Titania (TiO2) aerogels were prepared by the sol-gel method using titanium(IV) chloride (TiCl4) and subsequent supercritical fluid drying (SCD) to avoid collapse of the original gel structure. The characteristics of titania aerogels with varying epoxide/TiCl4 ratios and amounts of water were analyzed using a BET surface analyzer, XRD, and FT-IR spectroscopy. VOCs, such as benzene, toluene, and m-xylene (BTX), were oxidized using the prepared titania aerogel; its performance was compared with that of commercially available TiO2 (P-25, Degusa). The surface area, pore volume, and average pore diameter of the titania aerogel formed using 1,2-epoxybutane as a epoxide were significantly smaller than those obtained using propylene oxide. The titania aerogels with 6 mol of epoxides had high surface areas, pore volumes, and average pore diameters. As a result of photo-oxidation, the conversion of benzene reached ca. 70 %; for the other reactants it reached ca. 60 %. The conversion of BTX increased as the inlet concentration decreased. The reactivity of titania calcined at 600 ℃ was greater than those of the sample calcined at 400 and 800 ℃. Water is required as a reactant for the oxidation of VOCs; the continuous consumption of hydroxyl radicals required replenishment to maintain catalyst activity. The activity ratio increased with the reaction time when enough water was present in the reactor.