Abstract
The reactivity of spinel iron oxide colloids towards adsorption has been investigated by protometry, electron microscopy, X-ray diffraction and Mössbauer spectroscopy. The conversion Fe3O4-γFe2O3 can occur in various aqueous anaerobic media. It is ruled by electron transfers through the interface draining out the mobile electrons of the core, with correlative iron diffusion. Interfacial electron transfers can proceed in either way, making the reaction somewhat reversible.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. G. Rethwisch and J. A. Dumesic, Appl. Catal. 21 (1986) 97.
H. Topsøe, J. A. Dumesic and M. Boudart, J. Physique 35 (1974) C6–411.
P. S. Sidhu, R. J. Gilkes and A. M. Posner, J. Inorg. Nucl. Chem. 39 (1977) 1953.
K. Haneda and A. H. Morrish, J. Physique 38 (1977) C1–321.
E. Tronc, J. P. Jolivet and R. Massart, Mat. Res. Bull. 17 (1982) 1365.
J. P. Jolivet and E. Tronc, J. Colloid Interface Sci. (in the press).
E. Tronc, J. P. Jolivet, J. Lefebvre and R. Massart, J. Chem. Soc. Faraday Trans. I, 80 (1984) 2619.
S. Mørup, J. A. Dumesic and H. Topsøe in Applications of Mössbauer spectroscopy, ed. R. L. Cohen, Vol 2 (Academic Press, New York, 1981), p. 1.
E. Tronc and D. Bonnin, J. Physique Lett. 46 (1985) L437.
C. Gleitzer and J. B. Goodenough in Structure and Bonding, Vol 61 (Springer-Verlag, Berlin, 1985) p. 1.
L. David and A. J. E. Welch, Trans. Farad. Soc. 52 (1952) 1642.
E. Tronc and J. P. Jolivet, J. Physique (to be published).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Tronc, E., Jolivet, J.P., Belleville, P. et al. Redox phenomena in spinel iron oxide colloids induced by adsorption. Hyperfine Interact 46, 635–643 (1989). https://doi.org/10.1007/BF02398253
Issue Date:
DOI: https://doi.org/10.1007/BF02398253