Atmospheric NOx removal: study of cement mortars with iron- and vanadium-doped TiO2 as visible light–sensitive photocatalysts
Keywords: 
Titania
Iron-doped Titania
Vanadium-doped Titania
Photocatalysis
Visible light–sensitive photocatalysts
NOx removal
Cement mortars
Issue Date: 
15-Sep-2017
Publisher: 
Elsevier
ISSN: 
0950-0618
Note: 
Creative Commons Attribution Non-Commercial No Derivatives
Citation: 
Perez-Nicolas, M. (María); Navarro-Blasco, I. (Íñigo); Fernandez, J.M. (José María); et al. "Atmospheric NOx removal: study of cement mortars with iron- and vanadium-doped TiO2 as visible light–sensitive photocatalysts". En Construction and Building Materials. 149, 2017-09-15, 257 - 271
Abstract
Mortars made with Portland cement, two different calcium aluminate cements and air lime were chosen to incorporate photocatalytic additives, because they have large exposed surfaces that boost the photochemical oxidation (PCO) of atmospheric pollutants such as nitrogen oxides. TiO2 as reference catalyst, and two doped titania, Fe-TiO2 and V-TiO2, which were expected to increase the sensitivity of the additives towards the visible light, were studied. Cementing matrices, particularly air lime and high alumina cement mortars, yielded significant amounts of NO removal under the three illumination conditions studied (UV, solar and visible light), with high selectivity response for NO abatement (up to 60 to 80%) and low NO2 release. The presence of calcium carbonate has been shown to have a synergistic effect, enhancing the PCO of these mortars under different light sources.

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