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                    pp. 1167-1179 S&M1843 Research Paper of Special Issue (Invited) https://doi.org/10.18494/SAM.2019.2124 Published: April 11, 2019 Facile Preparation of Hemin-functionalized Electrochemically Reduced Graphene Oxide Nanocomposite for H2O2 Biosensing [PDF] Zhi Chen, Dong Liu, Chengxi Zhu, Libo Li, and Tianyan You (Received August 30, 2018; Accepted December 27, 2018) Keywords: Hemin, electrochemically reduced graphene oxide, nonenzymatic biosensor, hydrogen peroxide 
                        A Hemin-functionalized electrochemically reduced graphene oxide (H-ERGO) nanocomposite was prepared for the construction of a nonenzymatic H2O2 biosensor.  H-ERGO was directly modified on the electrode surface without using a binder by electrochemical reduction.  Detailed physical and electrical characterizations of H-ERGO were conducted by scanning electron microscopy, UV-vis absorption spectroscopy, and electrochemical impedance spectroscopy (EIS).  Taking advantage of the superior catalytic properties of H-ERGO, we applied the proposed biosensor to H2O2 analysis.  Under optimized conditions, the H-ERGO-based biosensor exhibited a wide linear range from 25 to 8850 and 8850 to 28850 μM, with a detection limit (S/N = 3) of 8.33 μM for H2O2 determination.  Furthermore, it was also successfully applied to detect H2O2 in milk samples with recoveries ranging from 94.6 to 98.1%.Corresponding author: Dong Liu, Tianyan You   This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Zhi Chen, Dong Liu, Chengxi Zhu, Libo Li, and Tianyan You, Facile Preparation of Hemin-functionalized Electrochemically Reduced Graphene Oxide Nanocomposite for H2O2 Biosensing, Sens. Mater., Vol. 31, No. 4, 2019, p. 1167-1179. |