Synthesis and characterization of catalytic titanias via hydrolysis of titanium (IV) isopropoxide

Transmission electron microscopy (TEM) studies and nitrogen gas adsorption data were used to investigate textural characteristics of titanias prepared via calcination, at 400 degrees C/3 h, of the hydrolysis products of titanium(IV) isopropoxide in n-heptane or isopropanol solvent. A variety of titanias (anatase form) were produced with different textural characteristics. The nature of these products was controlled largely by the synthesis parameters such as water ratio, the addition of acetic acid, and the solvent used during the hydrolysis. The resultant microstructure of the solids is correlated with the pertinent preparative conditions. (C) 1998 Elsevier Science B.V.