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Stripping Voltammetric Determination of Lead in Coastal Waters With a Functional Micro-Needle Electrode by Han, Haitao; Pan, Dawei; Li, Ying; Wang, Jie; Wang, Chenchen is a Environmental Science article available to read on EtoBox.

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In this work, for the voltammetric determination of lead (Pb) in coastal waters, a novel functional micro-needle electrode based on 3D reduced graphene oxide/flowerlike bismuth nanosheets (3DrGO/F-BiNSs) was fabricated. The micro-needle electrode was prepared with the commercial acupuncture needle (ANE) and functionalized with 3DrGO/F-BiNSs through stepwise electrodeposition method. The sensing surface (needle tip) of the micro-needle electrode was first modified with 3DrGO to enhance the conductivity and provide more active sites to combine Bi nanomaterials. Then the F-BiNSs were electrodeposited on the 3DrGO surface to facilitate the electrochemical voltammetric response of Pb 2+ due to their excellent combining ability with Pb. The physical and electrochemical properties of the as-prepared 3DrGO/F-BiNSs/ANE were characterized by different techniques including scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), and electrochemical methods. The 3DrGO/F-BiNSs/ANE exhibited an excellent performance for the voltammetric determination of Pb 2+ with the linear range of 40 to 600 nmol L -1 and detection limit of 12.5 nmol L -1 . Additionally, the application

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Author

Han, Haitao; Pan, Dawei; Li, Ying; Wang, Jie; Wang, Chenchen

Publisher

Frontiers Media SA; Frontiers Media S.A.; Lausanne: Frontiers Media S.A., 2014- (ISSN 2296-7745)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)