Vapor assisted ¡°in situ?transformation of mesoporous carbon-silica composite for hierarchically porous zeolites

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• 作者：Chunfeng Xue ; Fan Zhang ; ^{zhang_fan@fudan.edu.cn} ; Limin Wu ; Dongyuan Zhao
• 关键词：Hierarchical pore ; Zeolite ; Composite template ; Preparation ; ZSM-5
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 出版时间：15 March, 2012
• 年：2012
• 卷：151
• 期：Complete
• 页码：495-500
• 全文大小：878 K

文摘

Ordered mesoporous carbon-silica composite was ¡°in situ?transformed into hierarchically porous zeolites ZSM-5 (H-ZSM-5) under water vapor, which synthesized from evaporation induced ¡°tri-constituent?co-assembly of resin, silica and surfactant. The vapor assisted transformation was realized within 2-D hexagonally mesochannels of carbon-silica composite infused with tetrapropylammonium hydroxide at 130 ¡ãC for 72 h. The calcined H-ZSM-5-570 possesses a mesostructure with mean pore sizes of 0.6 and 9.0 nm, BET surface area of 409 cm²/g, and pore volume of 0.54 cm³/g. High-resolution TEM images of H-ZSM-5-570 display that mesoporous walls consisted of zeolite nanocrystals of about 6 nm in the same domain. Weak acidity of H-ZSM-5-570 has also been concluded from ammonia desorption measurements.