INACCESSIBLE PORE CHARACTERIZATION OF LESS-CRYSTALLINE MICROPOROUS SOLIDS

被引：58

作者：

RUIKE, M ^{[1
]}

KASU, T ^{[1
]}

SETOYAMA, N ^{[1
]}

SUZUKI, T ^{[1
]}

KANEKO, K ^{[1
]}

机构：

[1] CHIBA UNIV,FAC SCI,DEPT CHEM,CHIBA 263,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 38期

关键词：

D O I：

10.1021/j100089a038

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 pore structures of microporous carbon fibers having less-crystalline structures with different activation extents were examined by small-angle X-ray scattering (SAXS), N-2 adsorption, and density measurements. The different kinds of porosities were associated with observable quantities and a new concept of an inaccessible pore was introduced. Inaccessible pores include closed pores and ultrapores which are accessible by He at 303 K but not by N-2 at 77 K. The surface area of samples was determined by both the high-resolution a(5) plot of the N-2 adsorption isotherm and the Debye-Bueche plot of the SAXS profile. The surface area a(x) from SAXS was greater than that a(s) from N-2 adsorption. The difference a(x) - a(s) was associated with the volume and size of the inaccessible pores. The possibility for a general application of this inaccessible pore characterization was discussed.

引用

页码：9594 / 9600

页数：7

共 29 条

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