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

Abstract

The NOx degradation performance of nano-TiO2 as a coating material for the road environment was evaluated in this research. The nano-TiO2 coating materials for both road surface and roadside were prepared by using anatase nano-TiO2, 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 NOx 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 NO2 with different dosages of surfactant. The results showed that when the mass ratio of nano-TiO2 and surfactant was about 1:2, the catalytic degradation effect of the material was the best.

Polyethylene Terephthalate Degradation by Microalga Chlorella vulgaris Along with Pretreatment

“…Once an enzyme-like PETase or laccase has initiated the PET degradation. It is speculated that its byproducts can be further acted upon by some other enzymes produced by other microbial consortia present in the same environment [45][46][47][48][49][50][51][52][53][54].…”

NOx-Reduction Performance Test for TiO2 Paint

“…From 2000 to 2010, only two studies were conducted in which TiO 2 photocatalysts were mixed with concrete and cement [ 31 , 32 ]. However, seven studies were conducted from 2010 to 2020 [ 29 , 33 , 34 , 35 , 36 , 37 , 38 ]. These studies mainly focused on road pavement materials, exterior materials, and roof finishing materials.…”

“…A review of previous studies on the application of TiO 2 is presented below. The most representative applications are cement road materials, which include pavement blocks [ 29 ], asphalt pavement [ 33 , 36 , 37 ], and mortar [ 34 , 35 ]. The reduction in NO x concentration was examined by adding TiO 2 photocatalysts to these cement road materials, and it was observed that the NO x concentration can be reduced by up to 60–80% [ 31 ].…”

“…The reduction in NO x concentration was examined by adding TiO 2 photocatalysts to these cement road materials, and it was observed that the NO x concentration can be reduced by up to 60–80% [ 31 ]. Yu et al investigated NOx concentration reduction performance based on automobile exhaust gas concentration through field measurement and verified the optimal mass ratio [ 36 ]. Wang et al investigated the effect of exhaust gas decomposition by setting the UV irradiance as 26.7 W/m 2 , which is the average outdoor illumination, and it was confirmed that exhaust gas decomposition can be achieved when the nano-TiO 2 content is 8% [ 37 ].…”

Morphology and Mechanical Properties of Polyethylene Terephthalate/Ethylene Propylene Diene Monomer (PET/EPDM) in the Presence of Nanoclay

“…However, this substance has certain disadvantages, such as sensitivity to cracks [8] and low strength against atmospheric factors. Therefore, engineers are trying to increase the toughness of this polymer with the addition of an elastomeric phase to overcome the mentioned shortages [9][10][11][12][13][14][15][16][17][18]. One way to improve the mentioned properties is to add an elastomeric phase to increase the toughness [19,20].…”