Fixure-reduce method for the synthesis of Cu2O/MWCNTs nanocomposites and its application as enzyme-free glucose sensor.
Cu(2)O/MWCNT (multi-walled carbon nanotubes) nanocomposites were successfully prepared in large quantities with a new fixure-reduction method under low temperature. The morphology and shape of the Cu(2)O/MWCNTs nanocomposites were characterized by field emission scanning electron microscopes (FESEMs), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD), respectively. Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of the Cu(2)O/MWCNTs nanocomposites modified electrode towards glucose. Compared to the bare GCE, the Cu(2)O nanoparticles and the MWCNTs modified electrode, the Cu(2)O/MWCNTs modified electrode displays high electrocatalytic activity towards the oxidation of glucose. With a potential of -0.20 V, the Cu(2)O/MWCNTs modified electrode was used to determine glucose by amperometric, showing significantly lower overvoltage and a linear dependence (R=0.9958) in the concentration up to 10 microM with a sensitivity of 6.53 microA micromol L(-1) and a detection limit of 0.05 micromol L(-1) (signal-to-noise ratio of 3). In summary, the preparation process of the nanocomposites is very simple and the nanocomposites could be used for the development of enzyme-free glucose sensor.
Zhang
Xiaojun
X
College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China. zhangxiaojun173@yahoo.com.cn
Wang
Guangfeng
G
Zhang
Wei
W
Wei
Yan
Y
Fang
Bin
B
D015374:Biosensing Techniques / Q000295:instrumentation*; D003300:Copper / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D004798:Enzymes / Q000737:chemistry; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005947:Glucose / Q000032:analysis*; D008420:Manufactured Materials; D036103:Nanotechnology / Q000295:instrumentation*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D014159:Transducers
D004798:Enzymes; D037742:Nanotubes, Carbon; D003300:Copper; D005947:Glucose; C030973:cupric oxide