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ID 55211
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Morimoto, Naoki Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Division of Pharmaceutical Sciences, Okayama University
Suzuki, Hideyuki Research Core for Interdisciplinary Sciences, Okayama University
Takeuchi, Yasuo Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Division of Pharmaceutical Sciences, Okayama Universit
Kawaguchi, Shogo Japan Synchrotron Radiation Research Institute (JASRI), SPring-8
Kunisu, Masahiro Toray Research Center, Inc., Surface Science Laboratories
Bielawski, Christopher W. Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS)
Nishina, Yuta Research Core for Interdisciplinary Sciences, Okayama University
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.
Published Date
2017-03-02
Publication Title
Chemistry of Materials
Volume
volume29
Issue
issue5
Publisher
American Chemical Society
Start Page
2150
End Page
2156
ISSN
15205002
NCID
AA12096771
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
Copyright Holders
Copyright © 2017 American Chemical Society
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isVersionOf https://doi.org/10.1021/acs.chemmater.6b04807