【摘要】 将纳米TiO₂掺加于雾封层中喷涂在道路表面,不仅可用于道路预防性养护,还可降解汽车尾气,具有重要的应用价值。选择氮掺杂二氧化钛与50 nm锐钛矿二氧化钛,应用方式采用水溶液型和雾封层型,基于室外尾气降解试验与车轮磨耗试验,研究两种纳米TiO₂对NO_X与CO的降解效能并进行降解耐久性分析。结果表明:相较普通纳米TiO₂,雾封层型氮掺杂二氧化钛对NO_X与CO降解效能分别提高44. 8%和38. 8%;车轮磨耗试验后,雾封层型对NO_X与CO降解效能比水溶液型高4. 0%和3. 7%,说明雾封层型氮掺杂二氧化钛的降解效能优良且降解耐久性较好。更多还原

【Abstract】 Photocatalytic fog sealsare prepared by adding the nano titanium dioxide in fog seal emulsions. It can not only be used for road preventive maintenance,but also degrade automobile exhaust gas,so it has important application value. Two types of TiO₂,N-TiO₂ and 50 nm anatase TiO₂ particles were selected and suspended in water and emulsified asphalt. Based on the outdoor exhaust gas degradation test and wheel wear test,the degradation performance of NO_X and CO was tested and the degradation durability was analyzed. The results indicated that the degradation efficiency of photocatalytic fog seal containing N-doped TiO₂ for NO_X and CO were increased by 44. 8% and 38. 8% compared with anatase TiO₂. After the wearing test,its degradation efficiency of NO_X and CO were 4. 0% and 3. 7% higher than that of aqueous solution. It showed the durability of degradation efficiency for fog seal was significantly better than that of the aqueous solution.更多还原