【摘要】 铁酸铋（BiFeO₃）是一种典型的钙钛矿型氧化物,具有一定的可见光催化和多相类芬顿催化性能。在可见光照射且存在过氧化氢的情况下,BiFeO₃可活化过氧化氢并产生强氧化性物种,这些物种会攻击污染物分子从而使其降解。但BiFeO₃量子效率不高,光生电子和空穴容易复合;其活化过氧化氢的能力也有待提高。本文综述了近二十年来铁酸铋及其改性物作为可见光催化剂及多相类芬顿催化剂的研究进展,重点介绍了在制备过程中对其形貌的调控、贵金属沉积、离子掺杂、半导体复合、或负载于其他材料表面等改善其环境催化性能方法与效果,改性后发现BiFeO₃的可见光催化和多相类芬顿催化性能均得到提升。最后,对铁酸铋复合催化剂未来的发展方向进行了展望。更多还原

【Abstract】 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.更多还原