Morphology and surface heterogeneities in synthetic goethites
2003
Prelot, Benedicte | Villiéras, Frédéric | Pelletier, Manuel | Gérard, Gilles | Gaboriaud, Fabien | Ehrhardt, J.-J. | Perrone, J. | Fedoroff, M. | Jeanjean, J. | Lefèvre, Grégory | Mazérolles, Léo | Pastol, Jean Louis | Rouchaud, J.C. | Lindecker, C.
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Show more [+] Less [-]English. In the framework on a study of the acido-basic and sorption properties of iron oxides, a thorough characterization of two types of goethite powders was performed in several laboratories joined in a common project. Chemical analysis by ICPAES; high-resolution SEM, TEM, and AFM observations; XRD with line width analysis; and argon and nitrogen sorption isotherms were used for that purpose. The main crystallographic faces of goethite particles could be identified as {001}, {101}, and {121}, and their abundance correlated with the distribution of low-pressure argon adsorption local isotherms. These results will be very useful for further studies on the relationship between surface reactivity in aqueous solution and orientation of solid surfaces.
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