Preparation of γ-Al2O3 film by high temperature transformation of nanosized γ-AlOOH precursors

被引：26
|
作者：
Mathieu, Yannick [1 ]
Vidal, Loic [1 ]
Valtchev, Valentin [1 ]
Lebeau, Benedicte [1 ]
机构：
[1] Univ Haute Alsace, ENSCMu 3, Equipe Mat Porosite Controlee MPC, IS2M,LRC CNRS 7228, F-68093 Mulhouse, France
来源：
NEW JOURNAL OF CHEMISTRY | 2009年 / 33卷 / 11期
关键词：
FIBROUS BOEHMITE SOL; ALUMINA MEMBRANE; SUSPENSIONS; FABRICATION; MORPHOLOGY; TRANSPORT; COATINGS; SURFACE; RODS;
D O I：
10.1039/b9nj00351g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Mesoporous boehmite (gamma-AlOOH) and gamma-alumina (gamma-Al2O3) self-supported films were prepared by high temperature transformation of gamma-AlOOH precursor fibers. A polymer, sodium polyacrylate, was used as a size/ morphology controlling agent yielding to a stable colloidal suspension of boehmite ribbon-like fibers after a 168 h hydrothermal treatment at 160 degrees C. The slow evaporation of the solvent leads to gamma-AlOOH film without any cracks and pinholes. The gamma-Al2O3 film, obtained after calcination of the gamma-AlOOH film, exhibit a high thermal stability up to 1000 degrees C and two distinct kinds of mesopores with average diameters of 20-30 angstrom and 50 angstrom. Structural and textural properties of these films confer them interesting properties for filtration processes.
引用
收藏
页码：2255 / 2260
页数：6
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