Synthesis and photocatalytic activity of TiO2 nanoparticles prepared by chemical vapor condensation method with different precursor concentration and residence time

► The specific surface area (92.5-163.5 m2 g-1) of the CVC-prepared TiO2 powders depends on the synthesis conditions. ► The photocatalytic activity of the prepared TiO2 samples is strongly dependent on the crystallinity and SSA. ► The photocatalytic activities are in the order of 7.0TiO20.7 > 7.4TiO20.3 > 7.2TiO20.5 > 6.8TiO20.9 > P25TiO2.