Preparation of cobalt-tetraphenylporphyrin/reduced graphene oxide nanocomposite and its application on hydrogen peroxide biosensor

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• 作者：Longzhen Zheng ; ^{zlz@ecjtu.jx.cn} ; Dan Ye ; Leyan Xiong ; Jingpeng Xu ; Kun Tao ; Zhijun Zou ; Danlin Huang ; Xiaowei Kang ; Shaoming Yang ; Jian Xia
• 关键词：Cobalt-tetraphenylporphyrin ; Reduced graphene oxide ; Nanocomposite ; Hydrogen peroxide biosensor ; Anti-interfering ability
• 刊名：Analytica Chimica Acta
• 出版年：2013
• 出版时间：20 March, 2013
• 年：2013
• 卷：768
• 期：Complete
• 页码：69-75
• 全文大小：1102 K

文摘

A novel cobalt-tetraphenylporphyrin/reduced graphene oxide (CoTPP/RGO) nanocomposite was prepared by a ¦Ð-¦Ð stacking interaction and characterized by ultraviolet-visible absorption spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR) and electrochemical impedance spectroscopy (EIS). The CoTPP/RGO nanocomposite exhibited high electrocatalytic activity both for oxidation and reduction of H₂O₂. The current response was linear to H₂O₂ concentration with the concentration range from 1.0 ¡Á 10^?7 to 2.4 ¡Á 10^?3 mol L^?1 (R = 0.998) at the reductive potential of ?0.20 V and from 1.0 ¡Á 10^?7 to 4.6 ¡Á 10^?4 mol L^?1 (R = 0.996) at the oxidative potential of +0.50 V. The H₂O₂ biosensor showed good anti-interfering ability towards oxidative interferences at the oxidative potential of +0.50 V and good anti-interfering ability towards reductive interferences at the reductive potential of ?0.20 V.