Tailoring Pore Structure and Morphologies in Covalent Organic Frameworks for Xe/Kr Capture and Separation
| العنوان: | Tailoring Pore Structure and Morphologies in Covalent Organic Frameworks for Xe/Kr Capture and Separation |
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| المؤلفون: | Shuao Wang, Mengjia Yuan, Xia Wang, Linwei He, Wei Liu, Mingxing Zhang, Fuyin Ma, Long Chen |
| المصدر: | Chemical Research in Chinese Universities. 37:679-685 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Pore size, Materials science, Sorption, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Adsorption, Covalent bond, Atom, Physical chemistry, 0210 nano-technology, Selectivity, Porosity, Kinetic diameter |
| الوصف: | As a rising star among porous solid materials, covalent organic frameworks(COFs) with excellent properties including but not limit to facilely controllable structure, high porosity, and multi-chemical functionality represent significant potential for efficient 127Xe/85Kr capture and separation. In this study, through tuning the length of the organic ligands, two-dimensional(2D) COF materials with identical connection group but different pore properties, denoted as ATFG-COF and TpPa-COF with AA-stacking model and TpBD-COF with AB-stacking model were synthesized and tested for Kr and Xe adsorption for the first time. Adsorption measurements indicate that the narrower pore apertures and higher porosity are conducive for COF materials to capture Xe and Kr. Furthermore, the Henry’s constant, isosteric heat of adsorption(Qst), and ideal adsorbed solution theory(IAST) selectivity of ATFG-COF, the pore size of which is closest to the kinetic diameter of the Xe atom(0.41 nm) among 2D COF materials, were carried out based on the single component sorption isotherms. The results illustrate that the high isosteric heat values of Xe/Kr adsorption on ATFG-COF are 25 and 16 kJ/mol at room temperature, respectively. Henry’s law predicts that the selectivity factor of Xe to Kr is 6.07, consistent with the adsorption selectivity(ca. 6) calculated based on the IAST. |
| تدمد: | 2210-3171 1005-9040 |
| DOI: | 10.1007/s40242-021-1064-z |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::97afd225d6e297c78c39bd7c366776f4 https://doi.org/10.1007/s40242-021-1064-z |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........97afd225d6e297c78c39bd7c366776f4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 22103171 10059040 |
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| DOI: | 10.1007/s40242-021-1064-z |