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Yavuzturk Gul B, Pekgenc E, Vatanpour V, Koyuncu I. A review of cellulose-based derivatives polymers in fabrication of gas separation membranes: Recent developments and challenges. Carbohydr Polym 2023; 321:121296. [PMID: 37739529 DOI: 10.1016/j.carbpol.2023.121296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 09/24/2023]
Abstract
Due to low-cost, sustainability and good mechanical stability, cellulose-based materials are frequently used in fabrication of polymeric gas separation membrane as potential carbohydrate polymers to substitute traditional petrochemical-based materials. In this review, the performance of cellulose-based polymeric membranes i.e. cellulose acetate, cellulose diacetate, cellulose triacetate, ethyl cellulose and carboxymethyl cellulose in the separation of different gases were investigated. This review paper provides the main features and advantages in the fabrication of cellulose-based gas separation membranes. The influence of the functionalization of cellulose on gas separation and permeability performance of related membranes is considered. Influence of different modification procedures such as blending with polymers, nanomaterials and ionic liquids on the gas separation ability of cellulose-based membranes were reviewed. Moreover, a brief inquiry of the potential of cellulose-based gas separation membranes for industrial applications, by examining the performance of different cellulose derivatives and identifying potential strategies for membrane modification and optimization are given, along with the current restrictions and the future perspectives are discussed.
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Affiliation(s)
- Bahar Yavuzturk Gul
- National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey; Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Enise Pekgenc
- National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey; Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Vahid Vatanpour
- National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey; Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey; Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911 Tehran, Iran.
| | - Ismail Koyuncu
- National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey; Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
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Moreno H, Domingues GL, Assis M, Ortega PP, Mastelaro VR, Ramirez MA, Simões AZ. The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO 2 Nanocrystals. Inorg Chem 2023; 62:4291-4303. [PMID: 36862825 DOI: 10.1021/acs.inorgchem.2c04411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
In this work, we focus on understanding the morphology and photocatalytic properties of CeO2 nanocrystals (NCs) synthesized via a microwave-assisted solvothermal method using acetone and ethanol as solvents. Wulff constructions reveal a complete map of available morphologies and a theoretical-experimental match with octahedral nanoparticles obtained through synthesis using ethanol as solvent. NCs synthesized in acetone show a greater contribution of emission peaks in the blue region (∼450 nm), which may be associated with higher Ce3+ concentration, originating shallow-level defects within the CeO2 lattice while for the samples synthesized in ethanol a strong orange-red emission (∼595 nm) suggests that oxygen vacancies may originate from deep-level defects within the optical bandgap region. The superior photocatalytic response of CeO2 synthesized in acetone compared to that of CeO2 synthesized in ethanol may be associated with an increase in long-/short-range disorder within the CeO2 structure, causing the Egap value to decrease, facilitating light absorption. Furthermore, surface (100) stabilization in samples synthesized in ethanol may be related to low photocatalytic activity. Photocatalytic degradation was facilitated by the generation of ·OH and ·O2- radicals as corroborated by the trapping experiment. The mechanism of enhanced photocatalytic activity has been proposed suggesting that samples synthesized in acetone tend to have lower e'─h· pair recombination, which is reflected in their higher photocatalytic response.
