Modification And Photolysis Of Water Hydrogen Production Performance Of TiO₂ Semiconductor Material

Environmental pollution and energy shortage are two of the focal point of the current social attention, the use of solar energy and other clean energy can effectively solve these problems. In recent years, research of the photocatalytic technology becomes more and more concerned, which is the key to the preparation of hydrogen energy.TiO2, a kind of typical semiconductor with relatively bulk band gap（3.2 eV） are being paid more and more attention for low price and stable property.Disadvantageously, owing to its wide band gap, only absorbs UV light in the solar spectrum, which restricts its application in photocatalysis. To solve these problems, on the one hand, the increase the range of light is necessary. On the other hand, different cocatalysts lengthen life of electron-hole pairs. Based on the above analysis, in this paper, we modified TiO₂ by doping, loading and prepared the superior photocatalysts under UV and solar light irradiation. The major aspects are as follows:Zn²⁺ doped TiO₂ samples was prepared by sol-gel method and characterized to mainly know structure and morphology. The content of different Zn²⁺effect on hydrogen production of Zn²⁺-TiO₂ was examined under the artificial sunlight. The results show that 1 wt% Zn²⁺-TiO₂ composite showed the highest photocatalytic activity with the amounts of 180 μmol·h-1in hydrogen production.CuS-NiS-P25 samples were synthesized by hydrothermal method and tested to know structure, morphology and photocatalytic performance. The results show that 5wt% CuS-5 wt% NiS-P25 has good light stability and highest photocatalytic activity with the amounts of 800 μmol·h-1 in hydrogen production.TiO₂ nanotube（nanowire） catalyst was prepared through hydrothermal method.Also examined the effect on structure and properties of catalyst after the loading the different non-noble metal sulfide cocatalysts.