Determination of 4-aminophenylarsonic acid using a glassy carbon electrode modified with an ionic liquid and carbon nanohorns

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• 作者：Hong Dai ; Lingshan Gong ; Shuangyan Lu ; Qingrong Zhang ; Yilin Li…
• 关键词：4 ; aminophenylarsonic acid ; Carbon nanohorns ; Ionic liquid ; Electrochemistry
• 刊名：Microchimica Acta
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：182
• 期：7-8
• 页码：1247-1254
• 全文大小：786 KB
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• 作者单位：Hong Dai (1)
  Lingshan Gong (1)
  Shuangyan Lu (1)
  Qingrong Zhang (1)
  Yilin Li (1)
  Shupei Zhang (1)
  Guifang Xu (1)
  Xiuhua Li (1)
  Yanyu Lin (1) (2)
  Guonan Chen (2)
  
  1. College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian, 350108, China
  2. Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350002, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

We have developed a sensor for 4-aminophenylarsonic acid (4-APhAA) by coating a glassy carbon electrode (GCE) with a composite prepared from an ionic liquid and dahlia-like carbon nanohorns (CNHs). The good electric conductivity, large surface area and high pore volume of the CNHs, and the synergistic action of the ionic liquid (which is a good dispersant with excellent ion conductivity) result in efficient electrocatalysis towards oxidation of 4-APhAA. The effect was investigated by various electrochemical methods, and the electron transfer coefficient, diffusion coefficient, standard heterogeneous rate constant and thermodynamic activation energy were determined. The response range of 4-APhAA was evaluated using an i-t plot. If operated at a working voltage of 900?mV (vs Ag/AgCl), the sensor responds to 4-APhAA over the 0.5?μM to 3.5?M concentration range.