Electronic state of iron in layered nanocomposite compound of molybdenum disulfide and iron hydroxide, as probed by Mossbauer spectroscopy

Authors
Afanasov, MI Danot, M Fabrichnyi, PB Golub', AS Lenenko, ND Novikov, YN Pokholok, KV Presnyakov, IA
Citation
Mi. Afanasov et al., Electronic state of iron in layered nanocomposite compound of molybdenum disulfide and iron hydroxide, as probed by Mossbauer spectroscopy, RUSS J IN C, 45(5), 2000, pp. 771-774
Citations number
7
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
ISSN journal
00360236 → ACNP
Volume
45
Issue
5
Year of publication
2000
Pages
771 - 774
Database
ISI
SICI code
0036-0236(200005)45:5<771:ESOIIL>2.0.ZU;2-Z
Abstract
The Fe-57 Mossbauer spectra of a nanocomposite based on molybdenum disulfid e containing iron atoms in two valence states-Fe(II) and Fe(III), Fe(II)/Fe (III) = 1.9-are studied. The variation in their spectral contributions in t he temperature range 60 less than or equal to T less than or equal to 160 K obeys the Debye model and corresponds to the following effective lattice t emperatures: Theta(M) = 275 K for Fe(II) ions and Theta(M) = 320 K for Fe(I II) ions. Beginning with T = 180 K, a new iron state emerges, which can be explained by the occurrence of rapid electron exchange involving a fraction of heterovalent cations.