Prussian Blue electrodeposited on MWNTs-PANI hybrid composites for H(2)O(2) detection

Yongjin Zou; Lixian Sun; Fen Xu

doi:10.1016/j.talanta.2006.11.001

Prussian Blue electrodeposited on MWNTs-PANI hybrid composites for H(2)O(2) detection

Talanta. 2007 Apr 30;72(2):437-42. doi: 10.1016/j.talanta.2006.11.001. Epub 2006 Nov 28.

Authors

Yongjin Zou¹, Lixian Sun, Fen Xu

Affiliation

¹ Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, China.

PMID: 19071637
DOI: 10.1016/j.talanta.2006.11.001

Abstract

A Prussian Blue (PB)/polyaniline (PANI)/multi-walled carbon nanotubes (MWNTs) composite film was fabricated by step-by-step electrodeposition on glassy carbon electrode (GCE). The electrode prepared exhibits enhanced electrocatalytic behavior and good stability for detection of H(2)O(2) at an applied potential of 0.0V. The effects of MWNTs thickness, electrodeposition time of PANI and rotating rate on the current response of the composite modified electrode toward H(2)O(2) were optimized to obtain the maximal sensitivity. A linear range from 8x10(-9) to 5x10(-6)M for H(2)O(2) detection has been observed at the PB/PANI/MWNTs modified GCE with a correlation coefficient of 0.997. The detection limit is 5x10(-9)M on signal-to-noise ratio of 3. To the best of our knowledge, this is the lowest detection limit for H(2)O(2) detection. The electrode also shows high sensitivity (526.43muAmuM(-1)cm(-2)) for H(2)O(2) detection which is more than three orders of magnitude higher than the reported.