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论文类型：期刊论文

发表时间：2009-07-01

发表刊物：MICROPOROUS AND MESOPOROUS MATERIALS

收录刊物：SCIE

卷号：123

期号：1-3

页面范围：221-227

ISSN号：1387-1811

关键字：Disordered micro-mesoporous molecular sieve; ZSM-5/KIT-1; Crystallization temperature

摘要：A direct method to controlled synthesis of micro-mesoporous ZSM-5/KIT-1 molecular sieves using dual templates is reported. The framework structure, porosity and morphology of the obtained materials were characterized by X-ray diffraction, infrared spectroscopy, UV-Raman spectroscopy, N(2) adsorption isotherm, and electron microscopy (SEM and TEM). it was found that the crystallization temperature is a key to control the framework structure as well as the morphology and hydrothermal stability. Two-phase structure is more favored at higher temperatures, while pure mesophase structure with ZSM-5 building units is formed at lower temperatures. The ZSM-5/KIT-1 crystallized at 130 degrees C possesses excellent micro-mesoporous structure and good hydrothermal stability. This type of material has a disordered three-dimensional micro-mesopore network structure with narrow pore size distribution and high surface area, which will provide new opportunities for catalytic reactions involving large molecules. (C) 2009 Elsevier Inc. All rights reserved.