Nitrogen-doped graphene-silver nanodendrites for the non-enzymatic detection of hydrogen peroxide

Tajabadi, M.T. and Basirun, Wan Jefrey and Lorestani, F. and Zakaria, Rozalina and Baradaran, S. and Amin, Yusoff Mohd and Mahmoudian, M.R. and Rezayi, M. and Sookhakian, M. (2015) Nitrogen-doped graphene-silver nanodendrites for the non-enzymatic detection of hydrogen peroxide. Electrochimica Acta, 151. pp. 126-133. ISSN 0013-4686, DOI

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An organic-metal hybrid film based on nitrogen-doped graphene-silver nanodendrites (Ag-NG) was fabricated on an indium tin oxide (ITO) electrode using a simple electrophoretic and electrochemical sequential deposition approach. The microwave-assisted method was utilized for the synthesis of nitrogen-doped graphene. This method involves a three-step process consisting of graphite oxidation, exfoliation, and finally chemical reduction with the use of hydrazine as the reducing agent, which leads to the simultaneous reduction of graphene oxide and production of nitrogen-doped graphene. The morphology and structure of the as-fabricated electrode were determined by X-ray diffraction, field emission electron microscopy and transmission electron microscopy. The as-prepared Ag-NG-modified ITO electrode exhibited superior electrocatalytic activity toward hydrogen peroxide (H2O2) reduction, with a wide linear detection range of 100 μM to 80 mM (r = 0.9989) and a detection limit of 0.26 μM with a signal-to-noise ratio of 3. Furthermore, the fabricated non-enzymatic H2O2 electrochemical sensor exhibited excellent stability and reproducibility.

Item Type: Article
Uncontrolled Keywords: Silver nanodendrite; N-graphene; electrodeposition; Hydrogen peroxide; electrophoretic deposition
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Jan 2015 13:10
Last Modified: 31 Jan 2019 07:31

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