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Mesoporous Graphene‐Modified Electrode for Independent and Selective Detection of Dopamine in the Presence of High Concentration of Ascorbic Acid
Author(s) -
Nankya Rosalynn,
Opar David O.,
Jung Hyun
Publication year - 2020
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11947
Subject(s) - ascorbic acid , graphene , differential pulse voltammetry , cyclic voltammetry , detection limit , materials science , mesoporous material , raman spectroscopy , electrochemical gas sensor , electrode , scanning electron microscope , analytical chemistry (journal) , electrochemistry , inorganic chemistry , chemistry , nanotechnology , chromatography , organic chemistry , catalysis , physics , food science , optics , composite material
Mesoporous graphene (MG) synthesized via a facile hydrothermal method using soft‐template, triblock copolymer P123 and graphene oxide was utilized for the detection of dopamine (DA) in the presence of ascorbic acid (AA). The structure and morphology of the obtained MG were analyzed by X‐ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy, high‐resolution transmission electron microscopy, and nitrogen adsorption–desorption isotherms. The obtained MG was dispersed in DMF solution and then drop‐casted on to a platinum plate. It was primarily tested for electrochemical sensing of biomolecules. Cyclic voltammetry and differential pulse voltammetry (DPV) were used to evaluate the electrochemical behaviors of MG on a platinum electrode. DPV facilitated selective and sensitive detection of DA in the presence of a high concentration of AA. MG showed a faster electron transfer rate and increased current density. It exhibited good sensitivity, selectivity, and a linear relationship with concentration, with a 7 μM limit of detection, suggesting that MG is a promising material for electrochemical sensing applications.