Porous Polypyrrole/Graphene Oxide Functionalized with Carboxyl Composite for Electrochemical Sensor of Trace Cadmium (II)

Cadmium (II) sensing utilizing three-dimensional graphene/polypyrrole oxides was applied and evaluated for the environmentally relevant analytes. Driven by the need to detect trace Cd (II), we prepared a porous graphene oxide-polypyrrole (pGO/PPy) polymer nanocomposite modified sensor for electroche...

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Published in:Journal of the Electrochemical Society 2019-01, Vol.166 (2), p.B95-B102
Main Authors: Song, Yu, Bian, Chao, Hu, Jingfang, Li, Yang, Tong, Jianhua, Sun, Jizhou, Gao, Guowei, Xia, Shanhong
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cited_by cdi_FETCH-LOGICAL-c268t-c71ddc083dd81b5a97faa7cfb49b3481a5279c38b7b685a649d077ee003219fc3
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container_issue 2
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container_title Journal of the Electrochemical Society
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creator Song, Yu
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description Cadmium (II) sensing utilizing three-dimensional graphene/polypyrrole oxides was applied and evaluated for the environmentally relevant analytes. Driven by the need to detect trace Cd (II), we prepared a porous graphene oxide-polypyrrole (pGO/PPy) polymer nanocomposite modified sensor for electrochemical trace analysis of Cd (II). The pGO/PPy was prepared by polypyrrole wrapped with graphene oxide using ultrasound-assisted polymerization and graphene oxide functionalized with carboxyl, which was modified on the sensing electrode for pre-concentration and enhanced the absorption of heavy metal ions. Three-dimension graphene oxide and interconnected porous structure of polypyrrole were fabricated by electro-polymerization and sonication to enhance the pre-concentration factors and the sensitivity for cadmium determination. The cadmium sensor fabricated with pGO/PPy nanocomposite displayed a displayed a considerable sensitivity within the linear range from 1μg·L−1 to 100 μg·L−1, a detection limit of 0.05 μg·L−1 2-orders-lower cadmium than the WHO standard limit. The cadmium sensor could be applied in tap, pond and river water with a high selectivity minimizing electroactive, interfering ions.
doi_str_mv 10.1149/2.0801902jes
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The cadmium sensor fabricated with pGO/PPy nanocomposite displayed a displayed a considerable sensitivity within the linear range from 1μg·L−1 to 100 μg·L−1, a detection limit of 0.05 μg·L−1 2-orders-lower cadmium than the WHO standard limit. 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title Porous Polypyrrole/Graphene Oxide Functionalized with Carboxyl Composite for Electrochemical Sensor of Trace Cadmium (II)
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