Synthesis and structural investigations of tantalates phosphates in the flux system Na2O-P2O5-Ta2O5-MoO3

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464779

I. V. Odynets, O. M. Doroshenko, A. A. Babaryk, N. Slobodyanik, S. Khainakov, V. Baumer

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引用次数: 2

Abstract

The complex sodium-tantalum phosphates (Na2Ta6P4O26, Na3Ta7P4O29, Na4Ta8P4O32) have been synthesized using the flux method in the quasi-quaternary system Na2O-P2O5-Ta2O5-MoO3. These compounds are isostructural with family of sodium-niobium phosphates NaxNb2mP4O6m+8 and tightly related to monophosphate tungsten bronzes (MPTBp) with pentagonal-shaped tunnels. The structure of these phosphates has been investigated by X-ray powder and single crystal diffraction. Their three-dimensional frameworks consist of slabs of corner-shared TaO6 distorted octahedra connected via isolated PO4 tetrahedra and delimit pentagonal tunnels running along c, where Na atoms are located. The solid state band gap measurements gave reasonable prospects for its photocatalytic activity.

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Na2O-P2O5-Ta2O5-MoO3助熔剂体系中磷酸钽酸盐的合成及结构研究

采用助熔剂法在准季系Na2O-P2O5-Ta2O5-MoO3中合成了配合物Na2Ta6P4O26、Na3Ta7P4O29、Na4Ta8P4O32。这些化合物与钠铌磷酸盐家族NaxNb2mP4O6m+8具有相同的结构，并与具有五角形隧道的单磷酸钨青铜(MPTBp)密切相关。用x射线粉末衍射和单晶衍射研究了这些磷酸盐的结构。他们的三维框架由角共享的陶6扭曲八面体板组成，通过孤立的PO4四面体连接，并沿着c划定五边形隧道，Na原子位于其中。固体带隙测量结果对其光催化活性进行了合理的展望。

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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