Postsynthetic High-Alumina Zeolite Crystal Engineering in Organic-Free Hyper-Alkaline Media
| Autor: | Eric Breynaert, Johan A. Martens, Christine E. A. Kirschhock, Sara Bals, Tom Willhammar, Leen Van Tendeloo, Annelies Vandekerkhove, Wauter Wangermez, André Maes |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Crystal chemistry Physics General Chemical Engineering Sorption 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Crystal engineering 01 natural sciences 0104 chemical sciences Chemistry Waste Disposal Facility Chemical engineering Aluminosilicate Materials Chemistry 0210 nano-technology Zeolite Porosity |
| Zdroj: | Chemistry of materials |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.6b04052 |
| Popis: | Postsynthetic modification of high -alumina zeolites in hyper alkaline media can be tailored toward alteration of framework topology, crystal size and morphology, or desired Si/A1 ratio. FAU, EMT, MAZ, KFI, HEU, and LTA starting materials were treated with 1.2 M MOH (M = Na, K, RE, or Cs), leading to systematic ordered porosity or fully transformed frameworks with new topology and adjustable Si/Al ratio. In addition to the versatility of this tool for zeolite crystal engineering, these alterations improve understanding of the crystal chemistry. Such knowledge can guide further development in zeolite crystal engineering. Postsynthetic alteration also provides insight on the long-term stability of aluminosilicate zeolites that are used as a sorption sink in concrete -based waste disposal facilities in harsh alkaline conditions. |
| Databáze: | OpenAIRE |
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