Synthesis of γ-Ga2O3-Al2O3 Solid Solutions by the Glycothermal Method

The reaction of mixtures of aluminum isopropoxide and gallium acetylacetonate in 1,4‐butanediol or 1,5‐pentanediol at high temperatures (glycothermal reaction) directly gave the γ‐Ga2O3–Al2O3 solid solutions, which had high catalytic activities for selective reduction of NO using methane as the redu...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2006-07, Vol.89 (7), p.2158-2166
Main Authors: Takahashi, Masaru, Inoue, Noriyuki, Takeguchi, Tatsuya, Iwamoto, Shinji, Inoue, Masashi, Watanabe, Tsunenori
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The reaction of mixtures of aluminum isopropoxide and gallium acetylacetonate in 1,4‐butanediol or 1,5‐pentanediol at high temperatures (glycothermal reaction) directly gave the γ‐Ga2O3–Al2O3 solid solutions, which had high catalytic activities for selective reduction of NO using methane as the reducing agent. However, the reaction with a higher Al/(Ga+Al) charged ratio yielded the glycol derivative of boehmite as a by‐product and the catalytic activity of the solid solution decreased. Therefore, synthesis of the solid solution using various glycols was examined and it was found that solid solutions with high Al contents without contamination of the glycol derivative of boehmite were obtained by using 1,6‐hexanediol as a reaction medium. The solid solution exhibited a higher NO conversion than that synthesized in other glycols.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2006.01060.x