Microchimica Acta

, Volume 170, Issue 3–4, pp 307–312

A sensitive mercury (II) sensor based on CuO nanoshuttles/poly(thionine) modified glassy carbon electrode

Original Paper

Abstract

Shuttle-like copper oxide (CuO) was prepared by a hydrothermal decomposition process. The resulting material was characterized by scanning electron microscopy and X-ray diffraction. It was then immobilized on the surface of a glassy carbon electrode modified with a film of poly(thionine). A pair of well-defined and reversible redox peaks for Hg(II) was observed with the resulting electrode in pH 7.0 solutions. The anodic and cathodic peak potentials occurred at 0.260 V and 0.220 V (vs. Ag/AgCl), respectively. The modified electrode displayed excellent amperometric response to Hg(II), with a linear range from 40 nM to 5.0 mM and a detection limit of 8.5 nM at a signal-to-noise ratio of 3. The sensor exhibited high selectivity and reproducibility and was successfully applied to the determination of Hg(II) in water samples.

Keywords

CuO nanoshuttle Hg2+ Poly(thionine) Sensor 

Supplementary material

604_2010_359_MOESM1_ESM.doc (746 kb)
ESM 1(DOC 746 kb)

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Anhui Key Laboratory of chemo-Biosening, College of Chemistry and Materials ScienceAnhui Normal UniversityWuhuPeople’s Republic of China

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