Titanium dioxide–electrolyte interface. Part 1.—Gas adsorption and tritium exchange studies

Abstract

In order to facilitate analysis of potentiometric titration data on colloidal TiO₂ dispersions, a detailed gas adsorption and tritium exchange study of the TiO₂ colloidal material has been undertaken. Gas adsorption data revealed no significant porosity. The weight loss and tritium exchange yield the number of surface protons as 12.5 nm^–2, which is consistent with the crystal being made up of exposed crystal planes. This concordance substantiates the essential non-porosity and absence of a gel layer at the TiO₂–water interface.