Preparation and Characterization of Sulfated TiO2/Zeolite Composite Catalysts with Enhanced Photocatalytic Activity

Abstract

Sulfated TiO2nanoparticles were successfully immobilized on zeolite through improving hydrolysis-deposition method. Microstructure, crystallization, surface state and surface area of composite catalysts were characterized by SEM, XRD, FTIR spectra, XPS and BET and the photocatalytic activity was evaluated by degradation of methyl orange under UV irradiation. We optimized these factors (SO[Formula: see text] ions, calcination temperature and loading amount of sulfated TiO[Formula: see text] on photocatalytic activity and crystallization of composite photocatalysts. The results indicated that the SO[Formula: see text] ions are successfully immobilized on the surface of TiO2, and sulfated TiO2/zeolite show the highest photocatalytic activity for methyl orange at the [SO[Formula: see text]]/[Ti[Formula: see text]] molar rate of 1:1, calcination temperature of 600[Formula: see text]C for 2[Formula: see text]h, and sulfated TiO2loading amount of 40%, respectively.