V2.38Nb10.7O32.7: A V2O5-Nb2O5 mixed oxide tunnel structure related to the tetragonal tungsten bronzes

被引：11

作者：

Boerrnert, Carina ^{[2
]}

Carrillo-Cabrera, Wilder ^{[2
]}

Simon, Paul ^{[2
]}

Langbein, Hubert ^{[1
]}

机构：

[1] Tech Univ Dresden, Fachrichtung Chem & Lebensmittelchem, D-01069 Dresden, Germany

[2] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 05期

关键词：

Chemical synthesis; Transmission electron microscopy; Nanostructures; Structural elucidation; Tetragonal tungsten bronze; V2.38Nb10.7O32.7; PHASE-FORMATION; SOLID-STATE; DECOMPOSITION; PERFORMANCE; PRECURSORS; T-NB2O5; SYSTEM; GELS;

D O I：

10.1016/j.jssc.2010.02.018

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A crystal structural model for the orthorhombic compound V2.38Nb10.7O32.7, which is known as "V2Nb9O27.5", was developed by means of selected area electron diffraction (SAED), Rietveld refinement and high resolution electron microscopy (HREM). The metastable compound is obtained by thermal decomposition of freeze-dried precursors as chain-like agglomerated nanoparticles or by reaction of V2O5 with fresh-precipitated Nb2O5 as more compact micro-scaled crystals. With the latter, it was possible to identify its structure for the first time (space group Cmmm). The tetragonal tungsten bronze (TTB)-type structure shows high potential for ionic intercalation, since easily reducible [V(5+)2O(2-)] units are implemented in the tunnels of a rigid niobium oxide framework. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：1038 / 1045

页数：8

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