二氧化钛紫外光催化降解有机废气研究进展

挥发性有机污染物(VOCs)是近年来逐渐被人们所重视的大气污染物之一,对这类大气污染物的控制尚缺少经济有效的技术手段。现在比较广泛采用的治理技术如吸收法、吸附法、冷凝法和燃烧法等都普遍存在投资运行费用高、容易引起二次污染等问题。而二氧化钛(TiO)2紫外光催化技术是近年来兴起的污染治理技术,具有费用低、净化效率高,无二次污染等特点。文章在综述TiO2催化原理、催化剂制备和结构表征等的基础上,重点介绍了这类催化剂在含氯、芳香烃类、醛酮类、含氮硫恶臭类等有机废气污染治理中的应用,并简要探讨了TiO2紫外光催化技术的发展前景。

Progress on TiO_2-based UV Photocatalysis for Degradation of Organic Waste Gas

Volatile organic compounds(VOCs) are one of atmospheric pollutants that have caused great attentions in recent year.However there is still lack of cost-effective methods for control of these pollutants.Some traditional treatments,like adsorption,condensation and combustion,have many disadvantages such as high operating cost and secondary pollution.TiO2-based UV photocatalysis is a novel pollution control technology raised in recent years,which has characteristics of lower cost and higher removal efficiencies,without any secondary pollution.TiO2-based catalytic mechanism,catalyst preparation and structural characterization were reviewed.Applications of TiO2-based UV photocatalysis in waste gas including chlorine,aromatic hydrocarbons,aldehydes and ketones,a nitrogen-containing sulfur-containing treatment were also introduced.Potential applications of TiO2-based UV photocatalysis were also briefly discussed.