Abstract

The sinthesis conditions of a series of monodisperse crystals of ZSM-5 zeolite, silicalite-1, and Fe-silicalite-1 with an average particle size in the range of 30 to 450 nm have been determined. The kinetic features of the silicalite-1 crystallization at low temperatures (60−90°C) and atmospheric pressure have been studied. The effective activation energies of silicalite-1 nucliation and crystal growth have been determined to be 95 ± 7 and 100 ± 7 kJ/mol, respectively. The influence of the synthesis time and temperature as well as the silicon source concentration on the size of the MFI type nanocrystals has been studied.

中文翻译：

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单分散MFI纳米沸石的合成：控制结晶过程

摘要

确定了一系列平均粒径在30至450 nm范围内的ZSM-5沸石，silicalite-1和Fe-silicalite-1的单分散晶体的合成条件。研究了在低温（60-90°C）和大气压下silicalite-1结晶的动力学特征。确定的silicalite-1晶化和晶体生长的有效活化能分别为95±7和100±7 kJ / mol。研究了合成时间和温度以及硅源浓度对MFI型纳米晶体尺寸的影响。