Preparation and Characterization of Sulfated TiO2/Zeolite Composite Catalysts with Enhanced Photocatalytic Activity
Abstract
Sulfated TiO2 nanoparticles 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 (SO2−4 ions, calcination temperature and loading amount of sulfated TiO2) on photocatalytic activity and crystallization of composite photocatalysts. The results indicated that the SO2−4 ions are successfully immobilized on the surface of TiO2, and sulfated TiO2/zeolite show the highest photocatalytic activity for methyl orange at the [SO2−4]/[Ti4+] molar rate of 1:1, calcination temperature of 600∘C for 2h, and sulfated TiO2 loading amount of 40%, respectively.
