Study of Preparation and Photocatalytic Activity of PbS/K_2La_2Ti_3O_(10)

A series of PbS/K2 La2 Ti3 O10 composite photocatalysts with different PbS content were prepared via a facile precipitation method.The prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray fluorescence spectrometer(XRF),ultraviolet-visible diffuse reflection(UV-Vis),X-ray photoelectron spectroscopy(XPS)and photoluminescence measurement(PL).The photocatalytic activities of the catalysts were evaluated by photocatalytic degradation of Rhodamin B under visible light irradiation.The effect of PbS content and dosage of catalyst for photocatalytic degradation Rhodamin B were also investigated.The results revealed that the PbS/K2 La2 Ti3 O10 composites greatly improved the photocatalyst activity under visible light.The photocatalytic activity of degradation of Rhodamin B for 0.35g(25wt%)PbS/K2 La2 Ti3 O10 composite photocatalyst was 71.4% under visible light irradiation for 2h.