Characterization of the colloidal products of pentacarbonyliron oxidation
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1987-03-16
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Pentacarbonyliron was oxidized with H2O2, in organic solvents, to give colloidal sols. The aqueous-ethanolic sol is highly stable and undergoes thermally-reversible coagulation. Its solid phase was found to be a non-crystalline Fe (III) hydroxoacetate which is transformed to α-Fe2O3 when heated to 300°C. Iron-bound acetate groups are assumed to have a major role in the sol stability, by preserving the amorphous solid phase. Dry hydroxoacetate particles were heated under vacuum; scanning electron microscopy revealed that these particles coalesce and grow, as in a sintering process but at low temperatures (100-250°). © 1987.
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INORGANIC COMPOUNDS - Oxidation, SOLIDS - Microscopic Examination, SOLVENTS, HYDROXOACETATE PARTICLES, IRON HYDROUS OXIDE, PENTACARBONYLIRON OXIDATION, COLLOIDS
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Colloids and Surfaces, v. 23, n. 1-2, p. 69-81, 1987.