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Ultra-sensitive electrochemical sensor based on in situ grown ultrafine HKUST-1 nanoparticles @ graphite nanosheets and core–shell structured MoO3-polypyrrole nanowires for the detection of rutin in orange juice.

Authors :
Wang, Yuefan
Chen, Yinzhi
Zhou, Yuhe
Wang, Yilin
Wu, Yingjie
Xie, Yixi
Zhao, Pengcheng
Hu, Xiayi
Fei, Junjie
Source :
Microchimica Acta. Jul2024, Vol. 191 Issue 7, p1-13. 13p.
Publication Year :
2024

Abstract

Rutin extracted from natural plants has important medical value, so developing accurate and sensitive quantitative detection methods is one of the most important tasks. In this work, HKUST-1@GN/MoO3-Ppy NWs were utilized to develop a high-performance rutin electrochemical sensor in virtue of its high conductivity and electrocatalytic activity. The morphology, crystal structure, and chemical element composition of the fabricated sensor composites were characterized by SEM, TEM, XPS, and XRD. Electrochemical techniques including EIS, CV, and DPV were used to investigate the electrocatalytic properties of the prepared materials. The electrochemical test conditions were optimized to achieve efficient detection of rutin. The 2-electron 2-proton mechanism, consisting of several rapid and sequential phases, is postulated to occur during rutin oxidation. The results show that HKUST-1@GN/MoO3-Ppy NWs have the characteristics of large specific surface area, excellent conductivity, and outstanding electrocatalytic ability. There is a significant linear relationship between rutin concentration and the oxidation peak current of DPV. The linear range is 0.50–2000 nM, and the limit of detection is 0.27 nM (S/N = 3). In addition, the prepared electrode has been confirmed to be useful for rutin analysis in orange juice. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00263672
Volume :
191
Issue :
7
Database :
Academic Search Index
Journal :
Microchimica Acta
Publication Type :
Academic Journal
Accession number :
178504194
Full Text :
https://doi.org/10.1007/s00604-024-06417-x