静电纺纳米纤维光催化剂性能增强方法的研究进展

Research progress of performance enhancement methods for electrospun nanofiber-based photocatalyst

传统的纳米粉体光催化剂在使用过程中极易团聚,易流失,且难以分离回收,存在二次污染风险,光催化作为一种可高效利用太阳能进行污染物降解的高级氧化技术,具有环境友好的特点。首先介绍了单一组分静电纺纳米纤维光催化剂的研究进展及其存在的问题;在此基础上重点综述了增强改性静电纺纳米纤维光催化剂性能的方法,主要包括元素掺杂、表面贵金属负载、半导体复合、染料敏化以及接枝共轭聚合物,归纳总结了各种方法的合成手段、原理、优缺点和改进的方向。最后提出:未来应在开发具有高比表面积、高电子-空穴分离效率的新型光催化材料,以及具有多功能协同作用和高力学强度的新型光催化剂方面继续进行深入研究。

The traditional nano-powder photocatalyst is prone to agglomerate during use,easy to be drained away and difficult to separate and recover,further causing secondary pollution.Photocatalysis is an advanced oxidation technology that can efficiently use solar energy to degrade pollutants,and is environmental friendly.This paper briefly introduced the research progress and existing problems of the single-component electrospun nanofiber-based photocatalyst.Then on the basis of the existing problems,the methods for enhanced modification the performance of the electrospun nanofiber-based photocatalyst were summarized,including element doping,surface precious metal deposition,semiconductor recombination,dye sensitization and graft conjugated polymers.The synthesis methods,principles,advantages,disadvantages and improvement directions of various methods were summarized.It is proposed that further research should be carried out in the development of new photocatalytic materials with high specific surface area and high electron hole separation efficiency,as well as new photocatalysts with multi-functional synergy and high mechanical strength.