Photocatalytic Oxidation of under Visible Light on Asphalt-Pavement Surface
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 9
Abstract
This work examines the potential use of heterogeneous photocatalysis as an innovative oxidation technology. The aim is to demonstrate that this technology can reduce the damaging effects of vehicle emissions by using nitrogen doped (N-doped) as a photocatalyst immobilized above the asphalt road surface. In the study, the photocatalytic effectiveness and durability of N-doped photocatalytic asphalt road material were assessed in both the laboratory and the field using direct and indirect measurement. The experimental results show that under visible light irradiation, N-doped asphalt road material has a higher activity compared with pure asphalt road material. The decontamination rate for is approximately 27.6, 24.6, 16.3, and 13.8% under irradiation at light wavelengths of 330–420, 430–530, 470–570 and 590–680 nm, respectively. Results of the field test and prediction models suggest that the service life of N-doped asphalt road material is approximately 13 months.
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Acknowledgments
The authors gratefully acknowledge the funding support by the National Natural Science Foundation of China (Grant Nos. 31470611 and 51378096), Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120062120011), the Natural Science Foundation of Heilongjiang Province (Grant No. E2015055) and the Fundamental Research Funds for the Central Universities (Grant No. 2572014CB16), respectively.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Oct 11, 2016
Accepted: Feb 8, 2017
Published online: May 18, 2017
Published in print: Sep 1, 2017
Discussion open until: Oct 18, 2017
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