Oriented zeolite MFI monolayer films on metal substrates by in situ crystallization

✍ Scribed by Zhengbao Wang; Yushan Yan

• Book ID: 104430506
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 494 KB
• Volume: 48
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(01)00357-2

✦ Synopsis

Continuous b-oriented zeolite MFI monolayer ®lms (<0.4 lm thick) were prepared by in situ crystallization on metal substrates (stainless steel and aluminum alloy) using a synthesis solution 0.32TPAOH:TEOS:165H 2 O (TPAOH: tetrapropylammonium hydroxide, TEOS: tetraethylorthosilicate). Eects of crystallization temperature and time, surface roughness, position and chemical nature of the substrate, and aging time of the synthesis solution were investigated and a mechanism for the b-oriented monolayer thin ®lm formation was discussed. The supported ®lms were characterized with scanning electron microscopy and X-ray diraction. Polishing of the ®lm with a normal lab polisher leads to a continuous ultrathin zeolite ®lm with a surface roughness less than 0:05 lm.