ABSTRACT
This chapter is concerned with the degree of correlation attainable between parameters deduced from such adsorption studies and those deduced from measurements on relative efficiencies and solute concentration dependence of Titanium dioxide (TiO2)-sensitized Photocatalyzed Degradation (PCD) of the model pollutants. Particularly lacking were convincing interpretations of the roles of solute adsorption onto surfaces of semiconducting particles and of the influence of such adsorption upon rates/efficiency of PCD of the solute. As yet, definitive evidence is lacking for or against contributions to TiO2-sensitized photodegradations by such processes dependent upon surface mono-layer-solution multilayer relocations. However, the demonstrations given in the present work of inadequacies in unmodified Langmuir-Hinshelwood treatments indicate that such possibilities should no longer be ignored for poorly adsorbing pollutants. Insufficient consideration of the roles of solvent molecules at the microinterfaces since, in reality, polar solvent molecules are likely to compete strongly against solute species for adsorption sites.
