A Sensitive Electrochemiluminescence Diuron Sensor Based on a 3D Graphene/Ru(bpy)2+3-doped Silica Nanocomposite Modified Electrode

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A Sensitive Electrochemiluminescence Diuron Sensor Based on a 3D Graphene/Ru(bpy)2+3-doped Silica Nanocomposite Modified Electrode

- A Sensitive Electrochemiluminescence Diuron Sensor Based on a 3D Graphene/Ru(bpy)2+3-doped Silica Nanocomposite Modified Electrode
- Vol. 35, Issue 12, Pages: 1616-1621(2016)
- 作者机构：
  
  1. 广西民族大学化学化工学院
  2. 广西高校食品安全与药物分析化学重点实验室
  3. 广西林产化学与工程重点实验室
- 作者简介：
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A Sensitive Electrochemiluminescence Diuron Sensor Based on a 3D Graphene/Ru(bpy)2+3-doped Silica Nanocomposite Modified Electrode. [J]. 35(12):1616-1621(2016)
DOI：

A Sensitive Electrochemiluminescence Diuron Sensor Based on a 3D Graphene/Ru(bpy)2+3-doped Silica Nanocomposite Modified Electrode. [J]. 35(12):1616-1621(2016) DOI：

摘要

利用敌草隆对三联吡啶钌电化学发光(ECL)的增敏作用，以3D石墨烯和二氧化硅固定三联吡啶钌纳米复合材料(SiO2@Ru(bpy)2+3)修饰的玻碳电极为工作电极，建立了一种直接快速检测敌草隆的电化学发光新方法。通过一步水热法合成了3D石墨烯以促进电子传递，油包水微乳液法合成SiO2@Ru(bpy)2+3以提高发光效率。在最佳实验条件下，敌草隆浓度的对数在9.08×10-11~9.08×10-7 mol/L范围内与其相对发光强度呈良好的线性关系(r2=0.998 9),检出限(S/N=3)为1.18×10-12 mol/L。连续测定2.00×10-8 mol/L敌草隆10次，发光强度值的相对标准偏差(RSD)为4.2%，表明该方法具有良好的重复性。用该方法对青菜进行检测，回收率为99.3%~110.8%，结果满意。

Abstract

Based on the enhancement of ECL intensity of Ｒu(bpy)2+3 in the presence of diuron，a new ECL method was established for the determination of diuron at the glassy carbon electrode modified with Nafion film of 3D graphene and SiO2@Ru.The 3D graphene which has the ability to enhance the intensity of electrochemiluminescence(ECL) was synthesized by a one-pot hydrothermal method.In addition，Ｒu(bpy)2+3-doped silica nanoparticle was prepared by water-in-oil microemulsion method to increase the ECL intensity.Under the optimum conditions，the ECL intensity was well proportional to the logarithmic of diuron concentration in the range of 9.08×10-11-9.08×10-7 mol/L with a detection limit as low as 1.18×10-12 mol/L.The RSD for 2.00×10-8 mol/L diuron(n=10) was 4.2%,which indicated that this method had a good repeatability.The method was applied in the determination of diuron in vegetable samples with recoveries of 99.3%-110.8%.

关键词

电化学发光敌草隆3D石墨烯SiO2@Ru(bpy)2+3修饰电极

Keywords

electrochemiluminescencediuron3D graphemeRu(bpy)2+3-doped silica nanoparticlemodified electrode

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Related Institution

Department of Environmental Science，Beijing University of Technology

Shaanxi Key Laboratory of Chemical Reaction Engineering，Yan’an

College of Chemistry and Chemical Engineering，Yan’an University，Yan’an

School of Chemical Engineering， Guizhou Minzu University

Guangxi Liuzhou Luosifen Research Center of Engineering Technology， Guangxi Key Laboratory of Green Processing of Sugar Resources， College of Biological and Chemical Engineering， Guangxi University of Science and Technology

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