Influence of Ultraviolet Light on Photocatalytic Materials
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 7
Abstract
gases affect the diurnal rise and fall of tropospheric ozone. By removing gases through the use of titanium dioxide () photocatalytic materials, tropospheric ozone concentrations could be reduced. Recent developments related to the photocatalytic pollution reduction capabilities of have led a movement to understand the material properties required to create construction materials which have the potential to reduce air pollutants. A research program was undertaken to isolate variables that impact the kinetics of reaction. Six materials were tested for removal efficiencies. The productive materials were then tested at multiple concentrations to determine the effect of ultraviolet (UV) irradiance on their efficiency to reduce air pollutants. It was found that specific anatase phases manufactured and sized to have high levels of photocatalytic activity could reduce air pollutants at high efficiencies. The removal efficiency was 2.4 times higher at a UV irradiance of than at , equivalent to a sunny or shady surface, respectively.
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Acknowledgments
The research was supported in part by the FHWA Dwight David Eisenhower Transportation Fellowship Program and by the Achievement Rewards for College Scientists, Utah Chapter.
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© 2013 American Society of Civil Engineers.
History
Received: Jun 12, 2012
Accepted: Oct 11, 2012
Published online: Feb 21, 2013
Published in print: Jul 1, 2013
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