Surface modification prepared porous copper oxide/(Cu–S)n metal–organic framework/reduced graphene oxide hierarchical structure for highly selective electrochemical quercetin detection

Electrochemical alkalization of (Cu–S) n metal–organic framework (MOF) and graphene oxide ((Cu–S) n MOF/GO) composite yields a new CuO/(Cu–S) n MOF/RGO (reduced GO) composite with porous morphology on screen printed carbon electrode (SPCE) which facilitated the electron transfer properties in electr...

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Published in:Mikrochimica acta (1966) 2024-08, Vol.191 (8), p.471, Article 471
Main Authors: Velmurugan, Sethupathi, Tse, Man-Mo, Lin, Xiao-Yuan, Yu, Yuan-Hsiang, Cheng, Shu-Hua, Lu, Kuang-Lieh
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemical sensors
Chemistry
Chemistry and Materials Science
Copper
Copper oxides
Electron transfer
Graphene
Metal-organic frameworks
Microengineering
Nanochemistry
Nanotechnology
Original Paper
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Summary:Electrochemical alkalization of (Cu–S) n metal–organic framework (MOF) and graphene oxide ((Cu–S) n MOF/GO) composite yields a new CuO/(Cu–S) n MOF/RGO (reduced GO) composite with porous morphology on screen printed carbon electrode (SPCE) which facilitated the electron transfer properties in electrochemical quercetin (QUE) detection. A selective QUE detection ability has been demonstrated by the constructed electrochemical sensor (CuO/(Cu–S) n MOF/RGO/SPCE), which also has a broad dynamic range of 0.5 to 115 µM in pH 3 by differential pulse voltammetry. The detection limit is 0.083 µM (S/N = 3). In this study, it was  observed that the real samples contained 0.34 mg mL −1 and 27.7 µg g −1 QUE in wine and onion, respectively. Graphical Abstract
ISSN:0026-3672
1436-5073
1436-5073
DOI:10.1007/s00604-024-06544-5