Preparation of uniform Silicalite-1 microspheres with large secondary pore architecture using monodisperse porous polystyrene particles as template

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• 作者：Zhuqian Wang ; Jingqi Guan ; Shujie Wu ; Chen Xu ; Yuanyuan Ma ; Jinhua Lei ; Qiubin Kan
• 关键词：Silicalite-1 ; Microspheres ; Porosity ; Polymer ; Polystyrene Particles
• 刊名：Materials Letters
• 出版年：2010
• 出版时间：15 June 2010
• 年：2010
• 卷：64
• 期：11
• 页码：1325-1327
• 全文大小：660 K

文摘

A new method was developed for preparation of silicalite-1 microspheres with uniform diameter about 2.5 μm using monodispersed micron-sized poly- styrene-co-divinylbenzene (PSD) porous particles as template. In this method, the PSD particles were impregnated first with tetraethoxysilane (TEOS) and then with tetrapropylammonium hydroxide (TPAOH). After crystallization and calcination, the silicalite-1 microspheres, possessing a regularly spherical morphology similar to the original silicalite-1, were successfully synthesized. More importantly, the silicalite-1 microspheres have large secondary pores in the range of 40 to 120 nm and high pore volume up to 0.7 cm³g^− 1. All these would facilitate the applications of microspheres in catalysis avoiding diffusion limitation.