Synthesis Of Titanium Dioxide Photocatalyst Modified By WO₃

This paper mainly introduces the synthesis of mesoporous TiO2 photocatalyst with highcatalytic performance under sol-gel method,and on the basis of mesoporous photocatalyst on the two element composite photocatalyst WO3-TiO2 was prepaed.Then to choose a light catalyst characterization using X-ray diffraction analysis(XRD), ultraviolet diffuse(UV- vis- DRS), transmission electron microscope(TEM), energy spectrum(EDS), fluorescence spectroscopy(PL) technology, etc.The preparation of mesoporous TiO2, stearic acid as template. Using stearic acid as the templates of mesoporous TiO2,template optimal dosing quantity was 15%, the optimum calcination temperature is 450 ℃, optimal calcination time is 5 h.The preparation of TiO2 modified by WO3 and photocatalytic experiment. Variables for TiO2 doping amount, calcination time, calcination temperature, the dye pH, initial concentration of dye, dye dosing quantity. Synthesis of binary compound WO3- TiO2 photocatalyst, tungsten doping amount is 1.0%(mass ratio) calcination temperature is 400 ℃, the calcination time is 3 h binary compound WO3- TiO2 photocatalyst shows good the catalytic activity.The preparation of mesoporous TiO2 modified by WO3 and photocatalytic experiment. Variables for WO3 doping amount, calcination time, calcination temperature, the dye pH, initial concentration of dye, dye dosing quantity. Using WO3 modified mesoporous TiO2, preparation of the composite photocatalyst activity of methyl orange simulated wastewater are concluded: tungsten doping amount was 1.5%, the calcination temperature is 450 ℃, calcination time is 4 h, the catalytic activity was the highest.