Study of preparation and properties of photocatalyst for hydrogen production from water splitting

摘要

The photocatalyst Fe doped K_2La_2Ti_3O_(10) for hydrogen production was prepared by three methods such as sol-gel, hydrothermal and solid solution. The effects of preparation method, doped element, sacrificial agent on photocatalytic activity were studied, the properties of samples were characterized with X-ray diffraction(XRD) and UV-Vis diffuse reflectance spectra(DRS). The photocatalytic activity evaluation measurements showed that the photocatalyst prepared by sol-gel has the highest catalytic activity, and methanol was the best sacrifice agent for hydrogen production from water splitting. UV-Vis DRS results indicated that the doping of Fe could expand the absorbing range to visible light. XRD results showed that the doping of Fe hadn't change the main construction of catalysts.