Jang Dae-Seong, Kim Sang-Hoon, Kim Young, Lee Jae-Jun, An Deok-Soon
Department of Civil Engineering, Jeonbuk National University, Jeonju-si 54896, Jeollabuk-do, Korea.
95, BnD Networks, Co., Ltd., Sandanoryong-gil, Samgi-myeon, Iksan-si 54524, Jeollabuk-do, Korea.
Materials (Basel). 2021 Dec 16;14(24):7805. doi: 10.3390/ma14247805.
Harmful nitrogen oxides (NO) are produced by vehicles, factories, mines, and power plants. In fact, over one million tons of NO are emitted into the atmosphere every year, making it the most prevalent air pollutant. Approximately 45% of the emitted NO in Korea is associated with the transportation sector. In this paper, the application of a new TiO photocatalyst on the asphalt roads to remove combustion-produced NO was studied. In an effort to overcome the known constructability, adhesion, cost, and dispersion problems associated with TiO photocatalysts, the liquid polyurethane (PUD) was added with TiO to form a mixture later known as liquid PUD-TiO. Laboratory and field tests were conducted to determine the optimum amount of photocatalyst to be used and the performance of asphalt pavement coated with PUD-TiO in terms of indirect tensile strength, water susceptibility, and rutting resistance. Additionally, the performance of PUD-TiO under different humidity, wind speed, and temperature conditions was also evaluated. The results showed that the application of PUD-TiO photocatalyst on the asphalt pavements road reduces the NO available on the surface of the road. The PUD-TiO also was found to have no effects on the performance of asphalt pavement. Meanwhile, under different weather conditions, the reaction between the photocatalyst and NO is mainly affected by the humidity.
有害氮氧化物（NO）由车辆、工厂、矿山和发电厂产生。事实上，每年有超过一百万吨的NO排放到大气中，使其成为最普遍的空气污染物。在韩国，约45%的排放NO与交通运输部门有关。本文研究了一种新型TiO光催化剂在沥青道路上用于去除燃烧产生的NO的应用。为了克服与TiO光催化剂相关的已知可施工性、附着力、成本和分散性问题，在液态聚氨酯（PUD）中添加TiO以形成一种混合物，即后来所知的液态PUD-TiO。进行了实验室和现场测试，以确定光催化剂的最佳用量以及涂有PUD-TiO的沥青路面在间接拉伸强度、水敏感性和抗车辙性方面的性能。此外，还评估了PUD-TiO在不同湿度、风速和温度条件下的性能。结果表明，PUD-TiO光催化剂在沥青路面上的应用减少了道路表面的NO。还发现PUD-TiO对沥青路面性能没有影响。同时，在不同天气条件下，光催化剂与NO之间的反应主要受湿度影响。
