Chromium (VI) reduction in the nano- or micron-sized iron oxide – Citric acid systems: Kinetics and mechanisms

“Self arranged Cactis” as new goethite morphology from the natural corrosion process of SAE 1020 carbon steel

“…The understanding and characterization of metallic oxides resulting from the aging process of iron alloys has undeniable importance for several areas of knowledge, with emphasis on physics, chemistry and materials science, its multidimensional structures are fundamental to correlate with its applications and diagnosis of pathologies [1, 2, 3]. In this way, the iron metal oxides have potential applications in the areas of catalysis [4], metallurgy [5], adsorption [6] and still important in the understanding of the degradation process of iron-based cultural art works [7]. In this sense, the morphological study of the nano and micro materials formed by these oxides, which may present in the Magnetite (Fe 3 O 4 ), Maghemita (γ-Fe 2 O 3 ), Haematite (α-Fe 2 O 3 ) and Goethite (α-FeOOH) as the spectroscopic analyzes are fundamental for their correct characterizations and applications.…”