Journal
NEW JOURNAL OF CHEMISTRY
Volume 39, Issue 4, Pages 2425-2428Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nj02299h
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2006-0050684]
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A novel and facile method to synthesize graphene quantum dots (GQDs) from graphene oxide (GO) via sonication or UV-irradiation reaction using an acid-free oxone oxidant (potassium monopersulfate) that does not require a neutralization process with a strong base was developed. Our novel sono- and photo-oxidation approach yielded high quality GQDs after simple purification. GO sheets treated by sono- and photo-oxidation with the oxone oxidant as the free radical source broke in multiple places for efficient generation of GQDs. Sono-oxidation is a simpler and more facile method than photo-oxidation in terms of mass production and the strong fluorescence properties of the resulting GQDs. Facile synthesis by sono- and photo-oxidation represents a new route to prepare GQDs from GO in organic solvent.
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