Tuning radical species in graphene oxide in aqueous solution by photoirradiation

Hou, Xue-Liang, Li, Jing-Liang, Drew, Simon C., Tang, Bin, Sun, Lu and Wang, Xun-Gai 2013, Tuning radical species in graphene oxide in aqueous solution by photoirradiation, Journal of physical chemistry C, vol. 117, no. 13, pp. 6788-6793.

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Title Tuning radical species in graphene oxide in aqueous solution by photoirradiation
Author(s) Hou, Xue-Liang
Li, Jing-Liang
Drew, Simon C.
Tang, Bin
Sun, Lu
Wang, Xun-Gai
Journal name Journal of physical chemistry C
Volume number 117
Issue number 13
Start page 6788
End page 6793
Total pages 6
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2013
ISSN 1932-7447
1932-7455
Summary Graphene oxide (GO) possesses unusual electronic and mechanical properties, including the ability to stabilize graphene radicals (GRs). However, controlled generation of GRs remains a challenge for applications requiring large-scale production. In this study, we demonstrate controlled production of GRs by UVB irradiation of GO solutions. Electron paramagnetic resonance spectroscopy of GO solutions revealed a dose-dependent exponential growth in radical production as a function of UVB exposure time. The GRs were air-stable over a long period, both in the solution state and in freeze-dried powders, suggesting they are graphene-based phenalenyl-like radicals. The redox activity of GRs was demonstrated by their ability to oxidize the chromophore 3,5,3?,5?- tetramethylbenzidine, with oxidation capacity of GO increasing with GR content.
Language eng
Field of Research 100708 Nanomaterials
020406 Surfaces and Structural Properties of Condensed Matter
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055266

Document type: Journal Article
Collection: Institute for Frontier Materials
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