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Selective voltammetric determination of Cd(II) by using N,S-codoped porous carbon nanofibers
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2018 (English)In: Microchimica Acta, ISSN 0026-3672, E-ISSN 1436-5073, Vol. 185, article id 282Article in journal (Refereed) Published
Abstract [en]

Porous carbon nanofibers codoped with nitrogen and sulfur (NFs) were prepared by pyrolysis of trithiocyanuric acid, silica nanospheres and polyacrylonitrile (PAN) followed by electrospinning. The NFs were used to modify a glassy carbon electrode (GCE) which then displayed highly sensitive response to traces of Cd(II). Compared to a bare GCE and a Nafion modified GCE, the GCE modified with codoped NFs shows improved sensitivity for Cd(II) in differential pulse anodic sweep voltammetry. The stripping peak current (typically measured at 0.81 V vs. Ag/AgCl) increases linearly in the 2.0–500 μg·L−1 Cd(II) concentration range. This is attributed to the large surface area (109 m2·g−1), porous structure, and high fraction of heteroatoms (19 at.% of N and 0.75 at.% of S). The method was applied to the determination of Cd(II) in (spiked) tap water where it gave recoveries that ranged between 96% and 103%.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 185, article id 282
Keywords [en]
Electrospinning, Differential pulse anodic sweep voltammetry, Electrochemical sensor, ectroanalysis, Heavy metals, Tap water analysis
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-148012DOI: 10.1007/s00604-018-2818-2ISI: 000431825600002PubMedID: 29730768OAI: oai:DiVA.org:umu-148012DiVA, id: diva2:1211404
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-06-09Bibliographically approved

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Wågberg, ThomasHu, Guangzhi

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