A 129Xe Nuclear Magnetic Resonance Study on Xenon Trapped in Fully Dehydrated Mesoporous Silica and Molecular Sieves 5A and 13X under Atmospheric Pressure

被引：1

作者：

Hattori, Mineyuki ^{[1
]}

Hata, Nobuhiro ^{[1
]}

Takada, Syozo ^{[1
]}

Yamamoto, Noritaka ^{[1
]}

Hiraga, Takashi ^{[1
]}

Hayamizu, Kikuko ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2009年 / 48卷 / 12期

关键词：

ADSORBED XENON; GENERAL CORRELATION; CHEMICAL-SHIFTS; PORE-SIZE; NMR; ZEOLITES; POROSITY; PROBE; FLOW; NAY;

D O I：

10.1143/JJAP.48.125001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Xe-129 nuclear magnetic resonance (NMR) spectra of naturally abundant xenon trapped in fully dehydrated mesoporous materials with pore diameters of 2 nm or less were observed under atmospheric pressure in the temperature range of 168-373 K. The diameters of the three porous materials considered in this study were about 0.5, 1, and 2 nm for the molecular sieves 5A and 13X and synthesized mesoporous silica, respectively. The samples were fully dehydrated using an ultrahigh-vacuum system, and xenon gas was introduced into a precooled sample at 168 K, slightly above its boiling point. The 129Xe NMR spectra were observed while increasing the temperature, and the Xe-129 shift, linewidth, and area intensity were observed at each temperature for the three samples under atmospheric pressure. The behaviors of xenon atoms in small pores observed in equilibrium states can provide important information on the relationship between the pore structure and the Xe-129 chemical shift, linewidth, and signal intensity. (C) 2009 The Japan Society of Applied Physics

引用

页数：6