Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1490952 | Materials Research Bulletin | 2010 | 6 Pages |
Abstract
The replacement of tantalum by the couple Zr/W within the RTa–O–N systems (R = Y, Nd, Sm, Gd, Yb), enables the preparation of novel oxide and oxynitride phases in the R–Zr–W–O–N system. R2Zr2−xWxO7+x oxides exhibit the fluorite-type (x < 0.9) and scheelite (x ∼ 1) structures. Corresponding oxynitride compositions are of the fluorite-type and show different colors, for example in the case of ytterbium: pale yellow (x = 0.2 or 0.25), green (x = 0.5–0.8) and brown for the tungsten-rich samples (x = 0.9, 1). Photocatalytic activity measurements have been performed to investigate the overall water splitting behavior of these colored phases.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Franck Tessier, Pascal Maillard, Emmanuelle Orhan, François Cheviré,