Seed-directed, rapid synthesis of MAZ-type zeolites without using organic structure-directing agent
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- 作者：Akari Ogawa ; Kenta Iyoki ; Yoshihiro Kamimura ; Shanmugam Palani Elangovan ; Keiji Itabashi ; Tatsuya Okubo
- 关键词：MAZ-type zeolite ; Omega ; Seed-directed ; Synthesis ; Organic structure-directing agent-free
- 刊名：Microporous and Mesoporous Materials
- 出版年：1 March, 2014
- 年：2014
- 卷：186
- 期：Complete
- 页码：21-28
- 全文大小：1614 K
文摘
MAZ-type zeolites (omega) were successfully obtained for the first time using a seed-directed, organic structure-directing agent-free synthesis method according to the 鈥淐omposite Building Unit Hypothesis鈥?surprisingly in a short period (ca. 30 h) of hydrothermal treatment. The obtained product showed textural and acidic properties that were superior to the omega seed crystals synthesized using tetramethylammonium hydroxide as an organic structure-directing agent. Therefore, we believe the new technique is an efficient and environmentally friendly process for the preparation of MAZ-type zeolites for their use as adsorbents, catalysts, and so on. In addition, the 鈥淐omposite Building Unit Hypothesis鈥?was confirmed to be applicable for the synthesis of 4R-rich zeolites in the (Na, K)-aluminosilicate system.