Abstract
The influence of phosphates on the surface characterization of TiO 2 Al 2O 3 mixed oxides was investigated using a variety of techniques, such as nitrogen adsorption, TEM, XRD, XPS, and FT-IR. The XRD and XPS results indicate that the addition of phosphates can increase the dispersion of titanium component on the surface of alumina. And smaller TiO 2 clusters can be observed by TEM. The FT-IR patterns show that the samples modified by the presence of phosphates possess more adsorption-active sites, and a larger monolayer dispersion capacity for TiO 2, which accounts for the increased dispersion of TiO 2 on the surface of the Al 2O 3.
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