Performance Study of 3DOM Fog Seal Material for Photocatalytic Degradation of NO in Vehicle Exhaust
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 12
Abstract
In this study, to solve the problem of reduced efficiency of NO degradation due to the agglomeration effect of nanoparticles, nano- was converted to a 3D-ordered microporous [three-dimensional ordered macroporous (3DOM)] structure and combined with fog seal technology, which is expected to improve the degradation performance of nano- on NO gas in automobile exhaust. We optimized the preparation process parameters of 3D-ordered macroporous (3DOM) and developed and designed an experimental device for exhaust-gas catalytic degradation. We further tested and analyzed the effects of emulsified asphalt type, photocatalyst type, doping amount, and 3DOM pore size on the photocatalytic performance of 3DOM fog seal material. The effects of 3DOM fog seal material on road antiskid performance were evaluated herein. The results show that the optimal coating volume of the PS microsphere solution is . The optimal filling time of the precursor solution is 20 min for the preparation of 3DOM materials by the sandwich method. The degradation efficiency of 3DOM fog seal material for the optimal pore size was 17.0%, 15.0%, and 25.1% higher than that of nano-, respectively. The 3D-ordered pore structure reduces the agglomeration effect of nano- Thus, the degradation efficiency is improved. With the increase of 3DOM doping, the degradation efficiency of fog seal materials gradually increased. However, the increment of degradation efficiency decreased. The appropriate increase of 3DOM pore size is beneficial to the catalytic effect of light. If the pore size is significantly large, the emulsified asphalt will block the pore space and reduce the contact area between 3DOM and exhaust gas. The optimal pore size is 300 nm. The type of emulsified asphalt on 3DOM fog seal material degradation effect is not significant. The antislip performance of the pavement coated with 3DOM fog seal materials can meet the requirements of specifications. The photocatalyst doping amount, type, and different 3DOM pore sizes do not significantly affect the antislip performance of the fog seal. The novel 3DOM photocatalytic pavement material proposed in this study is of positive significance for the reduction of automobile exhaust pollution.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
This work was funded by the National Key R&D Program of China (2022YFB2601900), the Beijing Advanced Innovation Center for Future Urban Design (Grant No. UDC2019032624), and the research project of the National Natural Science Foundation of China (Grant Nos. 51978035 and 52278425). This study is sponsored by the BUCEA Post Graduate Innovation Project.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 25, 2022
Accepted: Apr 21, 2023
Published online: Sep 19, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 19, 2024
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