Abstract
We report on a non-enzymatic amperometric sensor for hydrogen peroxide (H2O2). It was fabricated by electrodeposition of multi-wall carbon nanotubes and polyaniline along with platinum nanoparticles on the surface of a glassy carbon electrode. The modification was probed by scanning electron microscopy and cyclic voltammetry. The resulting sensor exhibits a high sensitivity (748.4 μA·mM−1·cm−2), a wide linear range (7.0 μM–2.5 mM), a low detection limit (2.0 μM) (S/N = 3), a short response time (>5 s), and long-term stability, and is not interfered by common species. It was successfully applied to determine H2O2 in disinfectants.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (21075100), the Ministry of Education of China (project 708073), the 211 Project of Southwest University (the Third Term), the Natural Science Foundation of Chongqing City (CSTC-2009BA1003), China and High Technology Project Foundation of Southwest University (XSGX 02), China.
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Fig. 1S
Influences of electropolymerization cycles of MWCNTs-PANI nanocomposites on the respond of the modified electrode (DOC 63 kb)
Fig. 2S
Influence of electrodeposition time of Pt nanoparticles on the respond of the modified electrode (DOC 43 kb)
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Zhong, H., Yuan, R., Chai, Y. et al. Non-enzymatic hydrogen peroxide amperometric sensor based on a glassy carbon electrode modified with an MWCNT/polyaniline composite film and platinum nanoparticles. Microchim Acta 176, 389–395 (2012). https://doi.org/10.1007/s00604-011-0731-z
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DOI: https://doi.org/10.1007/s00604-011-0731-z