Postsynthetic High-Alumina Zeolite Crystal Engineering in Organic Free Hyper-Alkaline Media

作者：Van Tendeloo Leen; Wangermez Wauter; Vandekerkhove Annelies; Willhammar Tom; Bals Sara; Maes Andre; Martens Johan A; Kirschhock Christine E A; Breynaert Eric^*

来源：Chemistry of Materials, 2017, 29(2): 629-638.

DOI：10.1021/acs.chemmater.6b04052

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.

• 出版日期2017-1-24