基于水热法合成介孔分子筛MCM-41.ppt

* Synthesis of MCM-41 Based on the Hydrothermal Method Reporter：胡志辉 SMembers：兰春锋 S 尹金伟 S 韩 达 S Introduction of MCM-41 1 General synthesis of MCM-41 4 Preparation of MCM-41 by Hydrothermal 3 2 Outline Characterization 5 Future work 1 Introduction Properties of MCM-41 Chemical compositions Structure Ordered porous structure with diameters ranging from 2 to 20nm Large special surface areas Hexagonal tube Applications of MCM-41 Applied as Catalysts directly Applied as desiccants（干燥剂） Applied as carriers of some catalysts, energy materials and medicine Applied as filters in polluted disposal Potential applications in magnetism and optical fields 2 General synthesis of MCM-41 ★ Room temperature method ★ Microwave synthesis method ★ Calcining a wet surfactant containing silicate gel ★ High temperature calcination ★ Phase transformation method ★ hydrothermal method …… the best way 2 General synthesis of MCM-41 Hydrothermal method high temperature (100°C) high pressure (self-pressure) Advantages effective solvent capabilities uniform mixing and dissolution of the gel high nucleation and crystallization rate Steps of synthesis prodution of the hydroted gel supersaturation of dissolved gel crystallization of the products 3 Preparation of MCM-41 by Hydrothermal Mixing CTAB Deionized water Regulation of the PH Crystallization(24h) Washfilter, drying Calciation (NH4)6Mo7O24·4H2O Na2SiO3 Experimental reagent: (NH4)6Mo7O24·4H2O CTAB Na2SiO3 HCl HNO3 C6H5CH3 CH3CH2OH (NH4)3PMo12O40 H2O Detail imformation of the synthesis of MCM 3 Preparation of MCM-41 by Hydrothermal 图3-1 溶液生长法制备MoO3/MCM-41实验装置图 The formation mechanism of mesoporous molecular sieves liquid-crystal templating mechanism（LCT） Surfactant liquid crystal phase as the template of the structure of MCM-41 The formation of liquid crystal phase Before the condensation of Inorga