Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10626089 | Ceramics International | 2013 | 9 Pages |
Abstract
Enhanced performance of a macroporous disk alumina support was fabricated through colloidal filtration route, by using α-Al2O3 powder with an average particle size of 1.1 μm. The support, sintered at 1250 °C, showed relative high permeances towards water (101 L hâ1 mâ2 barâ1) and nitrogen (â¼2Ã10â6 mol mâ2 sâ1 Paâ1), with an average surface roughness of â¼175 nm and a high mechanical strength of 61.1 MPa. Titania supported γ-Al2O3 mesoporous layers were deposited onto this promising disk α-Al2O3 support through dip-coating. The disk membrane A1100/TiO2/γ-Al2O3, with pore size of ca. 4.4 nm, showed a pure water flux as high as 4.5 L mâ2 hâ1 barâ1, which is four times higher than that of γ-Al2O3 membrane reported in literature. This mesoporous membrane showed relative high retention rate (â¼80%) towards di-valent cations like Ca2+, Mg2+, but not for the mono-valent cation (Na+).
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hong Qi, Shufeng Niu, Xiaoluo Jiang, Nanping Xu,