The Effects of Electroplating Conditions on the Morphology and Glucose Oxidation Performance of Cu2O/TiO2

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A series of Cu2O/TiO2 electrodes for the enzyme-free glucose oxidation have been fabricated by secondary anodic oxidation combined electroplating method. The obtained nanocomposites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and their electrochemical behaviour measured by cyclic voltammetry (CV). The effects of preparation conditions on the morphology and performance of Cu2O/TiO2 for enzyme-free oxidaton of glucose were studied. For the electrochemical deposition at the potential range of −0.4 to −0.8 V, Cu2+ was electrochemically reduced to polyhedral Cu2O, accompanied by the simultaneous formation of Cu with a nanoparticle morphology. It was found that the reduced particles with Cu cooperated onto the Cu2O were completely covered on the top surface of TiO2 nanotubes and showed a highest response current with a lower overpotential 0.5 V. The results indicate that the incorporation of Cu nanoparticles favors to improve the response current, which might find promising applications in biosensor and biological fuel cells.

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3-8

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May 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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