IM-5分子筛空心球的合成与表征

Synthesis and characterization of IM-5 molecular sieve hollow spheres

通过向水热体系中引入表面活性剂制备了IM-5分子筛空心球。该空心球的直径约6μm,孔壁由30nm～150nm的小晶粒IM-5构成,小晶粒之间堆积形成介孔/大孔孔隙。所得产物的BET比表面积为366m2/g,在微孔区间具有三个集中的孔分布。空心球的形成与分子筛前驱凝胶粒子与表面活性剂电荷的相互作用及其胶束机制有关。

IM-5 molecular sieve hollow sphere has been prepared by adding the surfactant into hydrothermal system.The molecular sieve hollow sphere is about 6 μm in diameter,the hole wall is composed of nano IM-5 particles with sizes of 30 nm～150 nm,that resulting in many meso-and macro-textures.A BET specific surface area of 366 m2/g was calculated by nitrogen adsorption measurement.At the same time,there are 3 narrow pore sizes distribution in micropore region.The formation of hollow spheres is related to the interaction and micelles mechanism of charges in the surfactant and precursor particles of IM-5.