期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 69, 期 -, 页码 398-406出版社
ELSEVIER
DOI: 10.1016/j.msec.2016.06.069
关键词
Electrochemically reduced graphene oxide; Hydrogen peroxide; Non-enzymatic; Electrocatalytic reduction; Electrochemical biosensors
资金
- Council of Scientific Industrial Research (CSIR), New Delhi [124094/2K12/1]
Herein, We report a simple, facile and reproducible non-enzymatic hydrogen peroxide (H2O2) sensor using electrochemically reduced graphene oxide (ERGO) modified glassy carbon electrode (GCE). The modified electrode was characterized by Fourier transform infrared (FT-IR), UV-Visible, scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. Cyclic voltammetric (CV) analysis revealed that ERGO/GCE exhibited virtuous charge transfer properties for a standard redox systems and showed excellent performance towards electroreduction of H2O2. Amperometric study using ERGO/GCE showed high sensitivity (0.3 mu A/mu M) and faster response upon the addition of H2O2 at an applied potential of -0.25 V vs. Ag/AgCl. The detection limit is assessed to be 0.7 mu M (S/N = 3) and the time to reach a stable study state current is <3 s for a linear range of H2O2 concentration (1-16 mu M). In addition, the modified electrode exhibited good reproducibility and long-term stability. (C) 2016 Elsevier B.V. All rights reserved.
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