Influential Factors of La-doped Calcium Titanate for Photocatalytic H-2 Evolution Under Visible Light

For photocatalytic H-2 evolution from water splitting, perovskite photocatalyst Ca0.99La0.01TiO3 was prepared by sol-gel method with citric acid as complexing agent. The influence of N doping on photocatalytic activity was investigated. The hydrogen-producing capacity of Ca0.99La0.01TiO3-xNx with different Pt loading and different kinds of sacrificial agents was also investigated under visible light irradiation. The photocatalytic materials were characterized by X-ray diffraction ( XRD ) , scanning electron microscopy (SEM) , UV-Vis diffuse reflectance spectroscopy ( UV-Vis DRS) . The results show that under the irradiation of visible light, the perovskite photocatalyst Pt-Ca0.99La0.01TiO3-xNx with 1% Pt-loading has the highest photocatalytic activity of hydrogen production from water when Na2SO3/Na2S is used as the sacrificial agent. Pt-loading promotes photocatalytic reaction and improves photocatalytic activity.