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Evolution of Pore Structure in Microporous Silica Membranes: Sol‐Gel Procedures and Strategies
Author(s) -
Nair Balagopal N.,
Keizer Klaas,
Okubo Tatsuya,
Nakao ShinIchi
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199802)10:3<249::aid-adma249>3.0.co;2-v
Subject(s) - membrane , microporous material , materials science , permeation , sol gel , chemical engineering , fuel cells , gas separation , nanotechnology , composite material , chemistry , engineering , biochemistry
Silica membranes exhibiting excellent molecular sieving capability , which would find applications in fuel‐cell electric vehicles with on‐board hydrogen generation, for example, are the aim of the sol‐gel strategies outlined here. It is shown that optimization of the sol‐gel synthesis parameters is important in order to achieve membranes with minimum defects and hence high selectivity. The preparation of the supported membranes is described and the gas permeation behavior of membranes made from different sol compositions reported.