Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 634, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.127928
Keywords
Covalent organic framework; Electrochemical sensor; Ascorbic acid; Dopamine; Uric acid
Categories
Funding
- National Natural Science Foundation of China [21665024]
- Natural Science Foundation of Gansu Province [20JR10RA083]
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education
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A novel triazine-based covalent organic framework and its composite were successfully constructed by in situ growth of gold nanoparticles on its surface, followed by introduction of reduced graphene oxide. The constructed nanocomposite modified electrode exhibited excellent conductivity and catalytic activity, allowing for simultaneous detection of uric acid, dopamine, and ascorbic acid in urine samples accurately and rapidly.
In this work, a novel triazine-based covalent organic framework (TS-COF) was constructed by the condensation of 1, 3, 5-tris-(4-aminophenyl)triazine (TAPT) and squaric acid (SA) under solvothermal condition. By in situ growth of Au nanoparticles (AuNPs) on the surface of TS-COF, the AuNPs@TS-COF composite with enhanced electroactivity was prepared successfully. After introduction of reduced graphene oxide (RGO), the constructed AuNPs@TS-COF/RGO nanocomposite modified electrode exhibited excellent conductivity and outstanding cat-alytic activity, and could be employed to determine uric acid (UA), dopamine (DA) and ascorbic acid (AA) in urine sample simultaneously, accurately and rapidly with high sensitivity, good selectivity and high stability. The detection limits of UA, DA and AA were 0.07 mu M, 0.03 mu M and 4.30 mu M (S/N = 3), respectively.
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