TURKISH JOURNAL OF CHEMISTRY, cilt.29, sa.5, ss.487-495, 2005 (SCI-Expanded)
Our aim was to improve the relatively poor adsorption characteristics of natural pyrophyllite and those of TiOm and Ti(OR)(x)(OH)(y)(O)(z) obtained from titanium tetraisopropoxide (TTIP) by the sol-gel process. For this purpose, the surfaces of the above-mentioned adsorbents were coated with a surface modifier by dipping them in 1% and 50% (w/w) solutions of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (DIAMO) in methanol. Realization of the coating processes was checked by FT-IR and SEM analyses. FT-IR analyses of the coated powders heat treated at 110 degrees C showed that condensation took place between OH groups of prehydrolyzed silane molecules and-hydroxyl groups and/or oxygen atoms on the surface of the powders, ensuring the attachment of the silane molecules to the surface.