Journal
ELECTROCHIMICA ACTA
Volume 153, Issue -, Pages 352-360Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.11.202
Keywords
Copper nanostructures; Graphene oxide; Electrochemical sensor; 2-Naphthol
Categories
Funding
- National Natural Science Foundation of China [21171174, 21461004]
- Provincial Natural Science Foundation of Hunan [09JJ3024, 13JJ3112]
- Scientific Research Project of Education Department of Hunan Province [14C0168, 13K105, 14A021]
- Provincial Environmental Science and Technology Foundation of Hunan
- Opening Subjects of State Key Laboratory of Powder Metallurgy and Province Key Laboratory of Functional Metal Organic Materials [GN14K03]
- Open-end Fund for the Valuable and Precision Instruments of Central South University
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A copper nanostructures-graphene oxide (Cu/GO) hybrid as a new electrocatalyst for highly sensitive detection of 2-naphthol (2-NAP) was successfully synthesized by a one-pot and in situ chemical reduction approach. The characterization results reveal that the cubic Cu nanostructures are tightly attached onto the GO sheets in the resulting hybrid. A lower oxidation potential and a larger peak current were observed for the 2-NAP oxidation at the Cu/GO modified electrode, demonstrating the synergistic electrocatalysis from Cu nanostructures and GO sheets. Consequently, the Cu/GO hybrid exhibits a low detection limit (5.0 nM) and wide linear ranges (0.1-4.0 mu M and 4.0-130.0 mu M) when used as a sensing material for the sensitive detection of 2-NAP. Finally, the fabricated sensor was successfully applied in the detection of 2-NAP in real samples and satisfactory recoveries in the range of 99.3%-104.0% were achieved. (C) 2014 Elsevier Ltd. All rights reserved.
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