n-Heptane adsorption and desorption on porous silica observed by positron annihilation lifetime spectroscopy

被引：21
|
作者：
Zaleski, Radoslaw [1 ]
Dolecki, Waldemar [1 ]
Kierys, Agnieszka [2 ]
Goworek, Jacek [2 ]
机构：
[1] Marie Curie Sklodowska Univ, Inst Phys, Dept Nucl Methods, PL-20031 Lublin, Poland
[2] Marie Curie Sklodowska Univ, Fac Chem, Dept Adsorpt, PL-20031 Lublin, Poland
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2012年 / 154卷
关键词：
Adsorption; n-Heptane; Silica gel; Positron annihilation; DENSITY-FUNCTIONAL THEORY; CANONICAL MONTE-CARLO; CAPILLARY CONDENSATION; NITROGEN ADSORPTION; MESOPOROUS SILICA; PORE MORPHOLOGY; MCM-41; SANS; NANOPORES; SPECTRA;
D O I：
10.1016/j.micromeso.2011.08.032
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Many papers are devoted to interpretation of adsorption of gases on solids. A complete understanding of the mechanism of pore filling and emptying by adsorbate molecules is a fundamental meaning for obtaining the accurate parameters characterizing the pore structure. The present article deals with application of positron annihilation lifetime spectroscopy (PALS) for determination of free volumes dimensions in pores upon adsorption process. On the basis of PALS spectra a comprehensive insight into adsorption mechanism of n-heptane in silica gel is presented. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：142 / 147
页数：6
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