Preparation for Size-Controlled MOR Zeolite Nanocrystal Using Water/Surfactant/Organic Solvent
Preparation for Size-Controlled MOR Zeolite Nanocrystal Using Water/Surfactant/Organic Solvent
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DOI：
10.1007/s11244-009-9227-z
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发表时间：
2009-04
影响因子：
3.6
通讯作者：
T. Tago;D. Aoki;Kazuyuki Iwakai;T. Masuda
中科院分区：
文献类型：
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作者：
T. Tago;D. Aoki;Kazuyuki Iwakai;T. Masuda
近年来，纳米沸石晶体的合成引起了众多研究者的关注。本研究以水/表面活性剂/有机溶剂为反应体系，采用水热法合成了丝光沸石（莫尔）纳米晶。聚氧乙烯-（15）-油醚（O-15，非离子表面活性剂）和环己烷分别作为表面活性剂和有机溶剂。有趣的是，发现莫尔沸石的晶体尺寸和形态取决于表面活性剂浓度，而不管水溶液中的Si和Al源和模板剂的浓度相同。可以得到平均粒径约为80 nm的莫尔沸石纳米晶。在较高的表面活性剂浓度（0.75 mol/L）下，莫尔分子筛也呈现出柱状形貌。因此，莫尔沸石的晶体尺寸和形态可以通过表面活性剂浓度来控制。这一结果似乎是由于溶液中莫尔的成核和生长速率的差异。
Recently, the synthesis of nanometer-sized zeolite crystals has attracted considerable attention from many researchers. In this study, the preparation of Mordenite (MOR zeolite) nanocrystals via hydrothermal synthesis in water/surfactant/organic solvent was carried out. Polyoxyethylene-(15)-oleylether (O-15, non-ionic surfactant) and cyclohexane were employed as a surfactant and organic solvent, respectively. Interestingly, it was found that the crystal sizes and morphology of MOR zeolites depended on the surfactant concentration regardless of the same concentrations of Si and Al sources and template in the water solution. The MOR zeolite nanocrystals with average sizes of approximately 80 nm could be obtained. Moreover, the column-like morphology of MOR zeolite was also observed at a high surfactant concentration (0.75 mol/L). Accordingly, the crystal size and morphology of MOR zeolite can be controlled by the surfactant concentration. This result appears to be due to the difference in the nucleation and growth rates of MOR in the solution.