Effect of reaction atmosphere on particle morphology of TiO 2 produced by thermal decomposition of titanium tetraisopropoxide

摘要: Thermal decomposition of titanium tetraisopropoxide (TTIP) was carried out in varying reaction atmospheres: nitrogen, oxygen, and nitrogen plus water vapor. The effect atmosphere on the morphology, size, crystalline structure produced TiO2 particles studied. reactor used similar to microreactor proposed earlier by Park et al. (2001, J. Nanopart. Res., 3, 309–319), but for a modification precursor evaporator. temperature varied from 300 700°C TTIP concentration evaporator 1.0 7.0 mol%, holding residence time at 0.7 s. primary-particle size range 25–250 nm, with operating condition. amorphous mixture rutile anatase vapor, oxygen atmospheres. In agglomerates composed very small whose individual boundaries are not clearly distinguished were produced. composing an agglomerate became larger spherical. As particle increased further. variation primary discussed comparison previous experimental data.