Synthesis of nanocrystalline marcasite iron ditelluride FeTe2 in aqueous solution

Citation
Wx. Zhang et al., Synthesis of nanocrystalline marcasite iron ditelluride FeTe2 in aqueous solution, MAT SCI E B, 79(3), 2001, pp. 244-246
Citations number
13
Language
INGLESE
art.tipo
Letter
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
ISSN journal
0921-5107 → ACNP
Volume
79
Issue
3
Year of publication
2001
Pages
244 - 246
Database
ISI
SICI code
0921-5107(20010215)79:3<244:SONMID>2.0.ZU;2-J
Abstract
Reaction of an alkaline aqueous solution dissolving elemental tellurium and iron(II) complex Na-2[Fe(EDTA)] aqueous solution produces nanocrystalline marcasite FeTe2 at 140 degreesC under atmospheric pressure. All peaks in th e XRD pattern of the final product can be indexed to orthorhombic FeTe2 wit h the cell constants a = 5.31 Angstrom, b = 6.29 Angstrom and c = 3.86 Angs trom. TEM image of FeTe2 nanocrystallites shows an average particle size of 25 nm with a spherical morphology. The tellurium alkaline solution, as a t ellurium source, makes FeTe2 crystallize well in aqueous solution. The use of iron(II) complex instead of iron(II) ion greatly reduced the amount of b yproduct. The mechanism of the formation of iron ditelluride was discussed. (C) 2001 Elsevier Science B.V. All rights reserved.