BULK-LIKE SILOXANE LINKS ON SILICA SURFACE

被引：6

作者：

ELSHAFEI, GMS ^{[1
]}

MOKHTAR, M ^{[1
]}

机构：

[1] AL-AZHAR UNIV,FAC SCI,DEPT CHEM,CAIRO,EGYPT

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1995年 / 175卷 / 02期

关键词：

SILICA GEL; SILOXANE LINKS; DEHYDROXYLATION; DRIFTS;

D O I：

10.1006/jcis.1995.1484

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A progressive increase in the intensity of the SiOSi bending band at 470 cm(-1) in the DRIFT spectrum of silica gel is recorded upon heating in the temperature range 100-400 degrees C. This increase in intensity is attributed to surface siloxanes formed due to condensation of surface hydroxyls which were necessarily too near to each other, Since the newly formed siloxanes showed their bending mode at the same frequency as that of the siloxanes in the bulk, both types of siloxanes are considered similar. (C) 1995 Academic Press, Inc.

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页码：518 / 519

页数：2

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