摘要
通过优化3DOM TiO_(2)的制备工艺,开发设计机动车尾气催化降解试验装置,测试并分析了乳化沥青种类、光催化剂种类和掺量、3DOM TiO_(2)孔径等因素对3DOM TiO_(2)雾封层材料光催化性能和降解耐久性的影响。研究结果表明:三维有序大孔结构的最佳焙烧温度为550℃;光催化剂掺量为2%、3DOM TiO_(2)孔径为300 nm时,由改性乳化沥青制备的雾封层材料具有更好的降解耐久性;适当增加光催化剂掺量可以提高光催化雾封层材料的降解耐久性;光催化剂种类和3DOM TiO_(2)孔径对雾封层材料的降解耐久性均无显著影响。该研究将纳米TiO_(2)制成三维有序大孔结构,并与雾封层技术相结合,以期提高纳米TiO_(2)对机动车尾气中NO_(x)气体的降解性能。
By optimizing the preparation process of 3DOM TiO_(2),developing and designing a catalytic degradation test device for motor vehicle exhaust,the effects of emulsified asphalt type,photocatalyst type and doping amount,3DOM TiO_(2) pore and other factors on the photocatalytic performance and degradation durability of 3DOM TiO_(2) fog seal material were tested and analyzed.The results show that the optimal roasting temperature of 3D macroporous structure is 550℃;The fog seal material prepared from modified emulsified asphalt has better degradation durability when the photocatalyst doping is 2% and the pore size of 3DOM TiO_(2) is 300 nm;The degradation durability of the photocatalytic fog seal material can be improved by appropriately increasing the photocatalyst doping;The type of photocatalyst and the pore size of 3DOM TiO_(2) has no significant effect on the degradation durability of the fog seal material.There is no obvious effect of photocatalyst type and 3DOM TiO_(2)pore size on the degradation durability of fog sealer materials.The nano-TiO_(2) is made into a 3D ordered macroporous structure and combined with the fog seal layer technology to improve the degradation performance of nano-TiO_(2) on NO_(x) gas of motor vehicle exhaust.
作者
李新舟
段墨渲
黎文杰
夏立翔
LiXinzhou;Duan Moxuan;Li Wenjie;Xia Lixiang(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architechture,Beijing 100044,China;Bejing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100082,China)
出处
《市政技术》
2023年第5期237-245,共9页
Journal of Municipal Technology
