Surface areas of kaolin, α-Fe2O3 and hydroxy-Al montmorillonite

被引：18

作者：

Helmy, AK ^{[1
]}

Ferreiro, EA ^{[1
]}

de Bussetti, SG ^{[1
]}

Peinemann, N ^{[1
]}

机构：

[1] Univ Nacl Sur, RA-8000 Bahia Blanca, Argentina

来源：

COLLOID AND POLYMER SCIENCE | 1998年 / 276卷 / 06期

关键词：

evaluation of surface areas; kaolin; hematite; hydroxy-Al montmorillonite;

D O I：

10.1007/s003960050278

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：

Adsorption of eight organic molecules on kaolin, alpha-Fe2O3, and hydroxy-Al montmorillonite was studied to examine the effect of sorbate area on the values of the surface area of these materials. For each sorbent, the number of molecules at monolayer coverage per gram produced a single hyperbola when plotted as a function of the area occupied by an adsorbate. The equations of the hyperbolas are: NA = 22.23 A(0.098) for the kaolin\NA = 53.70 A(-0.399) for alpha-Fe2O3 and NA = 161.81 A(0.322) for the hydroxy-Al montmorillonite. These equations give accessible surface areas and not the true surface areas of the solids studied, which remain elusive.

引用

页码：539 / 543

页数：5

共 25 条

[1] ADSORPTION OF VAPORS BY SILICA GELS OF DIFFERENT STRUCTURES [J].