Journal
TALANTA
Volume 213, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2020.120843
Keywords
TAPB-DMTP-COFs; Magnetic nanoparticles; Luteolin; Electrochemical sensor
Categories
Funding
- National Natural Science Foundation of China [21205103]
- Jiangsu Provincial Nature Foundation of China [BK2012258]
- Young and Middle-aged Academic Leaders Foundation of Yangzhou University
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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In this work, a novel core-shell structured magnetic covalent organic frameworks (denoted as Fe3O4@TAPB-DMTP-COFs (TAPB, 1,3,5-tris(4-aminophenyl)benzene; DMTP, 2,5-dimethoxyterephaldehyde) was fabricated via a facile step-by-step assembly approach. The resulting material was characterized by transmission electron microscopy, powder X-ray diffraction, Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy and voltammetric methods. Fe3O4@TAPB-DMTP-COFs was further coated on the surface of glassy carbon electrode to construct an electrochemical sensor for the determination of luteolin. TAPB-DMTP-COFs with highly ordered porous structure not only provide more active sites, but also avoid the aggregation of Fe3O4. Meanwhile, Fe3O4 magnetic nanoparticles can obviously accelerate the electron transport. Under the optimal conditions, the method displayed low detection limit (0.0072 mu mol L-1), wide linear range (0.010-70 mu mol L-1), and good recoveries (98.5-102.0%). Moreover, there are no significant effects from the interferents. The feasibility of this method was applied to trace luteolin in chrysanthemum tea and carrot. We consider this COFs-based porous material would become one of the most promising materials in electrochemical sensor.
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