稀土钐掺杂TiO2型雾封层材料降解汽车尾气的应用  

Application of Sm-TiO2 fog sealing material in degradation of automobile exhaust

作　　者：孙凤 张向科[2] 贾晓东[2] Sun Feng;Zhang Xiangke;Jia Xiaodong(School of Civil Engineering,Chongqing Institute of Engineering,Chongqing 400056;College of Construction Engineering,Chongqing Technology And Business Institute,Chongqing 401520)

机构地区：[1]重庆工程学院土木工程学院,重庆400056 [2]重庆工商职业学院城市建设工程学院,重庆401520

出　　处：《化工新型材料》2019年第11期213-216,221,共5页New Chemical Materials

基　　金：重庆市高等职业技术院校新技术推广项目支持(GZTG201615);重庆工商职业学院校级科研项目资助(NDYB2018-07)

摘　　要：影响稀土钐(Sm)掺杂TiO2光催化剂(Sm-TiO2)活性的主要因素有Sm掺量、热处理时间和热处理温度。在超声辅助溶胶-凝胶法下设计正交试验探索3个因素对Sm-TiO2催化性能的影响,并将碳氢化合物(HC)降解效率最高的Sm-TiO2应用于雾封层材料降解汽车尾气,采用路面抗滑和渗水试验评价Sm-TiO2型雾封层材料的可用性,采用湿轮磨耗实验评价其耐用性。结果表明:在20min内,0.3g纯Sm-TiO2的HC降解率为75.97%,应用于雾封层时0.118kg/m2涂布量的Sm-TiO2降解率为32%;Sm-TiO2的加入能提高雾封层路面的抗渗性能,因此Sm-TiO2不仅可作为光催化材料缓解环境问题,也可作为提高雾封层渗水性能的一种外掺剂;Sm-TiO2型雾封层材料磨耗后依然具有一定的光催化活性。The main factors affecting the preparation of samarium(Sm)modified titanium dioxide(Sm-TiO2)photocatalyst were Sm content,heat treatment time and temperature.An orthogonal experiment was designed under ultrasonic assisted sol-gel method to explore the influence of three factors on the catalytic performance of Sm-TiO2.The results showed that the HC degradation rate of 0.3g pure Sm-TiO2 was 75.97% in 20 minutes,and Sm-TiO2degradation rate of 0.118kg/m^2 coating was 32% when was applied to fog seal.The usability of Sm-TiO2 fog seal material was evaluated by pavement anti-skid and seepage experiments.The results showed that the addition of Sm-TiO2 improved the water permeability of fog seal pavement.It showed that Sm-TiO2 can not only be used as photocatalytic material to alleviate environmental problems,but also as an external admixture to improve the water permeability of fog seal.The wear resistance of Sm-TiO2 fog seal material was evaluated by wet wheel wear test,and it showed that photocatalytic fog seal material had a certain photocatalytic activity.

关 键 词：稀土钐 Sm-TiO2光催化剂 雾封层 汽车尾气 耐用性 

分 类 号：O64[理学—物理化学]