화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.30, No.7, 895-900, 2007
Photocatalytic oxidation of isopropanol in aqueous solution using perovskite-structured La2Ti2O7
This study is focused on the application of a highly-doped layered perovskite, La2Ti2O7, as the photocatalyst for the photocatalytic decomposition of isopropanol (IPA). The La2Ti2O7 powder prepared by solid state reaction was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis diffuse reflectance spectrophotometry (UV-DRS), X-ray photoelectron spectroscopy (XPS), and zeta potential. The temporal behavior of the photocatalytic decomposition of IPA in aqueous solution by the UV/La2Ti2O7, with a photoreactor operated in a recirculation mode, was studied under various conditions including solution pH, light intensity, and La2Ti2O7 loading. The decomposition of IPA in aqueous solution by La2Ti2O7 photocatalytic processes was found to be technically feasible. A kinetic equation was developed for modeling the photocatalytic decomposition of IPA by the UV/La2Ti2O7 photocatalytic processes.