【摘要】 利用 Ti O2 光催化氧化技术对 NOx 进行了净化研究 .在一定反应条件下 ,NOx 光催化氧化降解率很高 ,P-2 5的降解达 97% .考察了氧气、水含量等对 NOx 光催化氧化的影响 ,同时对 NOx 的吸附、光催化氧化动力学行为及机理进行了研究 .利用 FTIR分析确定反应产物 ,催化剂失活是由于反应产物硝酸吸附在催化剂表面所致更多还原

【Abstract】 The gas solid heterogeneous photocatalytic oxidation using TiO 2/UV was conducted, and it was found that the degradation efficiency of NO x in air was very high, reaching 97% in the ranges of experimental concentration. Some factors affecting NO photocatalytic destruction were investigated. The adsorption of NO x on TiO 2 thin film surface in the dark, photocatalytic reaction kinetics and mechanism were studied, and some important conclusions were drawn. The product of NO x photocatalysis was detected to be HNO 3 by FTIR. The greater part of HNO 3 was adsorbed on TiO 2 surface, causing catalyst deactivation, but when the catalyst was washed by water, its activity was regenerated as usual. In the end, NO x photocatalytic oxidation experiments were performed under sunlight irradiation, and NO x photocatalytic degradation yields remained high. The results showed that this process has potential applications to the elimination of NO x from the air.更多还原