Photocatalytic pavements with epoxy-bonded TiO2-containing spreading material

Wang, Dawei; Leng, Zhen; Hüben, Michael; Oeser, Markus; Steinauer, Bernhard

doi:10.1016/j.conbuildmat.2015.12.164

Cited by 80 publications

(38 citation statements)

References 23 publications

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“…Good efficiencies of DSSCs have been obtained by the use of transition metal phthalocyanines (TMPcs), including iron phthalocyanine (FePc) as the light harvester [5,6]. Although numerous applications are based on titanium dioxide nanomaterials [7][8][9], well defined single crystalline rutile or anatase TiO 2 surfaces can serve as a model system.…”

Section: Introductionmentioning

confidence: 99%

FePc and FePcF16 on Rutile TiO2(110) and (100): Influence of the Substrate Preparation on the Interaction Strength

et al. 2019

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Interface properties of iron phthalocyanine (FePc) and perfluorinated iron phthalocyanine (FePcF 16 ) on rutile TiO 2 (100) and TiO 2 (110) surfaces were studied using X-ray photoemission spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and low-energy electron diffraction (LEED). It is demonstrated that the interaction strength at the interfaces is considerably affected by the detailed preparation procedure. Weak interactions were observed for all studied interfaces between FePc or FePcF 16 and rutile, as long as the substrate was exposed to oxygen during the annealing steps of the preparation procedure. The absence of oxygen in the last annealing step only had almost no influence on interface properties. In contrast, repeated substrate cleaning cycles performed in the absence of oxygen resulted in a more reactive, defect-rich substrate surface. On such reactive surfaces, stronger interactions were observed, including the cleavage of some C-F bonds of FePcF 16 .

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Section: Introductionmentioning

confidence: 99%

FePc and FePcF16 on Rutile TiO2(110) and (100): Influence of the Substrate Preparation on the Interaction Strength

et al. 2019

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“…To make the index more than 50% or 25%, the average illumination of road surface needs to be not less than 60 lx or 40 lx, respectively. The data show that the NO degradation rate of this method is higher than that described in other literature, under the basic similar and convertible conditions [7][8][9].…”

Section: Discussionmentioning

confidence: 76%

“…HC, NO and CO compounds can be transformed into salt and water by nano-TiO 2 under photocatalysis that is an irradiation by a light source with a wavelength less than 387.5 nm [7,8]. Therefore, we needed to select a scheme to make titanium dioxide more in contact with air and ultraviolet light in the design.…”

Section: Tio 2 Powdermentioning

confidence: 99%

“…In order to solve the vehicle exhaust accumulation problem in the stage of operation, in recent years, researchers in road work have considered vehicle carrier-road pavement materials and developed many new degradable automobile exhaust pavement materials [6][7][8]. These photocatalysts are dissolved in a solution and sprayed on the surface of the road to be exposed to automobile exhaust and sunlight.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Photocatalytic Effect of Nano TiO2 Epoxy Emulsified Asphalt Mixture

Huang

Wen

2019

Applied Sciences

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The two major problems that have plagued urban underground roads since their introduction are the harmful emissions caused by hot mix paving and vehicle exhaust accumulation during operation. In order to solve these two problems at the same time, a new asphalt mixture degrading automobile exhaust, which has the advantage of cold mix and cold-application, was presented and studied. A considerable amount of research shows that the use of titanium dioxide (TiO2) for pavements has received considerable attention in recent years to improve air quality near large metropolitan areas. However, the proper method of applying TiO2 to asphalt pavements is still unclear. The new mixture presented in this article contains epoxy emulsified asphalt as the binder; therefore, how to apply TiO2 in the special asphalt mixture proves to be the main focus. By experimental design, four influence factors on the photocatalytic effect, which are the nano-TiO2 particle sizes, dosage, degradation time, and light intensity, have been investigated. The experimental results showed that the 5-nm particle size of TiO2 is better than 10–15 nm for exhaust gas degradation, especially for HC and NO; with an increase in the amount of photocatalytic material, the degradation of CO and CO2 in the exhaust gas did not increase obviously, while the degradation effects of HC and NO were remarkable; in the 4-h time extended degradation test, the experimental data show that the extended time has little effect on the degradation rate of CO2 and CO, and the general trend is that the degradation of exhaust became significant with the extension of time; while setting a 2-h NO degradation rate as an indicator, to make the index more than 50% or 25%, the average illumination of the road surface cannot be less than 60 lx or 40 lx.

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“…Regarding the spraying coating technique, the literature reports the application of aqueous solutions 3,6,19,25 and other ones with emulsions 20 , cement and resins 28,33 , polymers 34 and rubber 22 in order to achieve a better immobilization process. An important concern that should be taken into account when it is desired to obtain photocatalytic aqueous solutions is the dispersion of the TiO2 nanoparticles; otherwise they may agglomerate and, consequently, decrease the photocatalytic efficiency.…”

Section: Photocatalytic Asphalt Pavementsmentioning

confidence: 99%

Photocatalytic and smart asphalt mixtures: a brief overview

Segundo

Freitas

Júnior

et al. 2019

Fourth International Conference on Applications of Optics and Photonics

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Nowadays, there is an increasing concern about the use of less harmful techniques to the environment, and about road safety in Transportation Engineering. Heterogeneous photocatalysis based on the application of semiconductors materials onto asphalt mixtures is a promising technology because it can mitigate air pollution and road accidents. The functionalized asphalt mixtures with photocatalytic capability can degrade pollutants, such as damaging gases and oil/greases over their surface from specific reactions triggered by sunlight photons, providing significant environmental and social benefits. In this communication, a brief review of photocatalysis applied in asphalt mixtures will be presented.

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Photocatalytic pavements with epoxy-bonded TiO2-containing spreading material

Cited by 80 publications

References 23 publications

FePc and FePcF16 on Rutile TiO2(110) and (100): Influence of the Substrate Preparation on the Interaction Strength

FePc and FePcF16 on Rutile TiO2(110) and (100): Influence of the Substrate Preparation on the Interaction Strength

Experimental Study on Photocatalytic Effect of Nano TiO2 Epoxy Emulsified Asphalt Mixture

Photocatalytic and smart asphalt mixtures: a brief overview

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