PREPARATION AND PERFORMANCE OF COMPOSITE PHOTOCATALYST WITH TiO2-CeO2 SUPPORTED ON ACTIVATION AND MODIFIER FLY ASH

In this work, the fly ash (FA) carrier surface was activated and modified by sulfuric acid and tetrabutyl titanate sol, the CeO2-TO2/FA composite photocatalyst were prepared by a simple wet-chemical method. The phase, composition and surface microstructure were investigated by X-ray diffraction(XRD), Scanning electron microscopy(SEM), the BET surface area (BET) and Energy Dispersive Spectrometer(EDS). The photocatalytic activity of composite photocatalyst were investigated by using the methyl orange dye as the degradation object. The results showed that the activated FA increased specific surface area by soaking H2SO4 and the modified FA was more beneficial to loading photocatalysts via tetrabutyl titanate sol processing. The as-prepared CeO2-TO2/FA composite photocatalyst showed the higher photocatalytic degradation efficiency under UV irradiation, the composite photocatalyst decolorization efficiency with weight 3% loading amount (CeO2:TiO2=1) can reach about 90% after 90 min, meanwhile, the mechanism of action and carrier effect were discussed.