Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content
Iron-doped TiO<sub>2</sub> nanoparticles, ranging in Fe concentrations from 0.05 up to 1.00% w/w, were synthesized through a simple sol-gel method. Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Ultraviolet-Visible (UV-Vis) spectroscopy, nitrogen adsorpti...
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2019-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/12/11/1847 |
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| author | Chrysi Kapridaki Nikolaos Xynidis Eleftheria Vazgiouraki Nikolaos Kallithrakas-Kontos Pagona Maravelaki-Kalaitzaki |
| author_facet | Chrysi Kapridaki Nikolaos Xynidis Eleftheria Vazgiouraki Nikolaos Kallithrakas-Kontos Pagona Maravelaki-Kalaitzaki |
| author_sort | Chrysi Kapridaki |
| collection | DOAJ |
| description | Iron-doped TiO<sub>2</sub> nanoparticles, ranging in Fe concentrations from 0.05 up to 1.00% w/w, were synthesized through a simple sol-gel method. Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Ultraviolet-Visible (UV-Vis) spectroscopy, nitrogen adsorption−desorption isotherms, X-ray photoelectron spectroscopy (XPS), and X-ray absorption near-edge structure spectroscopy (XANES) were used to characterize the synthesized nanoparticles. The characterization of the Fe-doped TiO<sub>2</sub> nanoparticles revealed the predominant presence of anatase crystalline form, as well as the incorporation of the Fe<sup>3+</sup> ions into the crystal lattice of TiO<sub>2</sub>. The photocatalytic assessment of the Fe-doped TiO<sub>2</sub> nanoparticles indicated that the low iron doping titania (0.05 and 0.10% w/w) have a positive effect on the photocatalytic degradation of Methyl Orange under visible radiation. Moreover, FTIR monitoring of calcium hydroxide pastes enriched with low Fe-doped TiO<sub>2</sub> revealed enhancement of carbonation at both early and later stages. Improved photocatalytic performance and increased lime carbonation, observed in lime coatings with low Fe-doped TiO<sub>2</sub> admixtures, established them as invaluable contributors to the protection of the built environment. |
| first_indexed | 2024-04-12T20:23:52Z |
| format | Article |
| id | doaj.art-36a105c3d8de440aa81cf3ea92eb0768 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-12T20:23:52Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-36a105c3d8de440aa81cf3ea92eb07682022-12-22T03:17:55ZengMDPI AGMaterials1996-19442019-06-011211184710.3390/ma12111847ma12111847Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron ContentChrysi Kapridaki0Nikolaos Xynidis1Eleftheria Vazgiouraki2Nikolaos Kallithrakas-Kontos3Pagona Maravelaki-Kalaitzaki4School of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, GreeceSchool of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, GreeceSchool of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, GreeceSchool of Mineral Resources Engineering, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, GreeceSchool of Architecture, Technical University of Crete, Polytechnioupolis, Akrotiri, 73100 Chania, Crete, GreeceIron-doped TiO<sub>2</sub> nanoparticles, ranging in Fe concentrations from 0.05 up to 1.00% w/w, were synthesized through a simple sol-gel method. Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Ultraviolet-Visible (UV-Vis) spectroscopy, nitrogen adsorption−desorption isotherms, X-ray photoelectron spectroscopy (XPS), and X-ray absorption near-edge structure spectroscopy (XANES) were used to characterize the synthesized nanoparticles. The characterization of the Fe-doped TiO<sub>2</sub> nanoparticles revealed the predominant presence of anatase crystalline form, as well as the incorporation of the Fe<sup>3+</sup> ions into the crystal lattice of TiO<sub>2</sub>. The photocatalytic assessment of the Fe-doped TiO<sub>2</sub> nanoparticles indicated that the low iron doping titania (0.05 and 0.10% w/w) have a positive effect on the photocatalytic degradation of Methyl Orange under visible radiation. Moreover, FTIR monitoring of calcium hydroxide pastes enriched with low Fe-doped TiO<sub>2</sub> revealed enhancement of carbonation at both early and later stages. Improved photocatalytic performance and increased lime carbonation, observed in lime coatings with low Fe-doped TiO<sub>2</sub> admixtures, established them as invaluable contributors to the protection of the built environment.https://www.mdpi.com/1996-1944/12/11/1847TiO<sub>2</sub>Fe-doped TiO<sub>2</sub>photocatalytic activityFe contentvisible lightlime and Fe-TiO<sub>2</sub> coatingself-cleaningcarbonation |
| spellingShingle | Chrysi Kapridaki Nikolaos Xynidis Eleftheria Vazgiouraki Nikolaos Kallithrakas-Kontos Pagona Maravelaki-Kalaitzaki Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content Materials TiO<sub>2</sub> Fe-doped TiO<sub>2</sub> photocatalytic activity Fe content visible light lime and Fe-TiO<sub>2</sub> coating self-cleaning carbonation |
| title | Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content |
| title_full | Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content |
| title_fullStr | Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content |
| title_full_unstemmed | Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content |
| title_short | Characterization of Photoactive Fe-TiO<sub>2</sub> Lime Coatings for Building Protection: The Role of Iron Content |
| title_sort | characterization of photoactive fe tio sub 2 sub lime coatings for building protection the role of iron content |
| topic | TiO<sub>2</sub> Fe-doped TiO<sub>2</sub> photocatalytic activity Fe content visible light lime and Fe-TiO<sub>2</sub> coating self-cleaning carbonation |
| url | https://www.mdpi.com/1996-1944/12/11/1847 |
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