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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Ordered Micro/Mesoporous Composite Prepared as Thin Films
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Ordered Micro/Mesoporous Composite Prepared as Thin Films

机译：以薄膜形式订购的微孔/中孔复合材料

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摘要

A new synthesis method for preparation of thin films and powders consisting of zeolite beta nanocrystals embedded in ordered mesoporous silica matrix is described.The final structures possessing bimodal porosity,i.e.,high degree of mesophase order and spatially defined microporous zeolite nanocrystals are obtained via simultaneous solvent evaporation of preformed silica/surfactant/ethanolanosized zeolite beta assemblies.The films were characterized with grazing-incident diffraction (GID),nitrogen sorption based on gravimetric measurements with quartz crystal microbalance (QCM) devices,and transmission electron microscopy (TEM).It is shown that the incorporation of beta nanocrystals in the mesoporous silica matrix and the mesophase order itself can be controlled through the variation of the fractional amounts of the zeolite nanoparticles and silica/surfactant solutions.The HR-TEM measurements showed that the nanosized Beta microporous crystals are separated and at the same time connected through an ordered mesostructured matrix.
机译：描述了一种新的合成方法，该方法用于制备包埋在有序介孔二氧化硅基质中的β沸石纳米晶组成的薄膜和粉末。最终结构具有双峰孔隙，即中间相度高，并且通过同时溶剂获得了空间确定的微孔沸石纳米晶薄膜具有掠入射衍射（GID），基于石英晶体微天平（QCM）的重量法测量氮吸收和透射电子显微镜（TEM）的特性。结果表明，可以通过改变沸石纳米颗粒和二氧化硅/表面活性剂溶液的分数来控制介孔二氧化硅基质中β纳米晶体的掺入和中间相顺序本身.HR-TEM测量表明，纳米大小的β微孔晶体被分离并且同时连接通过有序的介观结构矩阵。

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