随着越来越多的轿车走进千家万户,人们在车内停留的时间越来越长,但车内空间狭窄且密闭使车内有害气体严重超标,尤以甲醛为主的挥发性有机化合物的消除面临着严峻的挑战。二氧化钛(TiO2)作为一种很有前景的光催化剂,已有国内外研究证明TiO2对甲醛具有良好的光催化降解效果。通过介绍车内存在甲醛的危害,阐述TiO2光催化技术对甲醛降解的机理、影响光催化反应的因素;同时,针对TiO2在降解甲醛过程中存在的缺陷,介绍了几种TiO2掺杂改性的方法,对现领域中存在的一些问题进行了总结和归纳,并对未来发展前景作出了展望。
With more and more cars into thousands of households,people stay longer time in them,but the narrow and enclosed space of the car makes the harmful gases in the car seriously exceed the standard,especially volatile organic compounds like formaldehyde.Eliminating these compounds faces severe challenges.As a promising photocatalyst,titanium dioxide (TiO2) has been proved to have a good photocatalytic degradation effect on formaldehyde in domestic and foreign studies.This paper described the harm of formaldehyde in the car,the mechanism of TiO2 photocatalytic technology on formaldehyde degradation,and the factors affecting the photocatalytic reaction.At the same time,aiming at the defects of TiO2 in the process of degrading formaldehyde,several methods of TiO2 doping modification were introduced,some problems in the current field were summarized and concluded,and the future development prospects were discussed.
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