e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
ISSN-L : 1348-0391
Regular Papers
Preparation of the NaTaO3 Crystal from the KTaO3 Substrate via Topotactic Alkaline Cation Substitution as Confirmed by Transmission Electron Microscopy
Mitsunori KittaHiroshi Onishi
Author information
Supplementary material

2020 Volume 18 Pages 32-37


Orthorhombic-type sodium tantalite (NaTaO3) is one of the most promising photocatalyst for hydrogen generation via water splitting reaction with ultraviolet-irradiation. In this research, we prepared NaTaO3 crystal from KTaO3 substrate via solid-state K+−Na+ alkaline cation substitution. In the transmission electron microscopy (TEM) observation revealed the perovskite-type KTaO3 crystal phase is transformed into the orthorhombic crystal phase via simple heating of KTaO3 substrate with Na2O2. Atomic scale scanning TEM imaging with energy dispersive X-ray spectroscopy (EDS) are supported that this phase transformation clearly based on the topotactic alkaline cation substitution with K+ and Na+ at a common Ta-O basic lattice structure.

Fullsize Image
Information related to the author

This article is licensed under a Creative Commons [Attribution 4.0 International] license.
Previous article Next article