$sp^{2}$/$sp^{3}$ carbon ratio in graphite oxide with different preparation times

Details $sp^{2}$/$sp^{3}$ carbon ratio in graphite oxide with different preparation times $sp^{2}$/$sp^{3}$ carbon ratio in graphite oxide with different preparation times

2010-07-02

arxiv.org/abs/1007.0287v2

J. Phys. Chem. C, 115, 2705 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1021/jp107906u

Graphite oxide is an amorphous insulator. Although several models have been suggested, its structure remains controversial. To elucidate this issue, 5 samples were prepared by the Brodie process and the Staudenmaier process. The electronic structure of graphite oxide was examined with x-ray absorption near edge structure and the ratio of $sp^{2}$ to $sp^{3}$ bonded carbon atoms was investigated with x-ray photoemission spectroscopy as a function of sample preparation times. It was found that this ratio approaches 0.3 exponentially with a characteristic time of 1.5 weeks. We believe this long characteristic time is the reason the structure has remained unclear.

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