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Affiliation(s)
- H Moreno
- School of Engineering and Science, São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, Guaratingueta 12516-410, São Paulo, Brazil
| | - G L Domingues
- School of Engineering and Science, São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, Guaratingueta 12516-410, São Paulo, Brazil
| | - M Assis
- Department of Analytical and Physical Chemistry, University Jaume I, Av. Vicent Sos Baynat s/n, Castellón 12071, Spain
| | - P P Ortega
- School of Engineering and Science, São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, Guaratingueta 12516-410, São Paulo, Brazil
| | - V R Mastelaro
- São Carlos Institute of Physics, University of São Paulo, São Carlos 13566-590, Brazil
| | - M A Ramirez
- School of Engineering and Science, São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, Guaratingueta 12516-410, São Paulo, Brazil
| | - A Z Simões
- School of Engineering and Science, São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, Guaratingueta 12516-410, São Paulo, Brazil
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Regmi C, Azadmanjiri J, Mishra V, Sofer Z, Ashtiani S, Friess K. Cellulose Triacetate-Based Mixed-Matrix Membranes with MXene 2D Filler-CO 2/CH 4 Separation Performance and Comparison with TiO 2-Based 1D and 0D Fillers. MEMBRANES 2022; 12:917. [PMID: 36295678 PMCID: PMC9610833 DOI: 10.3390/membranes12100917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/16/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Mixed-matrix membranes (MMMs) possess the unique properties and inherent characteristics of their component polymer and inorganic fillers, or other possible types of additives. However, the successful fabrication of compact and defect-free MMMs with a homogeneous filler distribution poses a major challenge, due to poor filler/polymer compatibility. In this study, we use two-dimensional multi-layered Ti3C2Tx MXene nanofillers to improve the compatibility and CO2/CH4 separation performance of cellulose triacetate (CTA)-based MMMs. CTA-based MMMs with TiO2-based 1D (nanotubes) and 0D (nanofillers) additives were also fabricated and tested for comparison. The high thermal stability, compact homogeneous structure, and stable long-term CO2/CH4 separation performance of the CTA-2D samples suggest the potential application of the membrane in bio/natural gas separation. The best results were obtained for the CTA-2D sample with a loading of 3 wt.%, which exhibited a 5-fold increase in CO2 permeability and 2-fold increase in CO2/CH4 selectivity, compared with the pristine CTA membrane, approaching the state-of-the-art Robeson 2008 upper bound. The dimensional (shape) effect on separation performance was determined as 2D > 1D > 0D. The use of lamellar stacked MXene with abundant surface-terminating groups not only prevents the aggregation of particles but also enhances the CO2 adsorption properties and provides additional transport channels, resulting in improved CO2 permeability and CO2/CH4 selectivity.
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Affiliation(s)
- Chhabilal Regmi
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
- Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Jalal Azadmanjiri
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Vipin Mishra
- Department of Glass and Ceramics, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Saeed Ashtiani
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Karel Friess
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague 6, Czech Republic
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Regmi C, Ashtiani S, Průša F, Friess K. Synergistic effect of hybridized TNT@GO fillers in CTA-based mixed matrix membranes for selective CO2/CH4 separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120128] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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CO 2/CH 4 and H 2/CH 4 Gas Separation Performance of CTA-TNT@CNT Hybrid Mixed Matrix Membranes. MEMBRANES 2021; 11:membranes11110862. [PMID: 34832091 PMCID: PMC8625587 DOI: 10.3390/membranes11110862] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/06/2021] [Accepted: 11/07/2021] [Indexed: 11/16/2022]
Abstract
This study explored the underlying synergy between titanium dioxide nanotube (TNT) and carbon nanotube (CNT) hybrid fillers in cellulose triacetate (CTA)-based mixed matrix membranes (MMMs) for natural gas purification. The CNT@TNT hybrid nanofillers were blended with CTA polymer and cast as a thin film by a facile casting technique, after which they were used for single gas separation. The hybrid filler-based membrane depicted a higher CO2 uptake affinity than the single filler (CNT/TNT)-based membrane. The gas separation results indicate that the hybrid fillers (TNT@CNT) are strongly selective for CO2 over CH4 and H2 over CH4. The increment in the CO2/CH4 and H2/CH4 selectivities compared to the pristine CTA membrane was 42.98 from 25.08 and 48.43 from 36.58, respectively. Similarly, the CO2 and H2 permeability of the CTA-TNT@CNT membrane increased by six- and five-fold, respectively, compared to the pristine CTA membrane. Such significant improvements in CO2/CH4 and H2/CH4 separation performance and thermal and mechanical properties suggest a feasible and practical approach for potential biogas upgrading and natural gas purification.
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Regmi C, Ashtiani S, Sofer Z, Friess K. Improved CO 2/CH 4 Separation Properties of Cellulose Triacetate Mixed-Matrix Membranes with CeO 2@GO Hybrid Fillers. MEMBRANES 2021; 11:membranes11100777. [PMID: 34677542 PMCID: PMC8539915 DOI: 10.3390/membranes11100777] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/05/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022]
Abstract
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.
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Affiliation(s)
- Chhabilal Regmi
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic;
- Correspondence: (C.R.); (K.F.)
| | - Saeed Ashtiani
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic;
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic;
| | - Karel Friess
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628 Prague, Czech Republic;
- Correspondence: (C.R.); (K.F.)
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