期刊
NEW JOURNAL OF CHEMISTRY
卷 33, 期 11, 页码 2255-2260出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b9nj00351g
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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.
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