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Laponite immobilized titania catalysts were prepared by a pillaring process and by hydrothermal synthesis (HT) applying different titania sources such as TiCl4 and TiOSO4.Textural investigations (XRD, TEM, N2 physisorption) evidenced that by the pillaring procedure a high specific surface area (~450 m 2 /g) mesoporous composite with 5-6 nm sized anatase nanoparticles were formed retaining the morphology of parent laponite structure. In probably due to the bigger titania particles and the more opened mesoporous structure of titania/laponite HT, and moreover to the peculiar surface acidic properties of sulfated titania species. Separation of catalysts from reaction media even in tap water was much easier than that of commercial titania, i.e. by self-settling.

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