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- Title
Template‐Free Synthesis of Highly b‐Oriented MFI‐Type Zeolite Thin Films by Seeded Secondary Growth.
- Authors
Banihashemi, Fateme; Ibrahim, Amr F. M.; Babaluo, Ali Akbar; Lin, Jerry Y. S.
- Abstract
Highly b‐oriented, closely packed, MFI zeolite films are prepared on seeded stainless‐steel plates using organic template‐free, secondary growth solutions, containing aluminum sulfate as a crystallization agent. The number of a‐oriented twin crystals is significantly reduced, and even eliminated, simply by restricting the pH value of the secondary growth solution to the narrow range of 11.1–11.3. Values of pH can be adjusted through the controlled addition of (NH4)2SO4 or H2SO4 to secondary growth solutions of the composition (1 SiO2:0.57 NaOH:137.5 H2O:0.0050 (Al2(SO4)3⋅18 H2O)) or by simply decreasing the molar composition of NaOH with no extra additives.
- Subjects
ZEOLITES; THIN films; STAINLESS steel; ALUMINUM sulfate; CRYSTALLIZATION
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 8, p2541
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201814248