标题：Highly sensitive detection of 2,4,6-trichlorophenol based on HS-β-cyclodextrin/gold nanoparticles composites modified indium tin oxide electrode
作者：Zheng, Xiangli ;Liu, Shan ;Hua, Xiaoxia ;Xia, Fangquan ;Tian, Dong ;Zhou, Changli
作者机构：[Zheng, Xiangli ;Liu, Shan ;Hua, Xiaoxia ;Xia, Fangquan ;Tian, Dong ;Zhou, Changli ] Key Laboratory of Chemical Sensing and Analysis in Universities o 更多
摘要：ABSTRACT A new electrochemical sensor for determination of 2,4,6-trichlorophenol (2,4,6-TCP) was fabricated. The characterization of the sensor was studied by scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry techniques. The electrochemical behavior of 2,4,6-TCP was investigated using cyclic voltammetry and differential pulse voltammetry at the HS-β-cyclodextrin (HS-β-CD)/gold nanoparticles (AuNPs) composite modified indium tin oxide (ITO) electrode. The results showed that the current responses of 2,4,6-TCP greatly enhanced due to the high catalytic activity and enrichment capability of composites. The peak current of 2,4,6-TCP increases linearly with the increase of the 2,4,6-TCP concentration from 3.0 × 10-9to 2.8 × 10-8M, with the limit of detection of 1.0 × 10-9. Further more, the modified electrode was successfully applied to detect the level of 2,4,6-TCP in tap water samples with excellent sensitivity.
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