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The heterocoagulation between colloidal particles and charged surfaces: The behavior of a gold sol in presence of a polarized mercury electrode

par Caselli, Maurizio;Lippolis, G.;Gierst, Lucien
Référence Journal of electroanalytical chemistry, 38, 2, page (451-463)
Publication Publié, 1972-08

Article révisé par les pairs

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Résumé :

The rate of amalgamation of a gold sol at a polarized mercury pool has been measured by following the decrease in optical absorption of the suspension with time. This method has been used to explore the nature and the influence of the following factors: presence of dissolved oxygen rate of stirring, size of colloidal particles, ionic strength, potential applied to the mercury and the effect of a surface active anion. For imposed potentials not too far from the point of zero charge, the rate constant of the heterocoagulation process can be calculated by taking into account the kinetics of transfer toward the surface. The effect of various factors is elucidated and discussed by adapting to the system, theories formulated for other processes involving bulk coagulation. © 1972.