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Rhodamine B discolouration on TiO2 in the cement environment: A look at fundamental aspects of the self-cleaning effect in concretes

Folli, A., Jakobsen, U. H., Guerrini, G. L. and Macphee, D. E. 2009. Rhodamine B discolouration on TiO2 in the cement environment: A look at fundamental aspects of the self-cleaning effect in concretes. Journal of Advanced Oxidation Technologies 12 (1) , pp. 126-133. 10.1515/jaots-2009-0116

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Abstract

The present work addresses the photocatalytic properties of two commercial titanias for application in concrete technology. 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) have been tested. Cement paste samples (CEMI 52.5 cement, w/c=0.4) containing both photocatalysts have been evaluated based on Rhodamine B (RhB) discolouration under U.V. light, a standard test for self-cleaning cementitious materials. Experimental data are discussed in relation to photocatalyst properties (e.g.: particle size), dye adsorption and degradation characteristics. The influence of the chemical environment on photocatalyst performance and its impact on applications in construction concrete are also discussed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
ISSN: 2371-1175
Date of Acceptance: 18 December 2008
Last Modified: 28 Jan 2020 09:30
URI: http://orca.cf.ac.uk/id/eprint/129043

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