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Disposable graphene sensor with an internal reference electrode for stripping analysis of heavy metals

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Abstract

In this study, a low-cost disposable graphene sensor was fabricated for detecting heavy metals such as Cd2+, Pb2+ and Cu2+ by the anodic stripping voltammetry method (ASV). Vacuum compacted graphene films were used as the three electrodes, and they showed excellent conductivity and low noise signals. A big advantage was the simple fabrication process of graphene films without any binder. Furthermore, a ferrocene-based internal reference was introduced in the working electrode. The analytes were recognized by the relative distances of the stripping potential peaks between the working electrode and internal reference electrode. Finally, the all-graphene-based sensor was successfully built for the electrochemical analysis and then applied for determination of heavy metals in real river-water samples.

Graphical abstract: Disposable graphene sensor with an internal reference electrode for stripping analysis of heavy metals

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Publication details

The article was received on 30 Jan 2018, accepted on 30 Mar 2018 and first published on 03 Apr 2018


Article type: Paper
DOI: 10.1039/C8AY00221E
Citation: Anal. Methods, 2018, Advance Article
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    Disposable graphene sensor with an internal reference electrode for stripping analysis of heavy metals

    S. Liu, T. Wu, F. Li, Q. Zhang, X. Dong and L. Niu, Anal. Methods, 2018, Advance Article , DOI: 10.1039/C8AY00221E

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