Journal
MATERIALS RESEARCH BULLETIN
Volume 98, Issue -, Pages 300-307Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.10.020
Keywords
Nickel nanoparticle; Graphene sheet; Graphene nanoribbon; Non-enzymatic glucose sensor; Amperometric
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A fast, highly sensitive and selective non-enzymatic electrochemical glucose sensor based on graphene sheet/ graphene nanoribbon/nickel nanoparticles (GS/GNR/Ni) hybrid material modified electrode was fabricated. The hybrid material was synthesized via facile in-situ chemical reduction and characterized by X-ray diffraction, transmission electron microscopy, Raman spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The GS/GNR/Ni/GCE showed high electrochemical activity towards the oxidation of glucose in a 0.1 M NaOH solution. At an applied potential of +0.5 V, it displayed wide linear amperometric response towards glucose from the range of 5 nM-5 mM, with a detection limit of 2.5 nM and sensitivity of 2.3 mA/mM cm(2). Moreover, the modified electrode was relatively insensitive to commonly interfering species such as dopamine, ascorbic acid, sucrose, uric acid and Cl- ions. The fabricated sensor with better reproducibility, good long term stability, makes it a promising electrode for the development of effective glucose sensor.
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