Calorimetric Study of the Acidity and Interface Effects of Tin Dioxide Layers Deposited on Another Metal Oxide

Samples with various amounts of tin oxide were prepared by impregnating γ-Al₂O₃, TiO₂(anatase), SiO₂, ZrO₂ and MgO with tin tetrachloride or tributyltin acetate solutions. After drying and calcination, the samples were characterized by chemical analysis, XRD and BET measurements. Ammonia adsorption microcalorimetry was used in order to determine the number, strength and strength distribution of surface acid sites. The influence of the adsorption temperature, evacuation temperature, amount of SnO₂ deposited and of the nature of the support on the adsorption properties were studied. This revised version was published online in July 2006 with corrections to the Cover Date.