Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9617787 | Microporous and Mesoporous Materials | 2005 | 8 Pages |
Abstract
Nanostructured crystalline γ-alumina was synthesized by a simpler and improved method proposed here from aluminum alkoxide precursor in the presence of a cationic surfactant and controlled amounts of water under hydrothermal conditions without any extra additives such as hydrolysis controlling agents. The material synthesized with a stoichiometric amount of water (H2O/Al = 2) was a mesoporous molecular sieve with a 'wormhole-like' pore structure. With increasing amounts of water (H2O/Al = 10 or 20), bundles of γ-alumina nanofibers were formed, and with H2O/Al > 20, materials with no definite morphology were formed, probably due to too fast hydrolysis of the precursor. The nanostructured materials had high surface areas and a good thermal stability.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Hyun Chul Lee, Hae Jin Kim, Chang Houn Rhee, Kyung Hee Lee, Jae Sung Lee, Soo Hyun Chung,