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Published on: June 1, 2012
Non-Enzymatic Electrochemical Glucose Sensor Based on Ti-Cu-O Nanotubes Prepared from TiCu Amorphous Alloy
Shuai Zhang1, Feng Chen1, Yuchen Chi1
1School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Abstract:
Novel Ti-Cu-O nanotubes with the diameter of approximately 22 nm, the length of about 360 nm and the wall thickness of approximately 6 nm, were in-situ fabricated by one-step anodic oxidation of Ti60Cu40 amorphous alloy in the ethylene glycol containing F-. The Ti-Cu-O nanotubes exhibited superior electrocatalytic performance for glucose oxidation with an ultrahigh sensitivity of 403.9 μA cm-2 mM-1 in a linear range covering from 10 μM to 0.2 mM and low detection limit of 1.40 μM (at signal/noise ratio (S/N) = 3) at the potential of 0.6 V (vs. SCE). Moreover, the Ti-Cu-O nanotubes demonstrated a long-term stability and a good selectivity to uric acid and ascorbic acid. The superior catalytic performance of Ti-Cu-O nanotubes is attributed to the synergistic effect of Cu species existence in different valences and the tubular microstructure with large specific area. All results suggest that the Ti-Cu-O nanotubes could be potential materials for non-enzymatic glucose sensor.
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