Silicon imidonitride aerogel exhibiting macro- and meso-dual porosity

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• 作者：Vincent Rocher^a ; Stephen M. Kelly^a ; ^{s.m.kelly@hull.ac.uk} ; Andrew L. Hector^b
• 关键词：Silicon nitride ; Aerogel ; Sol&ndash ; Gel ; Porosity
• 刊名：Microporous and Mesoporous Materials
• 出版年：2012
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：1 July, 2012
• 卷：156
• 期：Complete
• 页码：196-201
• 文件大小：976 K

摘要

Porous silicon imidonitride aerogels have been produced by combining a sol-gel process based on [Si(NH₂)(NMe₂)₃] and ammonia that is known for producing xerogels with controlled mesoporosity, with a supercritical drying process using diethylamine to minimize collapse of the gel structure. The silicon imidonitride aerogel product takes the form of a porous monolith exhibiting two populations of pores in a hierarchical structure. The mesopores can be linked to the precursor system employed, whilst the macropores are consistent with the porosity of related aerogel systems.