采用浸渍法制备Fe-Mn/TiO₂双金属催化材料,以双酚A(BPA)为目标降解物,探究了Fe-Mn/TiO₂对其的降解效果及降解机制。结果表明,Fe-Mn/TiO₂催化臭氧氧化降解BPA的去除率相较于单独TiO₂处理提升了83.4%;Fe、Mn成功负载且催化剂孔洞较丰富;相较于TiO₂,Fe-Mn/TiO₂中锐钛矿质量分数增加能产生更多的羟基自由基。同时,Fe、Mn在TiO₂表面能发生价态转化,可作为活性位点促进臭氧分解为·OH等活性物质,增强催化反应活性。

Fe-Mn/TiO₂ bimetallic catalytic material is prepared via the impregnation method,and the degradation effect and mechanism of Fe-Mn/TiO₂ are explored by degrading bisphenol A.The results show that the removal rate of BPA degradation through ozone oxidation over Fe-Mn/TiO₂ is 83.4% higher than that over TiO₂ treatment alone.Fe and Mn are successfully loaded,and the catalyst is rich in pore.The increase of anatase mass fraction in Fe-Mn/TiO₂ can generate more hydroxyl radicals than that in TiO₂.Meanwhile,both Fe and Mn can undergo valence transformation on the surface of TiO₂,which can be used as active sites to promote ozone to decompose into ·OH and other active substances,and enhance the catalytic reaction activity.

薛代惠美(1998-),女,硕士生,研究方向为水污染控制,dada0686@163.com