2024-03-28T10:43:46Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00017849
2022-12-14T04:12:26Z
1626:1627
Comparative pore structure analysis of highly porous graphene monoliths treated at different temperatures with adsorption of N-2 at 77.4 K and of Ar at 87.3 K and 77.4 K
Wang, Shuwen
Minami, Daiki
Kaneko, Katsumi
© 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Nitrogen adsorption
Argon adsorption
Nanoporous carbon
Subtracting pore effect method
Pore size distribution
We prepared nanoporous graphene monolith of different porosity by high temperature treatment up to 2073 K in Ar. The porosity is comparatively evaluated with N-2 adsorption isotherms at 77.4 K and Ar adsorption isotherms at 87.3 K and 77.4 K. N-2 adsorption at 77.4 K shows an excess adsorption amount below 3 x 10(-3) of the relative pressure which is caused by the quadrupole moment of an N-2 molecule. This effect doesn't give significant influence on the determination of the total surface area from subtracting pore effect (SPE) method, the micropore volume from Dubinin-Radushkevich (DR) method and the total pore volumes from the Gurvitch rule. However, the peak of the micropore size distribution determined by Horvath-Kawazoe (HK) method from N-2 adsorption at 77.4 K shifts to a smaller size than that from Ar adsorption at 87.3 K by 0.05-0.09 nm. (C) 2015 Elsevier Inc. All rights reserved.
Article
MICROPOROUS AND MESOPOROUS MATERIALS. 209:72-78 (2015)
ELSEVIER SCIENCE BV
2015-06
eng
journal article
AM
http://hdl.handle.net/10091/00018618
https://soar-ir.repo.nii.ac.jp/records/17849
https://doi.org/10.1016/j.micromeso.2015.01.014
10.1016/j.micromeso.2015.01.014
1387-1811
AA11160707
MICROPOROUS AND MESOPOROUS MATERIALS
209
72
78
https://soar-ir.repo.nii.ac.jp/record/17849/files/Comparative_pore_structure_analysis_highly.pdf
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