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Article

Improved CO2/CH4 Separation Properties of Cellulose Triacetate Mixed–Matrix Membranes with CeO2@GO Hybrid Fillers

1
Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic
2
Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic
*
Authors to whom correspondence should be addressed.
Academic Editors: Tymen Visser, Oguz Karvan and Alberto Tena
Membranes 2021, 11(10), 777; https://doi.org/10.3390/membranes11100777
Received: 16 September 2021 / Revised: 5 October 2021 / Accepted: 8 October 2021 / Published: 11 October 2021
The study of the effects associated with the compatibility of the components of the hybrid filler with polymer matrix, which ultimately decide on achieving mixed matrix membranes (MMMs) with better gas separation properties, is essential. Herein, a facile solution casting process of simple incorporating CeO2@GO hybrid inorganic filler material is implemented. Significant improvements in material and physico-chemical properties of the synthesized membranes were observed by SEM, XRD, TGA, and stress-strain measurements. Usage of graphene oxide (GO) with polar groups on the surface enabled forming bonds with ceria (CeO2) nanoparticles and CTA polymer and provided the homogeneous dispersion of the nanofillers in the hybrid MMMs. Moreover, increasing GO loading concentration enhanced both gas permeation in MMMs and CO2 gas uptakes. The best performance was achieved by the membrane containing 7 wt.% of GO with CO2 permeability of 10.14 Barrer and CO2/CH4 selectivity 50.7. This increase in selectivity is almost fifteen folds higher than the CTA-CeO2 membrane sample, suggesting the detrimental effect of GO for enhancing the selectivity property of the MMMs. Hence, a favorable synergistic effect of CeO2@GO hybrid fillers on gas separation performance is observed, propounding the efficient and feasible strategy of using hybrid fillers in the membrane for the potential biogas upgrading process. View Full-Text
Keywords: gas separation; cellulose triacetate; CeO2@GO hybrid fillers; mixed-matrix membrane gas separation; cellulose triacetate; CeO2@GO hybrid fillers; mixed-matrix membrane
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MDPI and ACS Style

Regmi, C.; Ashtiani, S.; Sofer, Z.; Friess, K. Improved CO2/CH4 Separation Properties of Cellulose Triacetate Mixed–Matrix Membranes with CeO2@GO Hybrid Fillers. Membranes 2021, 11, 777. https://doi.org/10.3390/membranes11100777

AMA Style

Regmi C, Ashtiani S, Sofer Z, Friess K. Improved CO2/CH4 Separation Properties of Cellulose Triacetate Mixed–Matrix Membranes with CeO2@GO Hybrid Fillers. Membranes. 2021; 11(10):777. https://doi.org/10.3390/membranes11100777

Chicago/Turabian Style

Regmi, Chhabilal, Saeed Ashtiani, Zdeněk Sofer, and Karel Friess. 2021. "Improved CO2/CH4 Separation Properties of Cellulose Triacetate Mixed–Matrix Membranes with CeO2@GO Hybrid Fillers" Membranes 11, no. 10: 777. https://doi.org/10.3390/membranes11100777

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