studied for the electrochemicalreduction of paraquat at four different electrodes such as glassy carbon electrode (GCE), MWCNT/GCE,PoPD/GCE and PoPD-MWCNT/GCE. Poly (o-phenylenediamine)-Multiwalled Carbon Nanotubenanocomposite shows highest cathodic current compared to other modified eletrodes. Differentexperimental parameters such as influence of scan rate and pH have been optimized for the sensorstudies. The sensor calibration plot for paraquat has been constructed using square wave voltammetry(SWV) sensor in the linear range from 8.8 × 10 -7 M to 2.5 × 10 -8 M. The developed sensor resulted in adetection limit and current sensitivity values of 1.4 ×10 -9 M and 80.38 mA mM -1 respectively. Real sampleanalysis for cabbage samples and interference studies in the presence of selected metal ions andsurfactants have been carried out.
机译：通过邻苯二胺（PoPD）在功能化的多壁碳纳米管纳米复合材料（MWCNT）上的电聚合反应制备了聚（邻苯二胺）-多壁碳纳米管纳米复合材料。原子力显微镜（AFM）图像证实了较大的团聚结构，表明PoPD沉积在MWCNT上。百草枯在四个电极上的电化学还原。研究了玻碳电极（GCE），MWCNT / GCE，PoPD / GCE和PoPD-MWCNT / GCE。已经研究了循环伏安图，用于在四种不同电极（例如玻璃碳电极（GCE），MWCNT / GCE，PoPD / GCE和PoPD-MWCNT / GCE）上对百草枯进行电化学还原。与其他修饰电极相比，聚（邻苯二胺）-多壁碳纳米管纳米复合材料显示出最高的阴极电流。已针对传感器研究优化了不同的实验参数，例如扫描速率和pH的影响。百草枯的传感器校准图是使用方波伏安法（SWV）传感器在8.8×10 -7 M至2.5×10 -8 M的线性范围内构建的。开发的传感器得出的检测极限和电流灵敏度值为1.4× 10 -9 M和80.38 mA mM -1。卷心菜样品的真实样品分析和在选择的金属离子和表面活性剂存在下的干扰研究已经进行。

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