Abstract
1. Coordinationally unsaturated titanium ions and surface hydroxyl groups serve as centers for the chemisorption of carboxylic acids on rutile. Oxygen atoms and residual hydroxyl groups, both on the solid surface and in the surface bound acid molecules, serve as centers for physical adsorption on the acid modified rutile surface. 2. The carboxylic acids undergo both monodentate and bidentate chemisorption on the rutile surface, mono-dentate bonding being established either through the surface hydroxyl groups, or through the acid oxygen atoms and the surface titanium atoms. 3. Methanol and water molecules partially displace chemisorbed acetic acid from the surface, forming surface methoxyl and hydroxyl groups, the displacement being much more pronounced with methanol than with water. Neither methanol nor water are capable of displacing chemisorbed stearic acid from the rutile surface.
Published Version
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