A powerful structure-directing agent for the synthesis of nanosized Al- and high-silica zeolite Beta in alkaline medium
A powerful structure-directing agent for the synthesis of nanosized Al- and high-silica zeolite Beta in alkaline medium
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DOI：
10.1016/j.micromeso.2010.08.025
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发表时间：
2011-06-01
影响因子：
5.2
通讯作者：
Bein, Thomas
中科院分区：
文献类型：
--
作者：
Larlus, Olivier;Mintova, Svetlana;Bein, Thomas
使用4,4'-三亚甲基双(N-甲基,N-苄基哌啶鎓)阳离子作为结构导向剂(SDA)合成了纯硅质和含铝纳米β沸石(BEA)晶体。研究了合成参数（合成时间和温度、加热源）以及前体凝胶的化学组成对产物性质及其粒径的影响。纯硅质纳米沸石 Beta 的粒径约为 140 nm，单域尺寸约为 30 nm，以高水平的重现性合成，并在胶体悬浮液中稳定。含铝β沸石（Al-BEA）晶体是在常规水热处理或微波辐射下制备的。获得了尺寸为 200 nm 的 Al-BEA 颗粒的稳定胶体悬浮液，由 5-15 nm 范围内的单域组成，具体取决于加热模式的性质。 (C) 2010 Elsevier Inc. 保留所有权利。
Purely siliceous and Al-containing nano-zeolite Beta (BEA) crystals were synthesized using 4,4'-trimethylenebis(N-methyl, N-benzyl-piperidinium) cations as structure-directing agent (SDA). The influence of the synthesis parameters (synthesis time and temperature, heating source) as well as the chemical composition of the precursor gel on the nature of the product and its particle size was investigated. Purely siliceous nano-zeolite Beta with a particle size of around 140 nm and single domains of around 30 nm in size was synthesized with a high level of reproducibility and stabilized in colloidal suspension. Aluminium-containing Beta zeolite (Al-BEA) crystals were prepared either under conventional hydrothermal treatment or under microwave irradiation. Stable colloidal suspensions of Al-BEA particles with a size of 200 nm were obtained, consisting of single domains in the range of 5-15 nm, depending on the nature of the heating mode. (C) 2010 Elsevier Inc. All rights reserved.