Is Physisorption Useful for Fine Pore Structure Control? Control of Pore Structure and Properties of SBA-15 by Paraffin Physisorption

A simple method for controlling the pore structure and properties of ordered mesoporous silica (OMS) by the physisorption of organic molecules is reported. The paraffin-modified OMSs were characterized by N2 gas and water vapor adsorption isotherms, small-angle X-ray scattering, and infrared spectro...

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Veröffentlicht in:	Chemistry letters 2018-01, Vol.47 (1), p.27-30
Hauptverfasser:	Uchida, Taro, Deguchi, Minoru, Asakura, Keisuke, Ozeki, Sumio, Iiyama, Taku
Format:	Artikel
Sprache:	eng ; jpn
Schlagworte:	Hydrophobicity Organic chemistry Paraffins Porosity Silicon dioxide Small angle X ray scattering Surface defects Water vapor
Online-Zugang:	Volltext
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Zusammenfassung:	A simple method for controlling the pore structure and properties of ordered mesoporous silica (OMS) by the physisorption of organic molecules is reported. The paraffin-modified OMSs were characterized by N2 gas and water vapor adsorption isotherms, small-angle X-ray scattering, and infrared spectroscopy. We found that paraffin first adsorbed on the pore surface defects, resulting in a smooth OMS pore surface; thus, the paraffin controlled the pore structure. In addition, the surface hydrophobicity increased with increasing paraffin filling fraction.
ISSN:	0366-7022 1348-0715
DOI:	10.1246/cl.170873