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首页> 外文期刊>Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology >A micro/mesoporous aluminosilicate: key factors affecting framework crystallization during steam-assisted synthesis and its catalytic property
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A micro/mesoporous aluminosilicate: key factors affecting framework crystallization during steam-assisted synthesis and its catalytic property

机译：微/中硅铝硅酸盐：影响蒸汽辅助合成过程中骨架结晶的关键因素及其催化性能

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摘要

A hierarchical micro/mesoporous aluminosilicate has been synthesized using an optimized steam-assisted crystallization method, by which the material shows perfect crystallization of zeolite frameworks and relatively high surface area and meso/rnicropore volumes. Key factors for the crystallization of mesoporous frameworks in the process, especially the gel drying temperature, and role of triethanolamine as mesopore template, which have not been addressed before, were identified for the successful synthesis of the hierarchical structure in detail. An energy level schematic was proposed to illustrate the role of the gel drying temperature by affecting the condensation level of the -Si-O-network in the mesoporous framework. Alteration of the experimental conditions within a certain range can yield mesoporous zeolites with varied structure properties, such as surface area, pore volume and pore size. Such hierarchical structures possess remarkably higher catalytic activity in aldol condensation reaction than both amorphous mesoporous materials and conventional ZSM-5 zeolite.
机译：已经使用优化的蒸汽辅助结晶方法合成了分级的微孔/中孔铝硅酸盐，通过该方法，该材料显示出沸石骨架的完美结晶以及相对较高的表面积和中/微孔体积。为了成功地详细地合成分级结构，已确定了该过程中介孔骨架结晶的关键因素，尤其是凝胶干燥温度，以及三乙醇胺作为介孔模板的作用，这些以前尚未得到解决。提出能级示意图以通过影响介孔骨架中-Si-O-网络的缩合度来说明凝胶干燥温度的作用。在一定范围内改变实验条件可以产生具有不同结构特性的中孔沸石，例如表面积，孔体积和孔径。这样的分级结构在醛醇缩合反应中具有比无定形介孔材料和常规ZSM-5沸石明显更高的催化活性。

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