Potential applications of previously synthesized pillared graphene oxide frameworks with phenyldiboronic acid linkers in the field of the adsorption and separation of polar protic and aprotic liquid solvents have been systematically explored using grand canonical Monte Carlo simulations. Particular attention was initially paid to the adsorption of pure liquid water, methanol, and dimethyl sulfoxide. The results obtained a significant increase in the isosteric heat of adsorption at low uptake in the case of dimethyl sulfoxide, which is about 17.9 and 26.8 kJ/mol higher than the values corresponding to methanol and water adsorption. These findings indicated that from a thermodynamic point of view, these pillared graphene oxide frameworks could be used in the separation of dimethyl sulfoxide–water liquid mixtures. Systematic grand canonical Monte Carlo simulations were then subsequently performed for dimethyl sulfoxide–water mixtures, with a low dimethyl sulfoxide concentration. The calculated values of the separation selectivity indicate that these materials could have potential applications in the separation of these mixed liquid solvents. Molecular dynamics simulations performed for a representative adsorbed mixture have revealed a substantial slowing down of the dynamics under confinement, particularly in the case of the hydrogen bonds formed between water and dimethyl sulfoxide.
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14 May 2024
Research Article|
May 08 2024
Pillared graphene oxide frameworks for the adsorption and separation of polar protic and aprotic liquid solvents: The cases of pure water, methanol, dimethyl sulfoxide, and dimethyl sulfoxide–water mixtures
Special Collection:
Porous Solids for Energy Applications
Ioannis Skarmoutsos
;
Ioannis Skarmoutsos
a)
(Conceptualization, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Laboratory of Physical Chemistry, Department of Chemistry, University of Ioannina
, 45110 Ioannina, Greece
a)Author to whom correspondence should be addressed: iskarmoutsos@uoi.gr
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Emmanuel N. Koukaras
;
Emmanuel N. Koukaras
(Conceptualization, Investigation, Methodology, Writing – review & editing)
2
Laboratory of Quantum and Computational Chemistry, Department of Chemistry, Aristotle University of Thessaloniki
, 54124 Thessaloniki, Greece
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Emmanuel Klontzas
Emmanuel Klontzas
(Conceptualization, Investigation, Methodology, Writing – review & editing)
3
Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation
, Vas. Constantinou 48, GR-116 35 Athens, Greece
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a)Author to whom correspondence should be addressed: iskarmoutsos@uoi.gr
J. Chem. Phys. 160, 184701 (2024)
Article history
Received:
February 10 2024
Accepted:
April 20 2024
Citation
Ioannis Skarmoutsos, Emmanuel N. Koukaras, Emmanuel Klontzas; Pillared graphene oxide frameworks for the adsorption and separation of polar protic and aprotic liquid solvents: The cases of pure water, methanol, dimethyl sulfoxide, and dimethyl sulfoxide–water mixtures. J. Chem. Phys. 14 May 2024; 160 (18): 184701. https://doi.org/10.1063/5.0203165
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