公路水泥混凝土路面喷涂纳米TiO_2净化机动车排放污染物研究

Study on Decontamination of Vehicle Emissions by Nano-TiO_2 Sprayed on Highway Concrete Pavement

依据纳米TiO2光催化降解特性，进行纳米TiO2最佳添加量和表面活性剂使用量的优化配比试验，并利用喷涂负载技术，研制了水泥混凝土纳米TiO2光催化环保材料，从而净化机动车排放污染物。通过自行开发设计的室内模拟自动检测系统试验，得出纳米TiO2最佳添加量为5％，表面活性剂最佳使用量为3％的优化配比方案；同时证明了采用渗透负载技术制备的水泥混凝土纳米TiO2光催化环保材料在2mm磨损范围内，仍具有良好净化效果。在此理论研究基础上，进行了实际公路环境应用，并通过TiO2喷涂区与非喷涂区对比测试试验验证，结果表明该环保材料的有效净化范围在6％-12％。

Based on decontamination of vehicle emissions by using nanometer titanium dioxide （nano-TiO2 ） photocatalysis method, optimization about content of nano-TiO2 and surfactant were tested and the nano-TiO2 environmental protection materials for concrete pavement were developed by utilizing permeability technology to decontaminate vehicle emissions. By testing with a kind of automatism testing systems designed by ourselves, the optimized matching scheme was obtained： the content of nano-TiO2 is 5% and content of surfactant is 3% .At the same time the experiments show that the nano-TiO2 environmental protection materials for concrete pavement made by permeability technology has good decontamination effect in 2 mm wearing and tearing thickness. On the basis of this research, the productions were used in road environment. The decontamination effect was tested by contrast in TiO2 spraying section and non-spraying section. The result show that decontamination rate of the productions is from 6% to 12%.