可见光响应型Fe-MOFs复合催化剂及其去除水中毒害污染物的研究进展

Research progresses on visible light responsive Fe-MOFs composite catalysts and removal of toxic pollutants from water

总结了铁基金属有机框架材料(Fe-MOFs)的结构与特性,分析了有机配体/金属位点修饰、贵金属沉积、半导体复合及热解衍生4种改性方法的增强特性,阐明了典型可见光响应型Fe-MOFs复合催化剂还原Cr(Ⅵ)及降解典型难降解有机物的关键机制。指出未来研究的重点和难点包括:剖析催化剂微观结构和宏观性能间的构效关系,制备催化活性更优异的复合催化剂;提升Fe-MOFs复合催化剂在广泛pH范围内的适应性与稳定性;加强光电协同催化、多种高级氧化技术耦合等集成技术创新;强化复杂水环境中多种污染物的协同去除,充分发挥Fe-MOFs复合催化剂的氧化还原性能及其吸附、催化耦合特性。

The structure and characteristics of iron-based metal organic framework materials(Fe-MOFs)are summarized.The enhanced capabilities of four modification methods,including organic ligand/metal site modification,noble metal deposition,semiconductor combination and pyrolysis derivatization,are analyzed.The key mechanisms of typical visible light responsive Fe-MOFs composite catalysts for Cr(Ⅵ)reduction and typical refractory organic compound degradation are elucidated.It is pointed out that the focus and difficulty of future research include analyzing the structure-activity relationship between microstructure and macroscopic properties of the catalyst and preparing composite catalysts with better activity;improving the adaptability and stability of Fe-MOFs composite catalysts in a wide pH range;strengthening the innovation of integrated technologies such as photoelectric coordinated catalysis and multiple advanced oxidation technologies coupling;enhancing the collaborative removal of multiple pollutants from complex water environment and taking full advantage of the redox activety of Fe-MOFs composite catalyst as well as its adsorption and catalytic coupling capabilities.