Preparation and properties of monodispersed colloidal metal hydrous oxides

Abstract

The methods for preparation of colloidal dispersions consisting of exceedingly uniform particles of hydrous oxides of a number of metals are described. Some of the sols contain spherical amorphous particles, while others are well crystallized submicronic or micronic solids of different morphologies. These novel systems have been used to establish the chemical mechanisms of metal (hydrous) oxides formation and growth. Various properties of such uniform particles (surface charge, magnetism, color, etc.) are illustrated, and their use in the studies of interactions with different solutes (adsorption), with other particulate matter (heterocoagulation), and with surfaces of different materials (adhesion) are discussed. © IUPAC