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Electrochemical sensor for nitrobenzene based on carbon paste electrode modified with a poly(3,4-ethylenedioxythiophene) and carbon nanotube nanocomposite

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Abstract

A sensitive and selective electrochemical sensor for the determination of nitrobenzene (NB) was developed based on a carbon paste electrode (CPE) modified with a nanocomposite prepared from the conducting polymer poly(3,4-ethylenedioxythiophene) and carbon nanotubes. The modified CPE exhibits good conductivity, a large surface area, and excellent catalytic activity towards the electrochemical reduction of NB. Under optimal conditions, the modified CPE is capable of detecting NB in the 0.25 to 43 μM concentration range and with a detection limit at 83 nM. Moreover, the sensor is highly stable and reusable, and free of interferences by other commonly present nitro compounds. It was used to determine NB in wastewater samples.

A sensitive nitrobenzene sensor was developed based on the chemically synthesized nanocomposite composed of conducting polymer poly(3,4-ethylenedioxythiophene) and carbon nanotubes, which showed excellent catalytic activity towards the electrochemical reduction of nitrobenzene.

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Acknowledgments

This research was supported by the National Natural Science Foundation of China (No. 21275087), the Natural Science Foundation of Shandong Province of China (ZR2012BM008), and the Taishan Scholar Program of Shandong Province, China.

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Authors and Affiliations

  1. Shandong Provincial Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China

    Guiyun Xu, Beibei Li, Xin Wang & Xiliang Luo

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  1. Guiyun Xu
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  2. Beibei Li
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  3. Xin Wang
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  4. Xiliang Luo
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Correspondence to Xiliang Luo.

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Xu, G., Li, B., Wang, X. et al. Electrochemical sensor for nitrobenzene based on carbon paste electrode modified with a poly(3,4-ethylenedioxythiophene) and carbon nanotube nanocomposite. Microchim Acta 181, 463–469 (2014). https://doi.org/10.1007/s00604-013-1136-y

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  • DOI: https://doi.org/10.1007/s00604-013-1136-y

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