As a kind of classic perovskite type oxide, BiFeO₃ possesses a certain visible light catalytic and heterogeneous Fenton-like catalytic performance. Under the irradiation of visible light and in the presence of hydrogen peroxide, BiFeO₃ could activate H₂O₂ and generate abundant strong oxidizing species, which attack the molecules of pollutants, therefore inducing the degradation of them. However, the problems of low quantum efficiency and easy recombination between photogenerated electrons and holes during the visible light catalytic process of BiFeO₃ still exist. It could hardly degrade the stable organic pollutants effectively under the irradiation of visible light. Except that, its ability of activating H₂O₂ still needs enhancing. The research progress of BiFeO₃ and its modifier which are used as a kind of visible light and heterogeneous Fenton-like catalyst in almost two decades is summarized in this paper. And the methods and effects to improve the environmental catalytic performance of BiFeO₃ (such as morphology control in preparation, noble metal deposition, ion doping, semiconductor recombination and load on the surface of other materials) are introduced emphatically. Through the modification, it was found that the visible light catalytic performance and heterogeneous Fenton-like catalytic ability of BiFeO₃ are strengthened. And a large number of pollutants could be degraded effectively by BiFeO₃ and its modifiers. At last, the research direction of BiFeO₃ compound catalyst in future is prospected.
Contents
1 Introduction
2 Fenton-like catalytic ability of BiFeO₃
3 Fenton-like catalytic ability of BiFeO₃ modifiers
4 Visible light catalytic ability of BiFeO₃ and its modifiers
4.1 Visible light catalytic ability of BiFeO₃
4.2 Visible light catalytic ability of BiFeO₃ modifiers
5 Visible light and Fenton-like catalytic performance of BiFeO₃ and its modifiers
5.1 Visible light and Fenton-like catalytic performance of BiFeO₃
5.2 Visible light and Fenton-like catalytic performance of BiFeO₃ modifiers
6 Conclusion and outlook