Characterization of Photoactive Fe-TiO2 Lime Coatings for Building Protection: The Role of Iron Content
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of Fe-TiO2 Nanoparticles and Pastes with Air Lime and Fe-TiO2
2.2. Characterization of the Photoactive Fe-doped TiO2 Nanoparticles
2.3. Assessment of the Photocatalytic Activity of the Photoactive Nanoparticles
2.4. Evaluation of the Carbonation Process and Photocatalytic Performance of the Photoactive Fe-TiO2 Lime Pastes
3. Results and Discussion
3.1. Characterization of the Photoactive Fe-doped TiO2 Nanoparticles with FTIR, XRD, BET, UV-Vis, and XPS
3.2. XANES Analysis of Samples
3.3. Photocatalytic Activity of the Fe-doped TiO2 Nanoparticles
3.4. Assessment of the Carbonation Process and the Self-Cleaning Properties of the Lime Pastes
4. Conclusions
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Fe-TiO2 (T) Synthesized Nanoparticles | Pastes of Lime (L) and Fe-TiO2 Nanoparticles (3% w/w) |
---|---|
- | Lime (Blank) |
0.00FeT | L0.00FeT |
0.05FeT | L0.05FeT |
0.10FeT | L0.10FeT |
0.20FeT | L0.20FeT |
0.70FeT | L0.70FeT |
1.00FeT | L1.00FeT |
TiO2 Nanoparticles | % Anatase | % Brookite | Crystallite Size of Anatase (nm) | Surface Area (m2 g−1) | Band Gap (eV) |
---|---|---|---|---|---|
0.00FeT | 100 | - | 20.4 | 52 | 3.13 |
0.05FeT | 98 | 2 | 12.9 | 65 | 3.06 |
0.10FeT | 98 | 2 | 13.1 | 76 | 2.95 |
0.20FeT | 97 | 3 | 11.5 | n.a. | 2.95 |
0.70FeT | 96 | 4 | 12.6 | n.a. | 2.64 |
1.00FeT | 92 | 8 | 12.5 | 59 | 2.61 |
Sample | k (10−3 min−1) | r2 | % Dis. (30 min) * | % Dis. (90 min) * |
---|---|---|---|---|
Blank | 0.7 | 0.97 | 3 | 5 |
0.00FeT | 39 | 0.98 | 66 | 98 |
0.05FeT | 44 | 0.98 | 71 | 98 |
0.10FeT | 58 | 0.96 | 94 | 100 |
0.20FeT | 33 | 0.97 | 51 | 100 |
0.70FeT | 8 | 0.98 | 16 | 69 |
1.00FeT | 5 | 0.99 | 15 | 36 |
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Kapridaki, C.; Xynidis, N.; Vazgiouraki, E.; Kallithrakas-Kontos, N.; Maravelaki-Kalaitzaki, P. Characterization of Photoactive Fe-TiO2 Lime Coatings for Building Protection: The Role of Iron Content. Materials 2019, 12, 1847. https://doi.org/10.3390/ma12111847
Kapridaki C, Xynidis N, Vazgiouraki E, Kallithrakas-Kontos N, Maravelaki-Kalaitzaki P. Characterization of Photoactive Fe-TiO2 Lime Coatings for Building Protection: The Role of Iron Content. Materials. 2019; 12(11):1847. https://doi.org/10.3390/ma12111847
Chicago/Turabian StyleKapridaki, Chrysi, Nikolaos Xynidis, Eleftheria Vazgiouraki, Nikolaos Kallithrakas-Kontos, and Pagona Maravelaki-Kalaitzaki. 2019. "Characterization of Photoactive Fe-TiO2 Lime Coatings for Building Protection: The Role of Iron Content" Materials 12, no. 11: 1847. https://doi.org/10.3390/ma12111847