TiO2 photocatalysis in cementitious systems: insights into self-cleaning and depollution chemistry

Andrea Folli; Claus Pade; Tommy Baek Hansen; Tiziana De Marco; Donald E. Macphee

doi:10.1016/j.cemconres.2011.12.001

TiO2 photocatalysis in cementitious systems: insights into self-cleaning and depollution chemistry

Andrea Folli, Claus Pade, Tommy Baek Hansen, Tiziana De Marco, Donald E. Macphee

Chemistry

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

223 Citations (Scopus)

Abstract

The present work offers a general overview about application of titanium dioxide (or titania), TiO2, photocatalysis to concrete technology in relation to enhanced aesthetic durability and depollution properties achieved by implementing TiO2 into cement. Chemistry of degradation of Rhodamine B (RhB), a red dye used to assess self-cleaning performances of concretes containing TiO2, as well as oxidation of nitrogen oxides (NOx), gaseous atmospheric pollutants responsible for acid rains and photochemical smog, is investigated using two commercial titania samples in cement and mortar specimens: a microsized, m-TiO2 (average particle size 153.7 nm +/- 48.1 nm) and a nanosized, n-TiO2 (average particle size 18.4 nm +/- 5.0 nm). Experimental data on photocatalytic performances measured for the two samples are discussed in relation to photocatalyst properties and influence of the chemical environment of cement on titania particles. Impacts on applications in construction concrete are also discussed. (C) 2011 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	539-548
Number of pages	10
Journal	Cement and Concrete Research
Volume	42
Issue number	3
Early online date	11 Jan 2012
DOIs	https://doi.org/10.1016/j.cemconres.2011.12.001
Publication status	Published - Mar 2012

Keywords

TiO2 photocatalysis
self-cleaning
aesthetic durability
depollution
particle size
visible-light irradiation
rhodamine-B
oxidation
dispersions
degradation
purification
adsorption
electrode
layers
gases

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title = "TiO2 photocatalysis in cementitious systems: insights into self-cleaning and depollution chemistry",

abstract = "The present work offers a general overview about application of titanium dioxide (or titania), TiO2, photocatalysis to concrete technology in relation to enhanced aesthetic durability and depollution properties achieved by implementing TiO2 into cement. Chemistry of degradation of Rhodamine B (RhB), a red dye used to assess self-cleaning performances of concretes containing TiO2, as well as oxidation of nitrogen oxides (NOx), gaseous atmospheric pollutants responsible for acid rains and photochemical smog, is investigated using two commercial titania samples in cement and mortar specimens: a microsized, m-TiO2 (average particle size 153.7 nm +/- 48.1 nm) and a nanosized, n-TiO2 (average particle size 18.4 nm +/- 5.0 nm). Experimental data on photocatalytic performances measured for the two samples are discussed in relation to photocatalyst properties and influence of the chemical environment of cement on titania particles. Impacts on applications in construction concrete are also discussed. (C) 2011 Elsevier Ltd. All rights reserved.",

keywords = "TiO2 photocatalysis, self-cleaning, aesthetic durability, depollution, particle size, visible-light irradiation, rhodamine-B, oxidation, dispersions, degradation, purification, adsorption, electrode, layers, gases",

author = "Andrea Folli and Claus Pade and Hansen, {Tommy Baek} and {De Marco}, Tiziana and Macphee, {Donald E.}",

note = "Acknowledgement The authors are grateful to the European Community under the Marie Curie Research Training Network MRTN-CT-2005-019283 “Fundamental understanding of cementitious materials for improved chemical physical and aesthetic performance” (http://www.nanocem.org/MC-RTN/) for the full support of Andrea Folli.",

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doi = "10.1016/j.cemconres.2011.12.001",

language = "English",

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pages = "539--548",

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T2 - insights into self-cleaning and depollution chemistry

AU - Folli, Andrea

AU - Pade, Claus

AU - Hansen, Tommy Baek

AU - De Marco, Tiziana

AU - Macphee, Donald E.

N1 - Acknowledgement The authors are grateful to the European Community under the Marie Curie Research Training Network MRTN-CT-2005-019283 “Fundamental understanding of cementitious materials for improved chemical physical and aesthetic performance” (http://www.nanocem.org/MC-RTN/) for the full support of Andrea Folli.

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N2 - The present work offers a general overview about application of titanium dioxide (or titania), TiO2, photocatalysis to concrete technology in relation to enhanced aesthetic durability and depollution properties achieved by implementing TiO2 into cement. Chemistry of degradation of Rhodamine B (RhB), a red dye used to assess self-cleaning performances of concretes containing TiO2, as well as oxidation of nitrogen oxides (NOx), gaseous atmospheric pollutants responsible for acid rains and photochemical smog, is investigated using two commercial titania samples in cement and mortar specimens: a microsized, m-TiO2 (average particle size 153.7 nm +/- 48.1 nm) and a nanosized, n-TiO2 (average particle size 18.4 nm +/- 5.0 nm). Experimental data on photocatalytic performances measured for the two samples are discussed in relation to photocatalyst properties and influence of the chemical environment of cement on titania particles. Impacts on applications in construction concrete are also discussed. (C) 2011 Elsevier Ltd. All rights reserved.

AB - The present work offers a general overview about application of titanium dioxide (or titania), TiO2, photocatalysis to concrete technology in relation to enhanced aesthetic durability and depollution properties achieved by implementing TiO2 into cement. Chemistry of degradation of Rhodamine B (RhB), a red dye used to assess self-cleaning performances of concretes containing TiO2, as well as oxidation of nitrogen oxides (NOx), gaseous atmospheric pollutants responsible for acid rains and photochemical smog, is investigated using two commercial titania samples in cement and mortar specimens: a microsized, m-TiO2 (average particle size 153.7 nm +/- 48.1 nm) and a nanosized, n-TiO2 (average particle size 18.4 nm +/- 5.0 nm). Experimental data on photocatalytic performances measured for the two samples are discussed in relation to photocatalyst properties and influence of the chemical environment of cement on titania particles. Impacts on applications in construction concrete are also discussed. (C) 2011 Elsevier Ltd. All rights reserved.

KW - TiO2 photocatalysis

KW - self-cleaning

KW - aesthetic durability

KW - depollution

KW - particle size

KW - visible-light irradiation

KW - rhodamine-B

KW - oxidation

KW - dispersions

KW - degradation

KW - purification

KW - adsorption

KW - electrode

KW - layers

KW - gases

U2 - 10.1016/j.cemconres.2011.12.001

DO - 10.1016/j.cemconres.2011.12.001

M3 - Article

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JO - Cement and Concrete Research

JF - Cement and Concrete Research

SN - 0008-8846

IS - 3

ER -

TiO2 photocatalysis in cementitious systems: insights into self-cleaning and depollution chemistry

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Keywords

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