挥发性有机物光催化降解研究进展

Study Progress on Photocatalytic Degradation of Volatile Organic Compounds

阐述了挥发性有机物(VOCs)光催化降解的基本原理,分析了气相条件下不同VOCs的降解途径以及O_2和H_2O在光催化反应中的作用、光催化反应过程的传质和动力学规律,提出了反应器设计需要遵循的基本原则,叙述了VOCs光催化降解的催化剂及其失活现象、已研究的VOCs的光催化降解效率、部分物质难光催化降解的原因,讨论了VOCs光催化降解进一步研究的方向和应用前景。

This paper systematically reviewed the current study of photocatalysis of VOCs. Firstly, the degradation paths of different VOCs in gas phase were analyzed on the basis of the basic principles of photocatalysis, as well as the role of O2 and H2O in reaction. Secondly, mass transfer and kinetics of reaction were described, thus the basic principle for the reactor design was defined. The variation of photocatalyst performance during the photocatalysis process and immobilization of photocatalyst for application were also introduced. Furthermore.the current study about the effciency of VOCs degradation including the degradation rate and the completeness of degradation product were reviewed, and the cause of poor photocatalytic degradation was explained. Finally, further research efforts and the possible application of VOCs photocatalysis were discussed.