Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 144, Issue -, Pages 300-310Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.03.146
Keywords
Color; Pigment; Iron; Cement; Mortar; Photocatalytic activity
Categories
Funding
- CSIC
- LIFE program's [LIFE PHOTOSCALING-LIFE13 ENV/ES/001221]
Ask authors/readers for more resources
This paper analyses the effect of adding iron based pigments to produce photocatalytic colored mortars (Ph-CM) evaluating nitrogen oxide air purification-NOx, Rhodamine B self-cleaning-RhB and formation rate of hydroxyl radicals-OH. All Ph-CM tested shifted towards lower energy values with respect to the absorption-edge of the TiO2-mortar samples without pigments. However, different UV-Visible photoactivity behavior was obtained in function of the type and content of pigment. The results indicate that even though a decrease in the photocatalytic efficiency can occur, in some cases, an interfacial electron transfer between the conduction band of iron pigment and the photocatalytic mortar could also take place, resulting in an effective inhibition of electron-hole recombination, higher formation rate of OH, and thereby higher photocatalytic activity. This electron transfer ability directly depends on the band edge position of pigment-cement heteroestructure and the iron to pigment ratio. (C) 2017 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available