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Influence of Ultraviolet Light on Photocatalytic TiO2 Materials

Hanson, Shannon / Tikalsky, Paul

${NO}_{x}$ gases affect the diurnal rise and fall of tropospheric ozone. By removing ${NO}_{x}$ gases through the use of titanium dioxide ( ${TiO}_{2}$ ) photocatalytic materials, tropospheric ozone concentrations could be reduced. Recent developments related to the photocatalytic pollution reduction capabilities of ${TiO}_{2}$ have led a movement to understand the material properties required to create construction materials which have the potential to reduce ${NO}_{x}$ air pollutants. A research program was undertaken to isolate variables that impact the kinetics of ${TiO}_{2}$ reaction. Six ${TiO}_{2}$ materials were tested for ${NO}_{x}$ removal efficiencies. The productive ${TiO}_{2}$ materials were then tested at multiple concentrations to determine the effect of ultraviolet (UV) irradiance on their efficiency to reduce ${NO}_{x}$ air pollutants. It was found that specific anatase ${TiO}_{2}$ phases manufactured and sized to have high levels of photocatalytic activity could reduce ${NO}_{x}$ air pollutants at high efficiencies. The ${NO}_{x}$ removal efficiency was 2.4 times higher at a UV irradiance of $1, 300 μW / {cm}^{2}$ than at $150 μW / {cm}^{2}$ , equivalent to a sunny or shady surface, respectively.

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Influence of Ultraviolet Light on Photocatalytic TiO2 Materials

Hanson, Shannon / Tikalsky, Paul

${NO}_{x}$ gases affect the diurnal rise and fall of tropospheric ozone. By removing ${NO}_{x}$ gases through the use of titanium dioxide ( ${TiO}_{2}$ ) photocatalytic materials, tropospheric ozone concentrations could be reduced. Recent developments related to the photocatalytic pollution reduction capabilities of ${TiO}_{2}$ have led a movement to understand the material properties required to create construction materials which have the potential to reduce ${NO}_{x}$ air pollutants. A research program was undertaken to isolate variables that impact the kinetics of ${TiO}_{2}$ reaction. Six ${TiO}_{2}$ materials were tested for ${NO}_{x}$ removal efficiencies. The productive ${TiO}_{2}$ materials were then tested at multiple concentrations to determine the effect of ultraviolet (UV) irradiance on their efficiency to reduce ${NO}_{x}$ air pollutants. It was found that specific anatase ${TiO}_{2}$ phases manufactured and sized to have high levels of photocatalytic activity could reduce ${NO}_{x}$ air pollutants at high efficiencies. The ${NO}_{x}$ removal efficiency was 2.4 times higher at a UV irradiance of $1, 300 μW / {cm}^{2}$ than at $150 μW / {cm}^{2}$ , equivalent to a sunny or shady surface, respectively.

Influence of Ultraviolet Light on Photocatalytic TiO2 Materials

Hanson, Shannon / Tikalsky, Paul

${NO}_{x}$ gases affect the diurnal rise and fall of tropospheric ozone. By removing ${NO}_{x}$ gases through the use of titanium dioxide ( ${TiO}_{2}$ ) photocatalytic materials, tropospheric ozone concentrations could be reduced. Recent developments related to the photocatalytic pollution reduction capabilities of ${TiO}_{2}$ have led a movement to understand the material properties required to create construction materials which have the potential to reduce ${NO}_{x}$ air pollutants. A research program was undertaken to isolate variables that impact the kinetics of ${TiO}_{2}$ reaction. Six ${TiO}_{2}$ materials were tested for ${NO}_{x}$ removal efficiencies. The productive ${TiO}_{2}$ materials were then tested at multiple concentrations to determine the effect of ultraviolet (UV) irradiance on their efficiency to reduce ${NO}_{x}$ air pollutants. It was found that specific anatase ${TiO}_{2}$ phases manufactured and sized to have high levels of photocatalytic activity could reduce ${NO}_{x}$ air pollutants at high efficiencies. The ${NO}_{x}$ removal efficiency was 2.4 times higher at a UV irradiance of $1, 300 μW / {cm}^{2}$ than at $150 μW / {cm}^{2}$ , equivalent to a sunny or shady surface, respectively.

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Title:

Influence of Ultraviolet Light on Photocatalytic TiO2 Materials

Contributors:

Hanson, Shannon (author) / Tikalsky, Paul (author)

Published in:

Journal of Materials in Civil Engineering ; 25 ; 893-898

Publication date:

2013-02-21

Size:

62013-01-01 pages

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0000715

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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