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The NO x degradation performance of nano-TiO 2 as a coating material for the road environment was evaluated in this research. The nano-TiO 2 coating materials for both road surface and roadside were prepared by using anatase nano-TiO 2 , activated carbon powder, silane coupling agent and deionized water. The impact of varying amounts of coating material and silane coupling agent were evaluated. The road environment of NO x degradation was simulated by the photocatalytic test system designed by the research team. For the road surface coating, the photocatalytic degradation experiments of NO under different radiation intensities were carried out. The results show that the material has good photocatalytic degradation performance, and the proper amount of silane coupling agent can enhance the bonding performance of the material and asphalt mixture. For the roadside coating, sodium dodecylbenzene sulfonate was selected as the surfactant to carry out the photocatalytic degradation experiment of NO 2 with different dosages of surfactant. The results showed that when the mass ratio of nano-TiO 2 and surfactant was about 1:2, the catalytic degradation effect of the material was the best.

The NOx Degradation Performance of Nano-TiO2 Coating for Asphalt Pavement