Simultaneous measurement of infrared spectra and adsorption isotherms for the adsorption of phenol on silica at the solid/liquid interface
Abstract
An infrared cell is described with which spectra of species adsorbed at the solid/liquid interface and the corresponding adsorption isotherms can be determined simultaneously. The system has been tested by a study of the adsorption of phenol onto silica immersed in carbon tetrachloride. Isolated hydroxyl groups on the oxide surface form hydrogen bonds with adsorbed phenol molecules. The combined adsorption isotherm and spectroscopic results have enabled an estimate to be made of the population of isolated hydroxyl groups on the sample of silica studied.
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