Direct syntheses of ordered SBA-15 mesoporous materials containing arenesulfonic acid groups

来自掌桥科研

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阅读量：

302

作者：

JA Melero，GD Stucky，R Van Grieken，G Morales

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摘要：

SBA-15 mesoporous silica has been functionalized with arenesulfonic acid groups by means of a one-step simple synthesis approach involving co-condensation of tetraethoxysilane TEOS and 2-4-chlorosulfonylphenylethyltrimethoxysilane CSPTMS in the presence of a polyalkylene oxide block copolymer Pluronic 123 under acid silica-based catalysis. The resultant materials show hexagonal mesoscopic order and pores sizes up to 60 , with acid exchange capacities ofca.1.3 mequiv. Hper g SiO2and surface areas up to 600 m2g1. The sulfonic groups anchored to the silica surface of the pore walls are thermally stable to temperatures up to 380 °C and resistant to leaching in organic and aqueous solutions under mild conditions.31P MAS NMR measurements of chemically adsorbed triethylphosphine oxide and the catalytic properties confirm the presence of Brnsted acid centers in these mesoporous materials containing arenesulfonic acid groups that are stronger than those found in propanesulfonic-modified SBA-15 and Al-MCM-41.

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关键词：

sodium polyacrylate alumina viscometry zeta potential particle size

DOI：

10.1039/b110598c

被引量：

1124

年份：

2002