Abstract
X-ray scattering (XRS) experiments have been performed on multi-layered graphene oxide (GO) paper. GO can be easily hydrated as water naturally intercalates in the hydrophilic nanostructure. The effect of the intercalated water on the XRS signals is measured during dehydration under thermal treatment in the temperature range 298–473 K as well as during hydration under saturated water vapour pressure. A simple modelling of the XRS signals by taking into account the presence and the type of intercalated water (bound water or physisorbed water) is introduced. It allows an explanation of the variations of intensity and position of XRS reflections observed experimentally.
Highlights
Water confined in nanometric carbon structures can exhibit structural and dynamical properties different from its bulk properties
We aim to investigate the effect of intercalated water in graphene oxide (GO) on X-ray scattering (XRS) data
XRS measurements were performed under vacuum on a multilayered graphene oxide (GO) paper undergoing thermal treatment in the temperature range [298–473 K] as well as a hydration process in a saturated water vapour atmosphere
Summary
Water confined in nanometric carbon structures can exhibit structural and dynamical properties different from its bulk properties. Nanoconfined water can form various kinds of ice in onedimensional carbon nanotubes (Kolesnikov et al, 2004; Kyakuno et al, 2011; Mochizuki & Koga, 2015) or within twodimensional graphene assemblies (Algara-Siller et al, 2015; Li et al, 2015). GO can trap water with interesting hydration and solvation properties (Talyzin et al, 2014). It can be considered as a two-dimensional model system for the study of water confined between hydrophilic nanosheets
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