Enhanced photocatalytic activity of Ce??-TiO?for 2-mercaptobenzothiazole degradation in aqueous suspension for odour control

Abstract

A series of cerium ion-doped titanium dioxide (Ce??-TiO?) catalysts with special 4 ? electron configuration was prepared by a sol¡Vgel process and characterized by Brunauer-Emmett-Teller method, X-ray diffraction, X-ray photoelectron spectroscopy (XPS), UV¡Vvis diffuse reflectance spectroscopy (DRS), and also photoluminescence (PL) emission spectroscopy. The photocatalytic activity of Ce??-TiO?catalysts was evaluated in the 2-mercaptobenzothiazole (MBT) degradation in aqueous suspension under UV or visible light illumination. The experimental results demonstrated that the overall photocatalytic activity of Ce??-TiO?catalysts in MBT degradation was signigicantly enhanced due to higher adsorption capacity and better separation of electron-hole pairs. The experimental results verified that both the adsorption equilibrium constant (K?) and the saturated adsorption amount (?[sub max