Researches on photocatalytic activities and photovoltaic properties of TiO2 nanoparticles

We investigated the photovoltaic properties of series of TiO2 photocatalyst s by means of SPS and found that the thresholds of TiO2 particles blue shif t with their particle sizes decreasing and crystal phases changing from rut ile TiO2 to anatase TiO2. Combining with the photodegradation activities of TiO2 on C7H16, it was concluded that the photocatalytic activities of TiO2 increase with their thresholds increasing, which can be explained using en ergy band theory. We also investigated the relationship beween the photovol taic properties and photocatalytic activities of B TiO2 before and after ph otooxidation on C7H16, SO2 and C7H16+SO2, respectively and found adsorbates at the surface of TiO2 affect their photocatalytic activities and conducti on types of surface layer.