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Abstract:

The adherence of hematite (αFe2O3) particles onto mercury electrodes in water-ethanol mixtures has been studied by counting using optical microscope images. The number of attached particles, when the ethanol content is small, decreases as the ethanol concentration increases. At a mole fraction of ethanol near to 0.2, the number of particles goes through a minimum and then it increases with ethanol concentration. When the electrode potential is modified, curves of the number of particles vs. ethanol mole fraction with the same shape are found, but which cross each other. The dependence on the ethanol concentration can be explained based on the dependence of particle/solution and metal/solution interaction energies with the solvent composition.

Registro:

Documento: Artículo
Título:Deposition of colloidal hematite onto mercury from water-ethanol mixtures
Autor:Andrade, E.M.; Molina, F.V.; Posadas, D.
Filiación:INQUIMAE, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428, Buenos Aires, Argentina
Departamento de Química, Facultad de Ciencias Exactas, Inst. Invest. Fisicoquimicas T., Suc. 4, CC 16, 1900 La Plata, Argentina
Palabras clave:Hematite adhesion; Metal surface; Water-ethanol mixtures
Año:1997
Volumen:8
Número:4
Página de inicio:371
Página de fin:376
DOI: http://dx.doi.org/10.1590/S0103-50531997000400009
Título revista:Journal of the Brazilian Chemical Society
Título revista abreviado:J. Braz. Chem. Soc.
ISSN:01035053
CODEN:JOCSE
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_01035053_v8_n4_p371_Andrade.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01035053_v8_n4_p371_Andrade

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Citas:

---------- APA ----------
Andrade, E.M., Molina, F.V. & Posadas, D. (1997) . Deposition of colloidal hematite onto mercury from water-ethanol mixtures. Journal of the Brazilian Chemical Society, 8(4), 371-376.
http://dx.doi.org/10.1590/S0103-50531997000400009
---------- CHICAGO ----------
Andrade, E.M., Molina, F.V., Posadas, D. "Deposition of colloidal hematite onto mercury from water-ethanol mixtures" . Journal of the Brazilian Chemical Society 8, no. 4 (1997) : 371-376.
http://dx.doi.org/10.1590/S0103-50531997000400009
---------- MLA ----------
Andrade, E.M., Molina, F.V., Posadas, D. "Deposition of colloidal hematite onto mercury from water-ethanol mixtures" . Journal of the Brazilian Chemical Society, vol. 8, no. 4, 1997, pp. 371-376.
http://dx.doi.org/10.1590/S0103-50531997000400009
---------- VANCOUVER ----------
Andrade, E.M., Molina, F.V., Posadas, D. Deposition of colloidal hematite onto mercury from water-ethanol mixtures. J. Braz. Chem. Soc. 1997;8(4):371-376.
http://dx.doi.org/10.1590/S0103-50531997000400009