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, doi: 10.1021/jp311727t.

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Title Tuning radical species in graphene oxide in aqueous solution by photoirradiation
Author(s) Hou, Xue-Liang
Li, Jing-LiangORCID iD for Li, Jing-Liang orcid.org/0000-0003-0709-2246
Drew, Simon C.
Tang, BinORCID iD for Tang, Bin orcid.org/0000-0001-7111-8223
Sun, LuORCID iD for Sun, Lu orcid.org/0000-0003-2999-1250
Wang, Xun-GaiORCID iD for Wang, Xun-Gai orcid.org/0000-0002-3549-6769
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
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
DOI 10.1021/jp311727t
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
Collections: Institute for Frontier Materials
GTP Research
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