Downsizing AFX zeolite crystals to nanoscale by post-milling recrystallization method
Downsizing AFX zeolite crystals to nanoscale by post-milling recrystallization method
复制标题
通过球磨后重结晶方法将 AFX 沸石晶体缩小至纳米级
DOI：
10.1021/acs.cgd.6b00365
复制
发表时间：
2016
影响因子：
3.8
通讯作者：
Toru Wakihara
中科院分区：
文献类型：
--
作者：
Hiroki Yamada;Takayuki Iida;Zhendong Liu;Yusuke Naraki;Koji Ohara;Shinji Kohara;Tatsuya Okubo;Toru Wakihara
减小沸石尺寸以获得纳米级晶体以规避关于分子扩散的问题是增强其功能性的关键方法，因此，这种方法一直是显著关注的焦点。在这里，我们应用研磨后重结晶方法将AFX铝硅酸盐沸石晶体尺寸减小到纳米级。通过研磨后重结晶方法，使用在制备用于研磨的原料晶体的过程中获得的上清液溶液，获得晶体尺寸小于100 nm的高度结晶的AFX沸石颗粒。发现制备的AFX沸石纳米晶体具有比微米尺寸的对应物更好的离子交换性能，突出了微孔内阳离子的可及性的改善。
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.