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| Electrocatalytic response of poly(cobalt tetraaminophthalocyanine)/ multi-walled carbon nanotubes-Nafion modified electrode toward sulfadiazine in urine |
| Xiao-ping Hong, Yan Zhu, Yan-zhen Zhang |
| Department of Chemistry, Zhejiang University, Hangzhou 310028, China; Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China; Department of Stomatology, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China |
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Abstract A highly sensitive amperometric sulfadiazine sensor fabricated by electrochemical deposition of poly(cobalt tetraaminophthalocyanine) (poly(CoIITAPc)) on the surface of a multi-walled carbon nanotubes-Nafion (MWCNTs-Nafion) modified electrode is described. This electrode showed a very attractive performance by combining the advantages of CoIITAPc, MWCNTs, and Nafion. Compared with the bare glassy carbon electrode (GCE) and the MWCNTs-Nafion modified electrode, the electrocatalytic activity of poly(CoIITAPc)-coated MWCNTs-Nafion GCE generated greatly improved electrochemical detections toward sulfadiazine including low oxidation potential, high current responses, and good anti-fouling performance. The oxidation peak currents of sulfadiazine obtained on the new modified electrode increased linearly while increasing the concentration of sulfadiazine from 0.5 to 43.5 μmol/L with the detection limit of 0.17 μmol/L.
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Received: 31 October 2011
Published: 06 June 2012
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