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首页> 外文期刊>RSC Advances >Pure-silica ZSM-22 zeolite rapidly synthesized by novel ionic liquid-directed dry-gel conversion
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Pure-silica ZSM-22 zeolite rapidly synthesized by novel ionic liquid-directed dry-gel conversion

机译：新型离子液体定向干凝胶转化法快速合成纯二氧化硅ZSM-22沸石

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摘要

Shortening the crystallization process of zeolites is significant for their applications because of the energy savings. Here, we report a rapid synthetic route for pure-silica ZSM-22 zeolite with TON topology. The synthesis was achieved by dry-gel conversion, where the dry gel was prepared under an unusual acidic condition for hydrolyzing the silica precursor with 1,3-alkylimidazolium ionic liquid as the structure-directing agent (SDA). Highly crystallized pure-silica ZSM-22 can be synthesized within 2 days of crystallization, dramatically shorter than 10% of the conventional hydrothermal strategy. Using a similar procedure, Al-containing ZSM-22 can also be synthesized by simply adding aluminum salt in the initial gel. In addition, understanding of the structure-directing role of ionic liquids is attempted through characterizations of IR, TG, H-1 and C-13 NMR spectra.
机译：由于节省了能量，缩短沸石的结晶过程对其应用具有重要意义。在这里，我们报告了具有TON拓扑结构的纯二氧化硅ZSM-22沸石的快速合成路线。合成是通过干凝胶转化来实现的，其中干凝胶是在不寻常的酸性条件下制备的，该水解条件是用1,3-烷基咪唑鎓离子液体作为结构导向剂（SDA）水解二氧化硅前体。高度结晶的纯二氧化硅ZSM-22可以在结晶后2天内合成，大大短于传统水热法的10％。使用类似的方法，也可以通过在初始凝胶中简单地添加铝盐来合成含铝的ZSM-22。此外，试图通过表征IR，TG，H-1和C-13 NMR光谱来了解离子液体的结构指导作用。

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