Neutron scattering study of adsorption in porous MCM-41 silica

被引：2

作者：

Brown, R. J. C. ^{[2
]}

Evans, M. J. B. ^{[3
]}

Tun, Z. ^{[1
]}

机构：

[1] Natl Res Council Canada, Canadian Neutron Beam Ctr, Chalk River, ON K0J 1J0, Canada

[2] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada

[3] Royal Mil Coll Canada, Dept Chem & Chem Engn, Kingston, ON K7K 7B4, Canada

来源：

CANADIAN JOURNAL OF PHYSICS | 2010年 / 88卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

CAPILLARY CONDENSATION; NITROGEN ADSORPTION; MOLECULAR-SIEVES; SORPTION; SANS; DIFFRACTION; ISOTHERMS; WATER; MODEL;

D O I：

10.1139/P09-086

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Adsorption of n-pentane on MCM-41 silica has been studied by neutron scattering on both the adsorption and desorption isotherms. Adsorption takes place without hysteresis in either the isotherm or the neutron scattering profile. Adsorption of contrast-matched pentane in porous MCM-41 silica at first increases the intensity of the (10) Bragg peak but reduces the (11) and (20) peaks, and as the pores are filled the intensities of all Bragg peaks are reduced to zero. The SANS background has a 1/Q dependence, typical of a material prepared with templates of one-dimensional character (cylinders). The initial increase of (10) intensity allows estimation of the cylindrical pore diameter to be 37 angstrom based on the variation of form factor as a function of the cylinder radius.

引用

页码：707 / 713

页数：7

共 20 条

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