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Polysulfide/Graphene Nanocomposite Film for Simultaneous Electrochemical Determination of Cadmium and Lead Ions
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2018 (English)In: NANO, ISSN 1793-2920, Vol. 13, no 8, article id 1850090Article in journal (Refereed) Published
Abstract [en]

An integrative electroanalytical method was developed for detecting Cd2+ and Pb2+ ions in aqueous solutions. Polysulfide/graphene (RGO-S) nanocomposites were prepared and their performance as electrochemical sensors for Cd2+ and Pb2+ was evaluated. The RGO-S nanocomposite was carefully characterized by scanning electron microscopy with energy-dispersive X-ray spectrometry, transmission electron microscopy, and X-ray photoelectron spectroscopy. The as-prepared RGO-S was incorporated into a pyrolytic graphite electrode (RGO-S/PGE) and used for detecting trace amount of Cd2+ and Pb2+ by differential pulse anodic stripping voltammetry. Under optimal conditions, the stripping peak current of RGO-S/PGE varies linearly with heavy metal ion concentration in the ranges 2.0-300 mu g L-1 for Cd2+ and 1.0-300 mu g L-1 for Pb2+. The limits of detection for Cd2+ and Pb2+ were estimated to be about 0.67 mu g L-1 and 0.17 mu g L-1, respectively. The prepared electrochemical heavy-metal-detecting electrode provides good repeatability and reproducibility with high sensitivity, making it a suitable candidate for monitoring Cd2+ and Pb2+ concentrations in aqueous environmental samples.

Place, publisher, year, edition, pages
World Scientific, 2018. Vol. 13, no 8, article id 1850090
Keywords [en]
Graphene, polysulfide, Cd2+, Pb2+, simultaneous determination, sensor
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-151791DOI: 10.1142/S179329201850090XISI: 000443302800004OAI: oai:DiVA.org:umu-151791DiVA, id: diva2:1248236
Funder
Swedish Research Council, 2013-5252Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2018-09-14Bibliographically approved

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Wågberg, ThomasHu, Guangzhi

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