Journal
ELECTROCHIMICA ACTA
Volume 167, Issue -, Pages 372-378Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.03.156
Keywords
2,4,6-trichlorophenol; modified electrode; HS-beta-cyclodextrin; gold nanoparticles
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Funding
- National Natural Science Foundation of China [21205048]
- Natural Science Foundation of Shandong Province, China [ZR2013BM003, ZR2009BM034]
- Science and Technology Development Plan Project of Shandong Province [2012G0022116]
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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-b-cyclodextrin (HS-beta-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 x 10(-9) to 2.8 x 10(-8) M, with the limit of detection of 1.0 x 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. (C) 2015 Elsevier Ltd. All rights reserved.
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