Solid-State NMR Study of Dehydration of Layered α-Niobium Phosphate

被引：15

作者：

Zhu, Jianfeng ^{[1
]}

Huang, Yining ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada

来源：

INORGANIC CHEMISTRY | 2009年 / 48卷 / 21期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

ELECTRIC-FIELD GRADIENT; CHEMICAL-SHIFT TENSORS; AB-INITIO; CRYSTAL-STRUCTURE; SPECTROSCOPY; NB-93; INTERCALATION; ADSORPTION; OXIDE; V-51;

D O I：

10.1021/ic9011668

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The dehydration of a representative layered alpha-niobium phosphate (alpha-NbP) was studied by Nb-93 solid state wide-line NMR in combination with several other techniques including X-ray diffraction, thermogravimetric analysis, and P-31 MAS NMR. Four niobium phosphate species associated With dehydration including tri-, di-, and monohydrate phases, as well as a completely dehydrated phase, are identified by Nb-93 NMR. The tri- and dihydrate phases coexist in the as-made alpha-NbP sample. The monohydrate phase formed after heating the sample at 70 degrees C, and an additional anhydrous phase was produced when further dehydrated at 140 degrees C. The dehydration at 250 degrees C resulted in a completely anhydrous phase. The Nb-93 NMR parameters extracted from the wide-line NMR spectra acquired at different magnetic fields are highly sensitive to the dehydration process.

引用

页码：10186 / 10192

页数：7

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