异相结/异质结TiO2光催化机理及降解有机物的研究

Photocatalytic mechanism of heterojunction / heterojunction TiO2 and degradation of organic compounds

摘要:

到目前为止TiO2是较为成熟的半导体光催化材料，但因TiO2分散性差、量子利用率低、比表面积小、难回收等问题难以工业化。多孔金属有机框架MOFs的引入可增强TiO2/MOFs复合材料的光吸收性能，提高电子-空穴对分离和提高回收率。基于TiO2/MOFs制备时前驱体添加顺序不同，综述了TiO2/MOFs的三种制备方法（即Ship-in-a-bottle法、Bottle-around-ship法、One-pot法）及TiO2/MOFs光催化机理与性能影响因素，并探讨不同MOFs与TiO2结合的作用机理。最后，对TiO2/MOFs存在的问题提出建议。

Abstract:

So far, TiO2 is a mature semiconductor photocatalytic material, but it is difficult to industrialize because of its poor dispersion, low quantum utilization, small specific surface area and difficult recovery. The introduction of porous metal organic framework MOFs can enhance the light absorption performance of TiO2/MOFs composites, improve the separation of electron hole pairs and improve the recovery. Based on the different addition order of precursors in the preparation of TiO2/MOFs, three preparation methods of TiO2/MOFs (Ship-in-a-bottle method, Bolt-around-ship method and One-pot method) and the photocatalytic mechanism and performance influencing factors of TiO2/MOFs were reviewed, and the binding mechanism of different MOFs with TiO2 was discussed. Finally, some suggestions on the problems of TiO2/MOFs are put forward.