Downsizing AFX Zeolite Crystals to Nanoscale by a Postmilling Recrystallization Method

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• 作者：Hiroki Yamada ; Takayuki Iida ; Zhendong Liu ; Yusuke Naraki ; Koji Ohara ; Shinji Kohara ; Tatsuya Okubo ; Toru Wakihara
• 刊名：Crystal Growth & Design
• 出版年：2016
• 出版时间：June 1, 2016
• 年：2016
• 卷：16
• 期：6
• 页码：3389-3394
• 全文大小：432K
• 年卷期：0
• ISSN：1528-7505

文摘

Downsizing zeolites to obtain nanosized crystals for circumventing problems regarding molecular diffusion is a critical method for enhancing their functionalities, and therefore, such an approach has been the focus of significant attention. Here, we applied the postmilling recrystallization method for reducing the AFX aluminosilicate zeolite crystal sizes to the nanoscale. Highly crystalline AFX zeolite particles with crystal sizes smaller than 100 nm were obtained by the postmilling recrystallization method using the supernatant solution acquired during the preparation of the ingredient raw crystals used for the milling. The prepared AFX zeolite nanocrystals were found to possess better ion-exchange performance than micrometer-sized counterparts, highlighting the improved accessibility of the cations inside the micropores.