ZnTiO3的制备及光催化性能研究

ZnTiO3 powders with pure hexagonal phase were synthesized by the sol-gel process using tetrabutyl titanate and zinc acetate as raw material. The composites were characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD) patterns, scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectra (XPS). The relationship between the physicochemical property and photocatalytic activity was investigated, too. It is found that the photocatalytic activity is dependent on the phase of ZnTiO3. The product of ZnTiO3 with pure hexagonal-phase calcined at 800℃ for 2h exhibits the maximum photocatalytic activity in the photochemical degradation of humic acid under solar light irradiation. The processing parameters such as the dosage of catalysts and the light source also play an important role in tuning the photocatalytic activity. Under solar light irradiation, the humic acid of photocatalytic degradation was 100% after photocatalytic reaction continued for 1.5h with the dosage of photocatalysts was 0.8g/L.