High-performance electrochemical amperometric sensors for the sensitive determination of phenyl urea herbicides diuron and fenuron

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• 作者：Veerappan Mani ; Rajkumar Devasenathipathy ; Shen-Ming Chen ; Tzu-Ying Wu…
• 关键词：Graphene oxide ; Multiwalled carbon nanotubes ; Herbicides ; Diuron ; Electrochemical sensor ; Electrocatalysis
• 刊名：Ionics
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：21
• 期：9
• 页码：2675-2683
• 全文大小：1,390 KB
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• 作者单位：Veerappan Mani (1)
  Rajkumar Devasenathipathy (1)
  Shen-Ming Chen (1)
  Tzu-Ying Wu (1)
  K. Kohilarani (2)
  
  1. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei, 106, Taiwan, ROC
  2. Post Graduate and Research Department of Chemistry, Thiagarajar College, Madurai, Tamil Nadu, 625009, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760

文摘

We have described the fabrication of high-performance amperometric sensors derived from graphene oxide–multiwalled carbon nanotube (GO–MWCNT) composite for the sensitive determination of diuron and fenuron. GO–MWCNT composite was prepared by simple solution-based approach, and its formation was confirmed by scanning electron microscopy, transmission electron microscopy and UV-visible spectroscopy methods. GO–MWCNT film-modified glassy carbon electrode exhibited excellent electrocatalytic performance in the oxidation of diuron and fenuron in terms of less overpotential and highly enhanced peak currents. GO–MWCNTs have presented significantly improved electrocatalytic performance than dimethylformamide-dispersed MWCNTs. GO–MWCNT-based amperometric sensor has been fabricated which detects diuron in wide linear range between 9 μM and 0.38 mM with high sensitivity of 0.645 μA μM? cm?. The amperometric sensor also detects fenuron in broad linear range between 0.9 and 47 μM with sensitivity of 1.20 μA μM? cm?. Moreover, the sensor offers appreciable repeatability, reproducibility, and stability results. Practical feasibility of the prepared amperometric sensor has been assessed in various water samples collected from agricultural areas. Keywords Graphene oxide Multiwalled carbon nanotubes Herbicides Diuron Electrochemical sensor Electrocatalysis