Research Progress of Modification Methods for TiO2-based Photocatalysts
TiO2 is widely used in environmental protection and photocatalytic degradation of pollutants due to its large surface area,stable chemical properties and high photocatalytic activity.However,due to its large band gap,it can only absorb ultraviolet light,its utilization rate of sunlight is greatly reduced.In addition,the high recombination rate of photogenerated electron-hole pairs thus limits its large-scale industrial application.Therefore,how to further improve the photocatalytic effect of TiO2 and the corresponding utilization rate of sunlight has attracted much attention from researchers.In this paper,the research progress of modification methods for TiO2-based semiconductor materials was reviewed,such as non-metallic element supporting,metal element supporting,semiconductor composite modification and dye sensitization modification.
TiO2 photocatalystMetal element modificationNonmetallic elements modificationSemiconductor composite modification
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