Potassium-doped graphene for simultaneous determination of nitrite and sulfite in polluted water
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journal contribution
posted on 2024-06-18, 13:31 authored by XR Li, J Liu, FY Kong, XC Liu, JJ Xu, HY ChenPotassium (K) doping plays a critical role in adjusting the electronic properties of carbon materials. In this work, K-doped graphene, as a new electrode material, was used to modify glassy carbon electrode (GCE) for the simultaneous determination of nitrite (NO 2-) and sulfite (SO 32-) under neutral conditions. The advantages of K-doped graphene/GCE are illustrated from comparison with the graphene/GCE, K-doped multi-walled carbon nanotubes (MWNTs)/GCE, MWNTs/GCE, graphite/GCE and bare/GCE for electrocatalytic and sensing applications. It exhibited a linear response over the concentration range from 0.5 μM to 3.9 mM, with a detection limit of 0.2 μM (S/N = 3) for NO 2- and a corresponding linear range of 2.5 μM to 10.3 mM, with a detection limit of 1.0 μM (S/N = 3) for SO 32-. The proposed sensor could be successfully applied in the simultaneous detection of residual NO 2- and SO 32- in polluted water accurately and precisely. © 2012 Elsevier B.V. All rights reserved.
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Journal
Electrochemistry communicationsVolume
20Pagination
109-112Location
Amsterdam, The NetherlandsPublisher DOI
ISSN
1388-2481Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2012, Elsevier B.V.Issue
1Publisher
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