Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations
To address the environmental issues arising from the emission of radiotoxic iodine from nuclear waste streams, developing high-capacity and recyclable adsorbents is urgently demanded. In this study, a nitrogen-rich covalent-triazine framework (CTF-bpy) was synthesized through the ionothermal synthet...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Chemical Engineering Journal Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821121000661 |
| _version_ | 1818424945202429952 |
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| author | Sina Pourebrahimi Majid Pirooz |
| author_facet | Sina Pourebrahimi Majid Pirooz |
| author_sort | Sina Pourebrahimi |
| collection | DOAJ |
| description | To address the environmental issues arising from the emission of radiotoxic iodine from nuclear waste streams, developing high-capacity and recyclable adsorbents is urgently demanded. In this study, a nitrogen-rich covalent-triazine framework (CTF-bpy) was synthesized through the ionothermal synthetic method and was used as a reusable adsorbent to capture iodine vapor for sequential cycles. The obtained CTF-bpy adsorbent showed ultrahigh iodine vapor capture capacity of 4.52 g.g−1 at 90 °C and atmospheric pressure, which ranks among the highest values reported to date. CTF-bpy could be simply recycled by washing and heating while preserving above 89.6% of its initial iodine capture capacity after five consecutive cycles, demonstrating its excellent structural stability. Assessment of the adsorption kinetics of the iodine vapor through the fractal-like pseudo-first-order (FL-PFO) kinetic model revealed that the diffusion through micropores was the rate-controlling mechanism. Moreover, the density functional theory (DFT) calculations further demonstrated the significance of the surface's basicity and aromaticity of the structure in efficiently capturing the iodine species. This study may shed light on designing and developing novel adsorbents suitable for solving one of the main environmental issues. |
| first_indexed | 2024-12-14T14:06:06Z |
| format | Article |
| id | doaj.art-054226cfef8646e2b9955a3211f88c82 |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-12-14T14:06:06Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-054226cfef8646e2b9955a3211f88c822022-12-21T22:58:30ZengElsevierChemical Engineering Journal Advances2666-82112021-11-018100150Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigationsSina Pourebrahimi0Majid Pirooz1Department of Chemical and Materials Engineering, Concordia University, 7141 Sherbrooke Street West, Montréal, Quebec, H4B 1R6, CanadaResearch and Development Division, Pad Jam Polymer Development Company (PJPC) and Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, P.O. Box 81746-73441 Isfahan, Islamic Republic of Iran; Corresponding author.To address the environmental issues arising from the emission of radiotoxic iodine from nuclear waste streams, developing high-capacity and recyclable adsorbents is urgently demanded. In this study, a nitrogen-rich covalent-triazine framework (CTF-bpy) was synthesized through the ionothermal synthetic method and was used as a reusable adsorbent to capture iodine vapor for sequential cycles. The obtained CTF-bpy adsorbent showed ultrahigh iodine vapor capture capacity of 4.52 g.g−1 at 90 °C and atmospheric pressure, which ranks among the highest values reported to date. CTF-bpy could be simply recycled by washing and heating while preserving above 89.6% of its initial iodine capture capacity after five consecutive cycles, demonstrating its excellent structural stability. Assessment of the adsorption kinetics of the iodine vapor through the fractal-like pseudo-first-order (FL-PFO) kinetic model revealed that the diffusion through micropores was the rate-controlling mechanism. Moreover, the density functional theory (DFT) calculations further demonstrated the significance of the surface's basicity and aromaticity of the structure in efficiently capturing the iodine species. This study may shed light on designing and developing novel adsorbents suitable for solving one of the main environmental issues.http://www.sciencedirect.com/science/article/pii/S2666821121000661Iodine captureNuclear waste pollutionAdsorbentDFT calculationsConjugated polymers |
| spellingShingle | Sina Pourebrahimi Majid Pirooz Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations Chemical Engineering Journal Advances Iodine capture Nuclear waste pollution Adsorbent DFT calculations Conjugated polymers |
| title | Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations |
| title_full | Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations |
| title_fullStr | Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations |
| title_full_unstemmed | Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations |
| title_short | Reversible iodine vapor capture using bipyridine-based covalent triazine framework: Experimental and computational investigations |
| title_sort | reversible iodine vapor capture using bipyridine based covalent triazine framework experimental and computational investigations |
| topic | Iodine capture Nuclear waste pollution Adsorbent DFT calculations Conjugated polymers |
| url | http://www.sciencedirect.com/science/article/pii/S2666821121000661 |
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