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.