Electrochemical Determination of Sulfamethoxazole Based on Ag Nanoparticles/Multi walled Carbon Nanotubes Modified Electrode

兰天宇; 董泽刚; 杜海军

doi:doi：10.3969/j.issn.1004-4957.2019.11.006

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Electrochemical Determination of Sulfamethoxazole Based on Ag Nanoparticles/Multi walled Carbon Nanotubes Modified Electrode

- Electrochemical Determination of Sulfamethoxazole Based on Ag Nanoparticles/Multi walled Carbon Nanotubes Modified Electrode
- Vol. 38, Issue 11, Pages: 1321-1327(2019)
- 作者机构：
  
  1. 贵州民族大学化学工程学院(民族医药学院)
  2. 贵州民族大学生态环境工程学院
- 作者简介：
- 基金信息：
- DOI：doi：10.3969/j.issn.1004-4957.2019.11.006
  CLC：
- Published：2019
- 稿件说明：
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兰天宇, 董泽刚, 杜海军. Electrochemical Determination of Sulfamethoxazole Based on Ag Nanoparticles/Multi walled Carbon Nanotubes Modified Electrode[J]. 2019, 38(11): 1321-1327.
DOI：

兰天宇, 董泽刚, 杜海军. Electrochemical Determination of Sulfamethoxazole Based on Ag Nanoparticles/Multi walled Carbon Nanotubes Modified Electrode[J]. 2019, 38(11): 1321-1327. DOI： doi：10.3969/j.issn.1004-4957.2019.11.006.

摘要

以表面处理多壁碳纳米管(MWCNTs)和硝酸银为原料，利用硼氢化钠还原法制备了纳米银/多壁碳纳米管复合材料(AgNPs/MWCNTs)，并通过紫外-可见吸收光谱、红外光谱、拉曼光谱和X射线衍射进行表征。采用滴涂法将该纳米复合材料修饰至玻碳电极表面，得到纳米银/多壁碳纳米管修饰电极(AgNPs/MWCNTs/GCE)。以AgNPs/MWCNTs/GCE为工作电极，研究了缓冲溶液、pH值、支持电解质和扫描速度对磺胺甲唑(SMZ)电化学反应活性的影响。结果表明，与多壁碳纳米管、纳米银单独修饰电极相比，该纳米复合材料修饰电极对SMZ显示了更高的电催化活性。优化条件下，SMZ浓度在3.0×10-7~5.0×10-5 mol/L范围内与峰电流呈线性关系，检出限(S/N=3)为6.4×10-8 mol/L。该方法操作简单、快速，可用于河水样品中SMZ的检测。

Abstract

In this work

Ag nanoparticles/multi walled carbon nanotubes(AgNPs/MWCNTs) composites were synthesized with multi walled carbon nanotubes(MWCNTs) and silver nitrate as raw materials

and sodium borohydride as reduction agent

and the AgNPs/MWCNTs composites were characterized by ultraviolet visible absorption spectroscopy

infrared spectroscopy

Raman spectroscopy and X-ray diffraction.Based on this

an Ag nanoparticles/multi walled carbon nanotubes modified electrode(AgNPs/MWCNTs/GCE) was prepared by immobilizing AgNPs/MWCNTs onto the surface of glassy carbon electrode.Effects of buffer solution

pH value，supporting electrolyte and scanning rate on electrochemical reactivity of the AgNPs/MWCNTs/GCE were investigated.Results showed that the nanocomposite modified electrode had a better electrocatalytic activity for sulfamethoxazole(SMZ)

compared with MWCNTs or Ag nanoparticles modified electrode.Under the optimized conditions

there was a linear relationship between SMZ and peak current in the range of 3.0×10-7-5.0×10-5 mol/L

and the limit of detection(S/N=3) was 6.4×10-8 mol/L.The method is simple and rapid

and could be used for the detection of SMZ in river samples.

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