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Christopher W Bielawski
다차원 탄소재료 연구단
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Real-Time, in Situ Monitoring of the Oxidation of Graphite: Lessons Learned

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Title
Real-Time, in Situ Monitoring of the Oxidation of Graphite: Lessons Learned
Author(s)
Naoki Morimoto; Hideyuki Suzuki; Yasuo Takeuchi; Shogo Kawaguchi; Masahiro Kunisu; Christopher W. Bielawski; Yuya Nishina
Publication Date
2017-03
Journal
CHEMISTRY OF MATERIALS, v.29, no.5, pp.2150 - 2156
Publisher
AMER CHEMICAL SOC
Abstract
Graphite oxide (GO) and its constituent layers (i.e., graphene oxide) display a broad range of functional groups and, as such, have attracted significant attention for use in numerous applications. GO is commonly prepared using the "Hummers method" or a variant thereof in which graphite is treated with KMnO4 and various additives in H2SO4. Despite its omnipresence, the underlying chemistry of such oxidation reactions is not well understood and typically affords results that are irreproducible and, in some cases, unsafe. To overcome these limitations, the oxidation of graphite under Hummers-type conditions was monitored over time using in situ X-ray diffraction and in situ X-ray absorption near edge structure analyses with synchrotron radiation. In conjunction with other atomic absorption spectroscopy, UV vis spectroscopy and elemental analysis measurements, the underlying mechanism of the oxidation reaction was elucidated, and the reaction conditions were optimized. Ultimately, the methodology for reproducibly preparing GO on large scales using only graphite, H2SO4 and KMnO4 was developed and successfully adapted for use in continuous flow systems © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3546
ISSN
0897-4756
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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