Artículos de revistas
Characterization of the colloidal products of pentacarbonyliron oxidation
Fecha
1987-03-16Registro en:
Colloids and Surfaces, v. 23, n. 1-2, p. 69-81, 1987.
0166-6622
10.1016/0166-6622(87)80250-0
2-s2.0-0023313413
7182671143702858
Autor
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Universidade Estadual de Campinas (UNICAMP)
Institución
Resumen
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.