Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine
Abstract Herein hyperbranched polyethyleneimine (hPEI) cryogels are reported for the selective and reversible adsorption of elemental chlorine. The cryogels are prepared in an aqueous solution by crosslinking with glutaraldehyde at subzero temperatures. The final macroporous composites bearing ammon...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202414274 |
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| author | Alejandro Lorente Johanna S. Sturm Merlin Kleoff Fabio Lorenz Patrick Voßnacker Olaf Wagner Rainer Haag Sebastian Riedel |
| author_facet | Alejandro Lorente Johanna S. Sturm Merlin Kleoff Fabio Lorenz Patrick Voßnacker Olaf Wagner Rainer Haag Sebastian Riedel |
| author_sort | Alejandro Lorente |
| collection | DOAJ |
| description | Abstract Herein hyperbranched polyethyleneimine (hPEI) cryogels are reported for the selective and reversible adsorption of elemental chlorine. The cryogels are prepared in an aqueous solution by crosslinking with glutaraldehyde at subzero temperatures. The final macroporous composites bearing ammonium chloride groups are obtained after freeze‐drying. The cryogels CG1[Cl]–CG3[Cl] adsorb chlorine with capacities of 0.22–0.26 g Cl2/g cryogel as an average over three adsorption‐desorption cycles. The adsorption process is based on the reversible and selective halogen bonding of chlorides (Cl−) with chlorine (Cl2) forming the corresponding trichloride ([Cl3]−) species, indicated by Raman spectroscopy. The reversibility of chlorine adsorption is shown by applying heat and vacuum to the loaded cryogel CG1[Cl3] releasing 63% of the adsorbed chlorine within 3 h and 72% within 16 h. The unique ability to selectively adsorb chlorine in the presence of other gases is successfully employed for the selective adsorption of chlorine from a gas mixture, potentially enabling the recycling of chlorine from tail gas streams. |
| format | Article |
| id | doaj-art-a54efddfb51a4fbc86ed290df2a4a919 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-a54efddfb51a4fbc86ed290df2a4a9192025-08-20T03:49:36ZengWileyAdvanced Science2198-38442025-02-01128n/an/a10.1002/advs.202414274Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of ChlorineAlejandro Lorente0Johanna S. Sturm1Merlin Kleoff2Fabio Lorenz3Patrick Voßnacker4Olaf Wagner5Rainer Haag6Sebastian Riedel7Freie Universität Berlin Institut für Chemie und Biochemie – Organische Chemie Takustr. 3 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Organische Chemie Takustr. 3 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Organische Chemie Takustr. 3 14195 Berlin GermanyFreie Universität Berlin Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyAbstract Herein hyperbranched polyethyleneimine (hPEI) cryogels are reported for the selective and reversible adsorption of elemental chlorine. The cryogels are prepared in an aqueous solution by crosslinking with glutaraldehyde at subzero temperatures. The final macroporous composites bearing ammonium chloride groups are obtained after freeze‐drying. The cryogels CG1[Cl]–CG3[Cl] adsorb chlorine with capacities of 0.22–0.26 g Cl2/g cryogel as an average over three adsorption‐desorption cycles. The adsorption process is based on the reversible and selective halogen bonding of chlorides (Cl−) with chlorine (Cl2) forming the corresponding trichloride ([Cl3]−) species, indicated by Raman spectroscopy. The reversibility of chlorine adsorption is shown by applying heat and vacuum to the loaded cryogel CG1[Cl3] releasing 63% of the adsorbed chlorine within 3 h and 72% within 16 h. The unique ability to selectively adsorb chlorine in the presence of other gases is successfully employed for the selective adsorption of chlorine from a gas mixture, potentially enabling the recycling of chlorine from tail gas streams.https://doi.org/10.1002/advs.202414274adsorptionchlorinecryogelspolychloridespolymers |
| spellingShingle | Alejandro Lorente Johanna S. Sturm Merlin Kleoff Fabio Lorenz Patrick Voßnacker Olaf Wagner Rainer Haag Sebastian Riedel Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine Advanced Science adsorption chlorine cryogels polychlorides polymers |
| title | Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine |
| title_full | Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine |
| title_fullStr | Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine |
| title_full_unstemmed | Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine |
| title_short | Polyethyleneimine‐Based Cryogels Enabling the Selective and Reversible Adsorption of Chlorine |
| title_sort | polyethyleneimine based cryogels enabling the selective and reversible adsorption of chlorine |
| topic | adsorption chlorine cryogels polychlorides polymers |
| url | https://doi.org/10.1002/advs.202414274 |
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