Synthesis of nanostructured gamma-alumina with a cationic surfactant and controlled amounts of water
SCIE
SCOPUS
- Title
- Synthesis of nanostructured gamma-alumina with a cationic surfactant and controlled amounts of water
- Authors
- Lee, HC; Kim, HJ; Rhee, CH; Lee, KH; Lee, JS; Chung, SH
- Date Issued
- 2005-04-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Nanostructured crystalline gamma-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 gamma-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. (c) 2004 Elsevier Inc. All rights reserved.
- Keywords
- alumina; nanostructured; mesoporous; hydrothermal synthesis; surfactants; ORGANIZED MESOPOROUS ALUMINA; MOLECULAR-SIEVES; ASSISTED SYNTHESIS; METAL-OXIDES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24676
- DOI
- 10.1016/j.micromeso.2004.10.021
- ISSN
- 1387-1811
- Article Type
- Article
- Citation
- MICROPOROUS AND MESOPOROUS MATERIALS, vol. 79, no. 1-3, page. 61 - 68, 2005-04-01
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- There are no files associated with this item.
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