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Distorted Graphene Sheet Structure-Derived Latent Nanoporosity

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journal contribution
posted on 23.05.2016 by Shuwen Wang, Dániel Ábrahám, Fernando Vallejos-Burgos, Krisztina László, Erik Geissler, Kenji Takeuchi, Morinobu Endo, Katsumi Kaneko
High surface area graphene monoliths consist mainly of single graphene layers wider than 10 nm. The interlayer porosity of high temperature treated nanoporous graphene monoliths with tuned intergraphene layer structures is evaluated by hybrid analysis of Ar adsorption at 87 K, N2 adsorption at 77 K, high resolution transmission electron microscopic observation, and small-angle X-ray scattering (SAXS) measurements. SAXS analysis results in surface areas that are 1.4 and 4.5 times larger than those evaluated by Ar adsorption for graphene monoliths nontreated and treated at 2273 K, respectively. A distorted graphene sheet structure model is proposed for the high surface area graphene monoliths on the basis of the hybrid analysis.