Photocatalytic Concrete for NOx Abatement: Supported TiO2 efficiencies and impacts

Lu Yang; Amer Hakki; Li Zheng; M. Roderick Jones; Fazhou Wang; Donald E. MacPhee

doi:10.1016/j.cemconres.2018.11.002

Photocatalytic Concrete for NOx Abatement: Supported TiO₂ efficiencies and impacts

Lu Yang, Amer Hakki, Li Zheng, M. Roderick Jones, Fazhou Wang^* (Corresponding Author), Donald E. MacPhee^* (Corresponding Author)

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

7 Downloads (Pure)

Abstract

The potential of TiO2-based photocatalysts in mitigating the effects of environmental pollutants is evident in the scientific literature but the large-scale implementation of photocatalytic concretes still appears limited, despite the current global concerns over urban NOx pollution. Improvements in cost effectiveness are required to enhance the case for a photocatalyst-modified infrastructure and this must address catalyst efficiency, catalyst loading and performance durability. This paper compares photocatalytic efficiencies of supported TiO2 on mortar surfaces with the more conventional TiO2 dispersed in mortar. The influences of environmental conditions, such as NO concentration and flow rate, UVA light intensity and relative humidity, on photocatalytic performance are also investigated using photonic efficiency as an indicator. The supported TiO2 shows greater degradation of NOx (De-NOx), at about 9 times higher than TiO2 powder dispersed in the mortar, ca. 150 times higher utilization efficiency, than that of TiO2 in traditional photocatalytic mortar (with 5% loading).

Original language	English
Pages (from-to)	57-64
Number of pages	8
Journal	Cement and Concrete Research
Volume	116
Early online date	15 Nov 2018
DOIs	https://doi.org/10.1016/j.cemconres.2018.11.002
Publication status	Published - 1 Feb 2019

Bibliographical note

The authors gratefully acknowledge funding from the UK Engineering and Physical Sciences Research Council (Grant Ref: EP/M003299/1) and the Natural Science Foundation of China (No. 51478370 and 51461135005) International Joint Research Project (EPSRC-NSFC)

Keywords

Photocatalytic concrete
Supported TiO2
NOx
utilizations
environmental factors

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cemconres.2018.11.002Licence: Unspecified

Accepted Manuscript
© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 2.04 MBLicence: CC BY-NC-ND

Cite this

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title = "Photocatalytic Concrete for NOx Abatement: Supported TiO2 efficiencies and impacts",

abstract = "The potential of TiO2-based photocatalysts in mitigating the effects of environmental pollutants is evident in the scientific literature but the large-scale implementation of photocatalytic concretes still appears limited, despite the current global concerns over urban NOx pollution. Improvements in cost effectiveness are required to enhance the case for a photocatalyst-modified infrastructure and this must address catalyst efficiency, catalyst loading and performance durability. This paper compares photocatalytic efficiencies of supported TiO2 on mortar surfaces with the more conventional TiO2 dispersed in mortar. The influences of environmental conditions, such as NO concentration and flow rate, UVA light intensity and relative humidity, on photocatalytic performance are also investigated using photonic efficiency as an indicator. The supported TiO2 shows greater degradation of NOx (De-NOx), at about 9 times higher than TiO2 powder dispersed in the mortar, ca. 150 times higher utilization efficiency, than that of TiO2 in traditional photocatalytic mortar (with 5% loading). ",

keywords = "Photocatalytic concrete, Supported TiO2, NOx, utilizations, environmental factors",

author = "Lu Yang and Amer Hakki and Li Zheng and Jones, {M. Roderick} and Fazhou Wang and MacPhee, {Donald E.}",

note = "The authors gratefully acknowledge funding from the UK Engineering and Physical Sciences Research Council (Grant Ref: EP/M003299/1) and the Natural Science Foundation of China (No. 51478370 and 51461135005) International Joint Research Project (EPSRC-NSFC)",

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doi = "10.1016/j.cemconres.2018.11.002",

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AU - Yang, Lu

AU - Hakki, Amer

AU - Zheng, Li

AU - Jones, M. Roderick

AU - Wang, Fazhou

AU - MacPhee, Donald E.

N1 - The authors gratefully acknowledge funding from the UK Engineering and Physical Sciences Research Council (Grant Ref: EP/M003299/1) and the Natural Science Foundation of China (No. 51478370 and 51461135005) International Joint Research Project (EPSRC-NSFC)

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N2 - The potential of TiO2-based photocatalysts in mitigating the effects of environmental pollutants is evident in the scientific literature but the large-scale implementation of photocatalytic concretes still appears limited, despite the current global concerns over urban NOx pollution. Improvements in cost effectiveness are required to enhance the case for a photocatalyst-modified infrastructure and this must address catalyst efficiency, catalyst loading and performance durability. This paper compares photocatalytic efficiencies of supported TiO2 on mortar surfaces with the more conventional TiO2 dispersed in mortar. The influences of environmental conditions, such as NO concentration and flow rate, UVA light intensity and relative humidity, on photocatalytic performance are also investigated using photonic efficiency as an indicator. The supported TiO2 shows greater degradation of NOx (De-NOx), at about 9 times higher than TiO2 powder dispersed in the mortar, ca. 150 times higher utilization efficiency, than that of TiO2 in traditional photocatalytic mortar (with 5% loading).

AB - The potential of TiO2-based photocatalysts in mitigating the effects of environmental pollutants is evident in the scientific literature but the large-scale implementation of photocatalytic concretes still appears limited, despite the current global concerns over urban NOx pollution. Improvements in cost effectiveness are required to enhance the case for a photocatalyst-modified infrastructure and this must address catalyst efficiency, catalyst loading and performance durability. This paper compares photocatalytic efficiencies of supported TiO2 on mortar surfaces with the more conventional TiO2 dispersed in mortar. The influences of environmental conditions, such as NO concentration and flow rate, UVA light intensity and relative humidity, on photocatalytic performance are also investigated using photonic efficiency as an indicator. The supported TiO2 shows greater degradation of NOx (De-NOx), at about 9 times higher than TiO2 powder dispersed in the mortar, ca. 150 times higher utilization efficiency, than that of TiO2 in traditional photocatalytic mortar (with 5% loading).

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KW - environmental factors

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