Assembling reduced graphene oxide with sulfur/nitrogen- "hooks" for electrochemical determination of Hg(II).

Autor: Bi CC; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China; School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China., Ke XX; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China; School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China., Chen X; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China; School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China; School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, PR China. Electronic address: xingchen@hfut.edu.cn., Weerasooriya R; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China; National Institute of Fundamental Studies, Kandy, 20000, Sri Lanka., Hong ZY; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China., Wang LC; School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China. Electronic address: hfutwlc@163.com., Wu YC; Key Lab of Aerospace Structural Parts Forming Technology and Equipment of Anhui Province, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009, PR China; School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2020 Mar 01; Vol. 1100, pp. 31-39. Date of Electronic Publication: 2019 Nov 27.
DOI: 10.1016/j.aca.2019.11.062
Abstrakt: Herein the sulfur/nitrogen contained groups, serving as the "hooks" for electrochemical determination of Hg(II), were assembled on the reduced graphene oxide (hereafter SN-rGO) via a one-step facile hydrothermal method. The thiourea acts as a precursor for sulfur/nitrogen doping and partial reduction of graphene oxide. The SN-rGO was used to modify the glassy carbon electrode (GCE) for electrochemical detection of Hg(II) by square wave anodic stripping voltammetry (SWASV). The sulfur/nitrogen doping significantly improves the Hg(II) complexation by SN-rGO due to the creation of multifunctional groups on the graphene nanosheet. The SN-rGO modified electrode has excellent sensitivity (20.48 μA/μM) and limit of detection (LOD 8.93 nM) for Hg(II) detection. The newly developed Hg(II) sensing electrode possesses minimal interference for other ions typically found in natural waters. Therefore, it can be used for routine water quality monitoring. The fabrication of the SN-rGO electrode is rapid and low cost; hence, it offers a potential platform for environmental monitoring of toxic metal ions.
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 © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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