期刊
JOURNAL OF MEMBRANE SCIENCE
卷 174, 期 1, 页码 123-133出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0376-7388(00)00380-X
关键词
inorganic membrane; ceramic membranes; titania membranes; nanofiltration
Microporous TiO2 membranes were developed by a polymeric sol-gel technique on top of a specially designed tubular ceramic multi-layer support. The microporosity of the membrane is 28% and depends strongly on the amorphous state of the TiO2. N-2-sorption measurements indicated cylindrical pores with a mean diameter of 0.9 nm which was confirmed by filtration tests using molecular weight standards. The membrane has a cut off of 480 Da and a pure water flux of 20 l/(m(2) h bar). Salt retention depends on the pH and the salt concentration. At a pH above 5.8, the retention of sulphate ions is more than 90%. (C) 2000 Elsevier Science B.V, All rights reserved.
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