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Issue 1, 2014
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The structure of graphene oxide membranes in liquid water, ethanol and water–ethanol mixtures

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Abstract

The structure of graphene oxide (GO) membranes was studied in situ in liquid solvents using synchrotron radiation X-ray diffraction in a broad temperature interval. GO membranes are hydrated by water similarly to precursor graphite oxide powders but intercalation of alcohols is strongly hindered, which explains why the GO membranes are permeated by water and not by ethanol. Insertion of ethanol into the membrane structure is limited to only one monolayer in the whole studied temperature range, in contrast to precursor graphite oxide powders, which are intercalated with up to two ethanol monolayers (Brodie) and four ethanol monolayers (Hummers). As a result, GO membranes demonstrate the absence of “negative thermal expansion” and phase transitions connected to insertion/de-insertion of alcohols upon temperature variations reported earlier for graphite oxide powders. Therefore, GO membranes are a distinct type of material with unique solvation properties compared to parent graphite oxides even if they are composed of the same graphene oxide flakes.

Graphical abstract: The structure of graphene oxide membranes in liquid water, ethanol and water–ethanol mixtures

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Article information


Submitted
30 Aug 2013
Accepted
10 Oct 2013
First published
14 Oct 2013

Nanoscale, 2014,6, 272-281
Article type
Paper

The structure of graphene oxide membranes in liquid water, ethanol and water–ethanol mixtures

A. V. Talyzin, T. Hausmaninger, S. You and T. Szabó, Nanoscale, 2014, 6, 272
DOI: 10.1039/C3NR04631A

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