Photocatalytic technology has the advantages of being green,clean and environment-friendly,and is widely used to degrade organic pollutants in water.Among them,TiO2 material is considered to be a promising photocatalyst because of its unique advantages.However,it has some drawbacks,such as wide band gap energy,insufficient visible light response and high recombination probability of carriers,which lead to the limitation of photocatalytic activity.To solve the above problems,the combination of TiO2 and heterojunction has aroused the interest of researchers.In addition,the unconventional TiO2-based heterojunction prepared by certain modification means has high photocatalytic degradation ability.However,these new photocatalysts still have great challenges in practical application,such as high cost,poor stability and high toxicity risk of by-products.Based on this,this paper made a systematic and comprehensive review of the existing research on TiO2-based heterojunctions in order to provide a certain theoretical support for the future research.
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基金资助
国家自然科学基金(52100104和52170053)
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