Bismuth and nitrogen co-doped graphene oxide for efficient electrochemical sensing of Pb(II) by synergistic dual-site interaction

Carbon electrode materials have been widely explored with surface functionalization to find novel properties and electrochemical applications. The study reports ionic lead ($ Pb^{2+} $) detection over bismuth (Bi) and nitrogen (N) atomically co-doped graphene oxide (GO) flakes in an electrochemical...
Ausführliche Beschreibung

Carbon electrode materials have been widely explored with surface functionalization to find novel properties and electrochemical applications. The study reports ionic lead ($ Pb^{2+} $) detection over bismuth (Bi) and nitrogen (N) atomically co-doped graphene oxide (GO) flakes in an electrochemical sensor and their facile synthesis by a combined wet chemical and photochemical process. Both surface state and electronic transition manipulated by the heteroatom doping were characterized by spectroscopic analyses. The Bi- and N-added GO sensors exhibited a relatively higher sensitivity for the detection of $ Pb^{2+} $ ions in acetate buffer solution than the bare GO one as measured by square wave anodic stripping voltammetry (SWASV), and their stripping current and potential are dependent upon the dopant content. The Bi and N co-doped GO electrode showed a noticeable electrocatalytic activity toward $ Pb^{2+} $ detection compared with the singly Bi- and N-doped GO ones as measured by cyclic voltammetry (CV). Formation of electroactive Bi and N dual sites exerts a major influence on the adsorption of $ Pb^{2+} $ ions and deposition-stripping process, and their synergistic interaction in the electron transfer and catalysis is responsible for the remarkably enhanced sensing activity. The co-doped GO sensor reveals a linear dependence of the current response and peak potential on the $ Pb^{2+} $ concentration and offers sensitive assaying of $ Pb^{2+} $ ions with a quite low limit of detection (LOD) of 10.9 pM and low limit of quantification (LOQ) of 36.4 pM. Its analytical performance with good selectivity against several interfering ions and determination in tap water samples was acquired. Results demonstrate the feasibility of coupling metal with nonmetal co-dopants to tailor the electrical conduction and surface reactivity of the two-dimensional (2D) carbon materials toward efficient sensing operation. Graphical abstract Ausführliche Beschreibung

Autor*in:	Wang, Chien-Tsung [verfasserIn] Chen, Wei-Shen Fan, Keng-Hao Chiang, Chang-Yue Wu, Chin-Wei

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	Graphene oxide Electrochemical sensing Atomic doping Surface functionalization Dual-site mechanism

Anmerkung:

© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Übergeordnetes Werk:	Enthalten in: Journal of solid state electrochemistry - Berlin : Springer, 1997, 26(2022), 12 vom: 27. Aug., Seite 2699-2711
Übergeordnetes Werk:	volume:26 ; year:2022 ; number:12 ; day:27 ; month:08 ; pages:2699-2711

Links:	Volltext

DOI / URN:	10.1007/s10008-022-05277-w

Katalog-ID:	SPR048569585