In-situ growth of gold nanoparticles on a 3D-network consisting of a MoS2/rGO nanocomposite for simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid

A glassy carbon electrode was modified with a 3D-networked nanostructure composed of MoS 2 , reduced graphene oxide and gold nanoparticles (3D-MoS 2 /rGO/Au). The composites were prepared through in-situ growth of gold nanoparticles on 3D-MoS 2 /rGO nanosheets via a hydrothermal method. The morpholo...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2019-02, Vol.186 (2), p.92-92, Article 92
Main Authors: Zhao, Yanan, Zhou, Juan, Jia, Zimu, Huo, Danqun, Liu, Qingyan, Zhong, Dengqin, Hu, Yu, Yang, Mei, Bian, Minghong, Hou, Changjun
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Ascorbic acid
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Dopamine
Electric properties
Glassy carbon
Gold
Graphene
Growth
Microengineering
Molybdenum disulfide
Morphology
Nanochemistry
Nanocomposites
Nanoparticles
Nanotechnology
Original Paper
Oxidation
Particulate composites
Phenols
Quantitative analysis
Three dimensional composites
Uric acid
Vitamin C
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Summary:A glassy carbon electrode was modified with a 3D-networked nanostructure composed of MoS 2 , reduced graphene oxide and gold nanoparticles (3D-MoS 2 /rGO/Au). The composites were prepared through in-situ growth of gold nanoparticles on 3D-MoS 2 /rGO nanosheets via a hydrothermal method. The morphology and electrochemical features of the composite were investigated. The 3D-MoS 2 /rGO/Au sensor exhibits excellent electrocatalytic activity for simultaneous detection of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The oxidation potentials are well separated at around −0.05 V for AA, 0.06 V for DA and 0.2 V for UA, respectively. The detection limits for individual detection and simultaneous detection (S/ N  = 3) are 0.93 μM and 1.46 μM for AA, 0.11 μM and 0.15 μM for DA, and 0.74 μM and 0.29 μM for UA. The method was applied to the quantitative analysis of AA, DA, and UA in spiked serum samples with satisfying results. Graphical abstract In-situ growth of gold nanoparticles on 3D-networked MoS 2 /rGO nanocomposite for individual and simultaneous determination of ascorbic acid, dopamine and uric acid.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-018-3222-7