Iron oxides-oxyhydroxides are abundant materials in nature, and play a relevant role in many scientific and technical applications, participating in a number of environmentally and industrially important processes.

There are 15 iron oxides, oxyhydroxides, and hydroxides known to date. They show a variety of physical and chemical properties depending on their chemical composition and crystal structure. Among the more important ones, we have magnetite (Fe3O4), goethite (FeOOH), and lepidocrocite (a-FeOOH).

Different iron oxides and iron oxyhydroxides thin films were obtained by potentiostatic electrodeposition on a titanium foil substrate, from an aqueous solution 0.01M. FeSO4(NH4)2SO4·6H2O + 0.04 M CH3COOK and pH 6.0. Changes in the deposition potential allow to obtain different crystalline pure phases of the iron oxide-oxyhydroxides as magnetite, goethite, and lepidocrocite thin films with different structural and morphological characteristics. The films were characterized by XPS, XRD, SEM and TEM.

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