Well-defined silicalite-1 crystals with intracrystalline mesopores were successfully synthesized in the presence of 3-glycidoxypropyl-trimethoxysilane (GPTMS) and polyethylene glycol (PEG) from a hydrothermal synthetic system. Various techniques, such as XRD, SEM, TEM, TGA, and Ar adsorption, were used to characterize the textural properties of the obtained hierarchical silicalite-1. The results indicated that the addition of GPTMS to the silicalite-1 synthesis system could bring some mesopores in the silicate-1 crystals. While PEG, as a mesoporogen, was added along with GPTMS, silicalite-1 crystals with abundant intramesoporosity were obtained. The liquid-phase absorption of xylene isomers (p/o) on the hierarchical silicalite-1 indicated that the hierarchical silicalite-1 showed better absorption properties in terms of both adsorption rate and capacity for p-xylene, compared to silicalite-1 crystals synthesized in the absence of GPTMS and PEG.

在 3-环氧丙氧基丙基-三甲氧基硅烷 (GPTMS) 和聚乙二醇 (PEG) 的存在下，水热合成系统成功合成了具有晶内介孔的明确硅石-1 晶体。各种技术，如XRD、SEM、TEM、TGA和Ar吸附，被用来表征所获得的分级硅沸石-1的织构特性。结果表明，在硅沸石1合成体系中加入GPTMS可以在硅酸盐1晶体中产生一些介孔。当PEG作为介孔剂与GPTMS一起加入时，获得了具有丰富介孔率的硅沸石-1晶体。