SURFACE-STRUCTURE AND CHEMISTRY OF HIGH SURFACE-AREA SILICA-GELS

被引：94

作者：

BRINKER, CJ ^{[1
]}

BROW, RK ^{[1
]}

TALLANT, DR ^{[1
]}

KIRKPATRICK, RJ ^{[1
]}

机构：

[1] UNIV ILLINOIS,URBANA,IL 61801

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1990年 / 120卷 / 1-3期

关键词：

Silica Gel;

D O I：

10.1016/0022-3093(90)90187-Q

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Combined Raman and 29Si NMR investigations of high surface area silica gels indicate that dehydroxylation of the a-SiO2 surface results preferentially in the formation of cyclic trisiloxanes (3-membered rings). Estimates of the maximum experimentally observed concentration of 3-membered rings correspond to a surface coverage of about 28-58%. Two consequences of 3-membered rings on the a-SiO2 surface are enhanced hydrolysis rates and increased skeletal densities. © 1990.

引用

页码：26 / 33

页数：8

共 29 条

[1]

[Anonymous], 1979, CHEM SILICA

[2]

Balfe C. A., 1986, MATER RES STAND, V73, P619

[3]

Brinker C.J., 1984, BETTER CERAMICS CHEM, V32, P25

[4] CHEMICAL-REACTIVITY AND THE STRUCTURE OF GELS [J].