A review on photocatalytic asphalt pavement designed for degradation of vehicle exhausts

Li, Xiaoqing; Wang, Fusong; You, Lihua; Wu, Shaopeng; Yang, Chao; Zhang, Lei; Barbieri, Diego Maria

doi:10.1016/j.trd.2023.103605

Cited by 16 publications

(4 citation statements)

References 128 publications

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“…The photogenerated electron-hole pairs play distinct roles in these reactions. 74,75 Electrons, which are excited to the CB, facilitate the reduction process, while the resulting holes in the VB are available to accept electrons, promoting the oxidation reaction. 76,77 To visually represent this alignment of energy levels, Fig.…”

Section: Photocatalysis For Hybrid Materialsmentioning

confidence: 99%

Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies

Ali,

Ismail,

Khan

et al. 2024

Nanoscale

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Section: Photocatalysis For Hybrid Materialsmentioning

confidence: 99%

Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies

Ali,

Ismail,

Khan

et al. 2024

Nanoscale

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“…This entailed the following procedures: (1) A Marshall specimen coated with a heat-reflective coating was placed face down in a container. (2) The container was filled with deionized water until the Marshall specimen was submerged by two-thirds. (3) Following the 24 h soaking period, the test piece was removed and any residual moisture was absorbed using filter paper.…”

Section: Water Resistancementioning

confidence: 99%

“…Numerous studies have shown that photocatalytic technology has significant potential in the field of exhaust degradation and purification [2][3][4]. It offers an attractive opportunity to address environmental remediation effectively and sustainably [5,6].…”

Section: Introductionmentioning

confidence: 99%

Implementing All-Weather Photocatalysis of Exhaust Fumes Based on the g-C3N4/TiO2/SrAl2O4: Eu2+, Dy3+ Ternary Composite Coating

Zhou,

Li,

Cui

et al. 2024

Buildings

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This study examines the use of SrAl2O4: Eu2+, Dy3+ long-afterglow materials doped into g-C3N4/TiO2 coatings for photodegradation. The prepared sample was tested for the purification of automotive exhaust fumes, with the optimal mass ratio of g-C3N4/TiO2 and SrAl2O4: Eu2+, Dy3+ determined to be 1:1. Characterization tests, including XRD, FT-IR, XPS, and TG-DSC, were conducted to evaluate the microstructure and properties of the samples. Under poor lighting conditions, g-C3N4/TiO2 reduced CH and NOx by 59 ppm and 13 ppm within 4 h, respectively, while g-C3N4/TiO2/SrAl2O4: Eu2+, Dy3+ decreased CH and NOx by 98ppm and 34ppm, respectively, resulting in a significant improvement in degradation efficiency. The addition of long-afterglow materials significantly improves the efficiency of photocatalysts in purifying exhaust fumes in low-light environments, providing potential value for all-weather exhaust treatment in the future.

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“…The energy gap between these two bands is called the forbidden band. Nano-TiO 2 exhibits photocatalytic properties when irradiated by UV light with energy greater than or equal to the forbidden bandwidth of 3.2 eV, corresponding to a wavelength of 387.5 nm or less [41][42][43]. In this case, electrons in the VB leap to the CB, forming holes (h + ) in the VB and hole-electron pairs with strong redox capabilities.…”

Section: Mechanism Of Nano-tio 2 Cement Slurry Photocatalytic Degrada...mentioning

confidence: 99%

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

Kuang,

Ding,

Peng

et al. 2023

Catalysts

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Nano-TiO2 combined with cement slurry can be utilized to degrade nitrogen oxides (NOx) in vehicle exhaust, making it an excellent photocatalytic material for air purification. In practice, environmental factors can significantly affect the photocatalytic performance. In this study, a vehicle exhaust test system was developed, and the test methods and evaluation criteria for the degradation test are provided. This study investigated the photocatalytic degradation of NO2 using nano-TiO2 cement slurry through laboratory tests. The effects of temperature, relative humidity, ultraviolet (UV) radiation flux, cement slurry thickness, surface dust adherence, and the number of water rinsing cycles were examined. Additionally, nano-TiO2 cement slurries were applied to an expressway toll station. The results showed that the efficiency of photocatalytic degradation was significantly influenced by temperature and UV radiation flux, while the thickness of the cement slurry had minimal impact. The photocatalytic degradation efficiency was negatively correlated to the relative humidity, when the relative humidity of the cement slurry specimens was high. This is because the excess water (H2O) competes with NO2 for adsorption. The photocatalytic performance of the samples was significantly reduced by surface dust and rain erosion, as both led to a decrease in the amount of nano-TiO2 participating in the reaction. Furthermore, the photocatalytic material has wide-ranging potential applications. The findings of this study would support the promotion of environmentally friendly roads as a strategy to combat air pollution.

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A review on photocatalytic asphalt pavement designed for degradation of vehicle exhausts

Cited by 16 publications

References 128 publications

Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies

Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies

Implementing All-Weather Photocatalysis of Exhaust Fumes Based on the g-C3N4/TiO2/SrAl2O4: Eu2+, Dy3+ Ternary Composite Coating

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

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A review on photocatalytic asphalt pavement designed for degradation of vehicle exhausts

Cited by 16 publications

References 128 publications

Charge transfer in TiO2-based photocatalysis: fundamental mechanisms to material strategies

Charge transfer in TiO2-based photocatalysis: fundamental mechanisms to material strategies

Implementing All-Weather Photocatalysis of Exhaust Fumes Based on the g-C3N4/TiO2/SrAl2O4: Eu2+, Dy3+ Ternary Composite Coating

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

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Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies

Charge transfer in TiO₂-based photocatalysis: fundamental mechanisms to material strategies