Electrochemical detection of sulfanilamide using tannic acid exfoliated MoS 2 nanosheets combined with reduced graphene oxide/graphite.

Autor: Luo Y; Department of Chemistry, Maynooth University, Co. Kildare, Ireland. Electronic address: Yiran.Luo.2023@mumail.ie., Barwa TN; Department of Chemistry, Maynooth University, Co. Kildare, Ireland., Dempsey E; Department of Chemistry, Maynooth University, Co. Kildare, Ireland; Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland., Karthik R; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea., Shim JJ; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea., Sukanya R; Department of Chemistry, Maynooth University, Co. Kildare, Ireland., Breslin CB; Department of Chemistry, Maynooth University, Co. Kildare, Ireland; Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland. Electronic address: Carmel.Breslin@mu.ie.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 May 01; Vol. 248, pp. 118391. Date of Electronic Publication: 2024 Feb 01.
DOI: 10.1016/j.envres.2024.118391
Abstrakt: Sulfonamides are a family of synthetic drugs with a broad-spectrum of antimicrobial activity. Like other antimicrobials, they have been found in aquatic environments, making their detection important. Herein, an electrochemical sensor was designed using tannic acid exfoliated few-layered MoS 2 sheets, which were combined with a mixture of reduced graphene oxide (rGO) and graphite flakes (G). The rGO/G was formed using electrodeposition, by cycling from -0.5 to -1.5 V in an acidified sulfate solution with well dispersed GO and G. The exfoliated MoS 2 sheets were drop cast over the wrinkled rGO/G surface to form the final sensor, GCE/rGO/G/ta-MoS 2 . The mixture of rGO/G was superior to pure rGO in formulating the sensor. The fabricated sensor exhibited an extended linear range from 0.1 to 566 μM, with a LOD of 86 nM, with good selectivity in the presence of various salts found in water and structurally related drugs from the sulfonamide family. The sensor showed very good reproducibility with the RSD at 0.48 %, repeatability and acceptable long term stability over a 10-day period. Good recovery from both tap and river water was achieved, with recovery ranging from 90.4 to 98.9 % for tap water and from 83.5 to 94.4 % for real river water samples.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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