Simultaneous and selective determination of dopamine and tyrosine in the presence of uric acid with 2D-MoS2 nanosheets modified screen-printed carbon electrodes

被引：25

作者：

Zribi, Rayhane ^{[1
,2
]}

Maalej, Ramzi ^{[1
]}

Gillibert, Raymond ^{[3
,4
]}

Donato, Maria G. ^{[3
]}

Gucciardi, Pietro G. ^{[3
]}

Leonardi, Salvatore G. ^{[2
]}

Neri, Giovanni ^{[2
]}

机构：

[1] Univ Sfax, Fac Sci Sfax, Georesources Mat Environm & Global Changes Lab GE, Sfax, Tunisia

[2] Univ Messina, Dept Engn, I-98166 Messina, Italy

[3] CNR IPCF Ist & Proc Chimicofis, Viale F Stagno Alcontres 37, I-98156 Messina, Italy

[4] Univ Roma La Sapienza, Dipartimento Fis, Piazzale A Moro 2, I-00185 Rome, Italy

来源：

FLATCHEM | 2020年 / 24卷

关键词：

Molybdenum disulphide nanosheets; Electrochemical sensors; Dopamine; Uric acid; Tyrosine; TRANSITION-METAL DICHALCOGENIDES; VOLTAMMETRIC DETERMINATION; ELECTROCHEMICAL DETERMINATION; ASCORBIC-ACID; MONOLAYER; GRAPHENE; SENSOR; BULK;

D O I：

10.1016/j.flatc.2020.100187

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-dimensional molybdenum disulphide nanosheets (2D-MoS2) were prepared by liquid-phase exfoliation and used to modify screen-printed carbon electrodes (SPCE), in order to develop an electrochemical sensor for the simultaneous determination of dopamine (DA) and tyrosine (Tyr) in presence of uric acid (UA). To demonstrate the layered morphology, the synthesized molybdenum disulphide nanostructures, have been characterized by Raman and SEM in both liquid dispersion and after deposition on SPCE. The performances of the 2D-MoS2-SPCE electrode have been tested and optimized in terms of sensitivity, reaching high sensitivity values of 1044 mu A mM(-1) cm(-2) for DA and 321 mu A mM(-1) cm(-2) for Tyr, selectivity against UA and high stability. The simultaneous detection of these biomolecules is the first study so far reported with the use of 2D-MoS2-based sensors. The promising characteristics of the developed electrodes suggest 2D-MoS2 as a versatile, low cost and easy to produce material for the next generation of electrochemical sensors of a variety of important biomolecules.

引用

页数：9

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