TY - JOUR
T1 - Synthesis of oxygen functional group-controlled monolayer graphene oxide
AU - Tsugawa, Tatsuki
AU - Hatakeyama, Kazuto
AU - Matsuda, Junko
AU - Koinuma, Michio
AU - Ida, Shintaro
N1 - Funding Information:
We express our gratitude Mr. Tetsuya Sato (Kumamoto Univer-sity) and Mr. Akihiro Yamashita for the XRD measurement and elemental analysis, respectively. This work was supported by JSPS KAKENHI Grant Numbers JP19K05673 and 18H01835.
Publisher Copyright:
© 2021 The Chemical Society of Japan
PY - 2021
Y1 - 2021
N2 - Graphene oxide (GO) contains various types of oxygen functional groups (e.g., COH, COC, C=O, and O=COH groups), which provide superior functions such as proton conductivity, catalytic activity, and selective absorption. In contrast, the complex structure of GO complicates control over its function; therefore, GO with a simple and/or uniform structure is desired. In this study, we demonstrated that monolayer GO, in which surface oxygen functional groups are controlled asepoxy groups, was successfully prepared by exfoliating graphite oxide prepared using Brodie’s method. The monolayer ratio of GO reached 99.2%, and the nanosheets were stable in water for 1 month. Fourier transform infrared, X-ray photoelectron spectroscopy, and temperature-programmed desorption analyses indicated that most oxygen functional groups on GO were epoxy groups. Further, it was determined that GO had structural regularity over a wide range and small amounts of lattice defects despite being oxidized. This means that the developed GO can potentially advance considerably GO studies by replacing previous GO.
AB - Graphene oxide (GO) contains various types of oxygen functional groups (e.g., COH, COC, C=O, and O=COH groups), which provide superior functions such as proton conductivity, catalytic activity, and selective absorption. In contrast, the complex structure of GO complicates control over its function; therefore, GO with a simple and/or uniform structure is desired. In this study, we demonstrated that monolayer GO, in which surface oxygen functional groups are controlled asepoxy groups, was successfully prepared by exfoliating graphite oxide prepared using Brodie’s method. The monolayer ratio of GO reached 99.2%, and the nanosheets were stable in water for 1 month. Fourier transform infrared, X-ray photoelectron spectroscopy, and temperature-programmed desorption analyses indicated that most oxygen functional groups on GO were epoxy groups. Further, it was determined that GO had structural regularity over a wide range and small amounts of lattice defects despite being oxidized. This means that the developed GO can potentially advance considerably GO studies by replacing previous GO.
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U2 - 10.1246/bcsj.20210169
DO - 10.1246/bcsj.20210169
M3 - Article
AN - SCOPUS:85116859937
VL - 94
SP - 2195
EP - 2201
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 9
ER -