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Ultrasonic‐electrodeposition of Flower‐like Graphene Nanosheets in Ionic Liquid and Its Sensing for Ascorbic Acid
Author(s) -
Sheng Qinglin,
He Yaping,
Zhang Dawei,
Zheng Jianbin
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201200270
Subject(s) - ascorbic acid , chemistry , ionic liquid , graphene , nanosheet , amperometry , raman spectroscopy , detection limit , electrolyte , fourier transform infrared spectroscopy , analytical chemistry (journal) , scanning electron microscope , electrochemistry , electrode , chemical engineering , inorganic chemistry , nanotechnology , chromatography , organic chemistry , materials science , catalysis , optics , physics , food science , composite material , engineering
Choline chloride–based ionic liquid Ethaline were employed as the supporting electrolyte, graphene (GE) nanosheet was prepared with ultrasonic wave assisted electrodeposition for the first time. Scanning electron microscope results indicated that flower‐like GE nanosheets were obtained at the electrode surface. Energy dispersive X–ray spectroscopy, Fourier transform infrared spectra and Raman spectra were used to characterize the composition of the flower‐like GE nanosheets. Electrochemical methods showed that the flower‐like GE nanosheets based sensor exhibited high electrocatalytic activity for ascorbic acid (AA) oxidation and can be potentially used for the sensitive amperometric sensing of AA. Amperometric experiments showed that the sensor displayed broad linearity from 0.25 μM to 2.0 mM with a relative low detection limit of 0.1 μM (S/N = 3).