Electrochemical sensor based on an electrode modified with porous graphitic carbon nitride nanosheets (C3N4) embedded in graphene oxide for simultaneous determination of ascorbic acid, dopamine and uric acid

Two-dimensional porous graphitic carbon nitride (g-C 3 N 4 ) nanosheets were synthesized by low-cost and direct thermal oxidation. Porous g-C 3 N 4 assembled with graphene oxide (GO) was immobilized on a glassy carbon electrode. The sensor was applied to simultaneous determination of ascorbic acid (...

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Bibliographic Details
Published inMikrochimica acta (1966) Vol. 187; no. 2; p. 149
Main Authors Zhang, Lihui, Liu, Candi, Wang, Qiwen, Wang, Xiaohong, Wang, Shengtian
Format Journal Article
LanguageEnglish
Published Vienna Springer Vienna 01.02.2020
Springer
Subjects
Analytical Chemistry
Boron nitride
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Graphene
Graphite
Microengineering
Nanochemistry
Nanotechnology
Original Paper
Phenols
Sensors
Uric acid
Vitamin C
Simultaneous determination
2D nanomaterial
Porous g-C
Electrochemical sensor
N
Porous g-C3N4
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Summary:Two-dimensional porous graphitic carbon nitride (g-C 3 N 4 ) nanosheets were synthesized by low-cost and direct thermal oxidation. Porous g-C 3 N 4 assembled with graphene oxide (GO) was immobilized on a glassy carbon electrode. The sensor was applied to simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA) with high performance. Cyclic voltammetry and differential pulse voltammetry were used to investigate electrochemical and electrocatalytic properties. The results indicate that the electrochemical sensor possesses high specific surface area, hierarchical pore structure and excellent signal response to AA, DA and UA. The oxidation potentials are well separated at around 0.15, 0.34 and 0.46 V for AA, DA and UA respectively. The determination limits for AA, DA and UA are 3.7 μM, 0.07 μM and 0.43 μM, respectively. The sensor was applied to tracking the three analytes in spiked serum samples with recovery 95.1~105.5% and relation standard deviations of less than 5%. Graphical abstract Schematic representation of porous graphitic carbon nitride nanosheet embedded in graphene oxide for simultaneous determination of ascorbic acid, dopamine and uric acid.
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ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-019-4081-6