光触媒降除空气污染物效果评价

Evaluation on effectiveness of photocatalyst in degradation of air pollutants

摘要: 目的探讨光触媒对空气污染物(甲醛、氨、苯和二甲苯)的降解效果。方法采用密闭良好的60L玻璃静式染毒柜,将光触媒与甲醛、氨、苯、二甲苯作用后,在不同时间段对其浓度进行检测,根据指标浓度的变化评价光触媒对空气污染物降解的效果,并观察了光触媒对家具板材的甲醛降除效果。结果光触媒以空气中的甲醛、氨、苯、二甲苯均有明显降除作用,其中,对甲醛、氨和二甲苯的降除作用达到90%以上,对苯的降除效果达70%以上;另外,光触媒对家具板材的甲醛也有明显地降解作用。结论光触媒具有降解空气中常见污染物如甲醛、苯、氨和二甲苯作用,其降除机制有待于进一步研究。

Abstract: Objective To determine the effects of photocatalyst in degradation of air pollutants.Methods The sealed cabinets were used to obseve the effects of degradation on formaldehyde,ammonia.benzene,xylene by photocatalyst at differnet time points.Results Photocatalysthad very strong effects of degradation on formaldehyde,ammonia,benzene,and xylene.There were more than 90%decomposed on formaldehyde,ammonia and xylene and more than 70% in benzene by photocalyst.Photocatalyst also possessed to decompose the formaldehyde releasing from board of furniture.Conclusion Photocatalyst could decompose air pollutants such as formaldehyde,ammonia,benaene and xylene and its mechanism need to be studied further.