Journal
MICROCHEMICAL JOURNAL
Volume 150, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2019.104157
Keywords
Copper oxide; Dopamine; Electrochemically reduced graphene oxide; Biosensor
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Funding
- TUBITAK
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This study proposes a new approach for the electrochemical growth of Cu2O/CuO/electrochemically reduced graphene oxide (CuxO/ERGO) nanostructures based on simultaneous co-reduction of both copper ions, i.e. Cu (I) and Cu (II), and graphene oxide from an aqueous suspension on gold electrode. X-ray diffraction (XRD) spectra of the as-prepared CuxO/ERGO electrode show that CuO, Cu2O and graphene structures are composite nanostructures. Scanning electron microscopy (SEM) images show that CuxO/ERGO forms in different shapes (nanoflowers and nanocubes). Experimental results show that structures of CuxO/ERGO nanocomposite films can be easily controlled by application potential and experimental media. The resulting CuxO/ERGO nanocomposite electrodes exhibit good electrocatalytic activity towards dopamine sensing in the presence of ascorbic acid and could be used for biosensor applications [with low working potential (at approximately +0.2 V), high sensitivity (122.4 mu A cm(-2) mM(-1)) and low detection limit (12 x 10(-9) mol.L-1)].
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