title: Preparation of cobalt-tetraphenylporphyrin/reduced graphene oxide nanocomposite and its application on hydrogen peroxide biosensor.
abstract: A novel cobalt-tetraphenylporphyrin/reduced graphene oxide (CoTPP/RGO) nanocomposite was prepared by a π-π 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 1.0×10(-7) to 2.4×10(-3)molL(-1) (R=0.998) at the reductive potential of -0.20V and from 1.0×10(-7) to 4.6×10(-4)molL(-1) (R=0.996) at the oxidative potential of +0.50V. The H2O2 biosensor showed good anti-interfering ability towards oxidative interferences at the oxidative potential of +0.50V and good anti-interfering ability towards reductive interferences at the reductive potential of -0.20V.
authors.affiliation: Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang, Jiangxi 330013, PR China. zlz@ecjtu.jx.cn
authors.forename: Longzhen
authors.initials: L
authors.lastname: Zheng
authors.forename: Dan
authors.initials: D
authors.lastname: Ye
authors.forename: Leyan
authors.initials: L
authors.lastname: Xiong
authors.forename: Jingpeng
authors.initials: J
authors.lastname: Xu
authors.forename: Kun
authors.initials: K
authors.lastname: Tao
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Zou
authors.forename: Danlin
authors.initials: D
authors.lastname: Huang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Kang
authors.forename: Shaoming
authors.initials: S
authors.lastname: Yang
authors.forename: Jian
authors.initials: J
authors.lastname: Xia
mesh_terms: D015374:Biosensing Techniques; D003035:Cobalt / Q000737:chemistry*; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis*; D053761:Nanocomposites / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D011166:Porphyrins / Q000737:chemistry*
chemical_list: D010087:Oxides; D011166:Porphyrins; C409084:tetraphenylporphyrin; D003035:Cobalt; D006108:Graphite; D006861:Hydrogen Peroxide