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Control of size and physical properties of graphene oxide by changing the oxidation temperature

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2012, 13(1), pp.39-43
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Dongwoo Kang 1 Shin Hyeon Suk 2

1Ulsan National Institute of Science and Technology
2울산과학기술대학교

Accredited

ABSTRACT

The size and the physical properties of graphene oxide sheets were controlled by changing the oxidation temperature of graphite. Graphite oxide (GO) samples were prepared at different oxidation temperatures of 20℃, 27℃ and 35℃ using a modified Hummers’ method. The carbonto-oxygen (C/O) ratio and the average size of the GO sheets varied according to the oxidation temperature: 1.26 and 12.4 μm at 20oC, 1.24 and 10.5 μm at 27oC, and 1.18 and 8.5 μm at 35℃. This indicates that the C/O ratio and the average size of the graphene oxide sheets respectively increase as the oxidation temperature decreases. Moreover, it was observed that the surface charge and optical properties of the graphene oxide sheets could be tuned by changing the temperature. This study demonstrates the tunability of the physical properties of graphene oxide sheets and shows that the properties depend on the functional groups generated during the oxidation process.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2023-01-02)

Total Citation Counts(KCI+WOS) (46) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

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