One-step synthesis of hierarchical porous ¦Ã-alumina with high surface area

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• 作者：Norihiro Suzuki and Yusuke Yamauchi
• 关键词：γ ; Alumina ; Porous material ; Mesoporous material ; Hierarchical pore system
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2010
• 出版时间：February, 2010
• 年：2010
• 卷：53
• 期：2
• 页码：428-433
• 全文大小：457.7 KB

文摘

Hierarchical porous γ-alumina is successfully fabricated from a precursor solution consisting of surfactants, polystyrene (PS) spheres, inorganic salts and solvents. After calcinations, uniform macropores are closely packed. The macropore size coincides with the original PS sphere size. These macropores are connected by small windows. In addition, the macropore walls have mesoporous structures, as confirmed by SAXS measurement and TEM observation. After calcination at 900 ¡ãC, the amorphous alumina frameworks are converted to the crystallized γ-alumina phase. Even after crystallization, the existence of uniform mesopores and high surface are well retained, though the mesoporous ordering is lower.