Mô hình thực nghiệm phản ứng bề mặt trong thiết bị Aerosol của quá trình tổng hợp vật liệu nano tinh thể TiO2

Abstract

Nanometer-sized titania particles were prepared by low thermal of  vapor hydrolysis process titanium tetrachloride (TiCl₄) in a furnace type aerosol reactor. Reaction model was introduced because simple reaction coagulation (SRC) model, which is valid at high conversion, was found to be improper at high concentration and low conversion. The size of titania particles increased from 10 to 50 nm with increasing input concentration of TiCl₄ from 3.06×10^-7 to 1.59×10^-6 mol/ml and the residence times from 7 s to 35 s at 250 ^oC. The reaction model predicted the decreasing trend of the particle size with increasing temperature, whereas the SRC model simulation predicted that the size was an increasing function of the temperature.

Keywords: Nano TiO₂, aerosol reactor, vapor hydrolysis.