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石墨烯-壳聚糖修饰玻碳电极应用于环境水中五氯酚的测定

赵永昕,李莉,王坤,陆天虹,杨小弟*,李卉卉*   

  1. (江苏省新型动力电池重点实验室，江苏省生物功能材料重点实验室，南京师范大学化学与材料科学学院 南京 210097)
  • 收稿日期:2011-11-25 修回日期:2012-02-19 出版日期:2012-10-10 发布日期:2012-10-10
  • 通讯作者: 李卉卉，副教授; Tel:025-83598648; Fax:025-85898280; E-mail:huihuili@njnu.edu.cn; 研究方向：波谱分析，化学生物学
  • 基金资助:
    国家自然科学基金（20875047,20902048）江苏省高校自然科学基金（09KJB250004）水利部专项基金（201201018）和江苏省优势学科资助项目

Application of Graphene-chitosan Modified Electrode for the Detection of Pentachlorophenol in Environmental Water

ZHAO Yongxin, LI Li, WANG Ku, LU Tianhong, YANG Xiaodi*, LI Huihui *   

  1. (Jiangsu Key Laboratory of New Power Batteries,Jiangsu Key Laboratory of Biofunctional Materials,
    School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210097,China)
  • Received:2011-11-25 Revised:2012-02-19 Published:2012-10-10 Online:2012-10-10
  • Contact: Xiaodi

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1320

被引次数

12 | 6

摘要： 制备了石墨烯(CRG)-壳聚糖(CS)修饰玻碳(CRG-CS/GC)电极，用循环伏安法和示差脉冲伏安法研究了五氯酚(PCP)的电化学行为，发现其氧化电流信号与GC电极相比明显增强，表明修饰电极对PCP具有较强的吸附作用，并能够加速电子传递。 建立了一种灵敏简便、重现性好、稳定性好的测定PCP的新修饰电极方法，线性响应范围为1.00×10-7~1.00×10-5 mol/L（R=0.9975），检测限为2.3×10-8 mol/L(S/N=3)。 将该修饰电极应用于实际水样分析，回收率为97%~103%。

关键词: 石墨烯, 修饰电极, 电化学检测, 五氯酚

Abstract: The graphene-chitosan modified glassy carbon(CRG-CS/GC) electrode was prepared. Based on this, the electrochemical behavior of pentachlorophenol(PCP) was investigated by cyclic voltammetry and differential pulse voltammetry. It was found that the oxidation current at CRG-CS/GC electrode is obviously larger than at GC electrode, indicating that the CRG-CS/GC electrode has strong adsorption ability and can promote the electron transport. Then, the CRG-CS/GC electrode with the simple, sensitive, stable and reliable property was developed for the detection of PCP. Using this electrode, analytical performance with the linear range from 1.0×10-7 to 1.0×10-5 mol/L and a limit of detection to 2.3×10-8 mol/L were obtained. The electrochemical sensor with the CRG-CS/GC electrode was successfully employed to detect PCP in several water samples. The recovery can reach 97%~103%.

Key words: Graphene, modified electrode, electrochemical detection, pentachlorophenol

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