93Nb MAS NMR of niobium containing silicotitanate exchange materials

被引：0

作者：

Cherry, BR ^{[1
]}

Nyman, M ^{[1
]}

Alam, TM ^{[1
]}

机构：

[1] Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA

来源：

ENVIRONMENTAL ISSUES AND WASTE MANAGEMENT TECHNOLOGIES IN THE CERAMIC AND NUCLEAR INDUSTRIES VIII | 2003年 / 143卷

关键词：

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Crystalline silicotitanate (CST), HNa3Ti4Si2O14.4H(2)O, is a highly selective Cs ion exchanger, making it an attractive material for removal of (CS)-C-137 from nuclear waste solutions. The Cs selectivity can be improved further by replacing a fraction of the framework titanium with niobium to form Nb-CST. High-speed Nb-93 magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy was utilized to characterize framework changes as a function of Cs loading in a series of Nb-CST materials. Based on these 93 Nb MAS NMR studies it is argued that the niobium octahedra present in Nb-CST have near uniform Nb-O bond lengths and are slightly distorted from cubic symmetry.

引用

页码：377 / 384

页数：8

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