Fractality of porous silicas: A comparison of adsorption and porosimetry data

被引：33

作者：

Fadeev, AY

Borisova, OR

Lisichkin, GV

机构：

[1] Laboratory of Organic Catalysis, Department of Chemistry, Moscow State University, Vorob. G., 119899, Moscow

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1996年 / 183卷 / 01期

关键词：

surface fractals; porous silica; silane chemisorption; porosimetry;

D O I：

10.1006/jcis.1996.0511

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：

The fractal dimensions of seven porous silicas were determined by means of gas adsorption, chemisorption of chlorosilanes, and mercury porosimetry. The silicas under investigation are shown to be surface fractals in the range of cross-sectional areas from 0.162 (N-2) to 1,450 sq. mn ((C6H13)(3)SiCl). The surface fractal dimensions obtained range from 2.05 to 2.90. On the other hand, mercury porosimetry data show that the silicas studied can be hardly considered as pore fractals within the range of a pore radius from 3.5 to 1000 nm. The apparent contradiction is discussed in the text. (C) 1996 Academic Press, Inc.

引用

页码：1 / 5

页数：5

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