| Autor: |
S. Mohd. Yonos Qattali, Jamal Nasir, Christian Pritzel, Torsten Kowald, Yilmaz Sakalli, S. M. Fuad Kabir Moni, Jörn Schmedt auf der Günne, Claudia Wickleder, Reinhard H. F. Trettin, Manuela S. Killian |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Construction Materials, Vol 4, Iss 2, Pp 315-328 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2673-7108 |
| DOI: |
10.3390/constrmater4020017 |
| Popis: |
One of the most significant global challenges for humans is environmental pollution. The technology to control this problem is the utilization of semiconductors as photocatalysts. In the current study, iron-doped titania nanotubes (Fe/TiNTs) with increased photocatalytic effect were synthesized via a modified hydrothermal method. The products were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy (TEM), gas adsorption, electron spin resonance (ESR) and UV–Vis diffuse reflectance spectroscopy (DRS). TEM results indicated that Fe/TiNTs have a tubular and uniform structure with an average outer diameter of 23–48 nm and length of 10–15 µm. ESR and DRS revealed that Fe3+ ions were successfully introduced into the TiNT structure by replacing Ti4+ ions. An enhanced light absorption in the range of 400–600 nm additionally indicated successful doping. The band gap was narrowed as iron wt% was increased. The photocatalytic activity was evaluated by the degradation of methyl orange (MO) in the presence of Fe/TiNTs and TiTNs by monitoring the degradation of MO under UV light irradiation. An acceleration on the hydration of Portland cement was observed in the presence of 2.0 wt% Fe/TiNTs. Fe/TiNTs can be used as a nanomaterial in cement-based building materials to provide self-cleaning properties to the surface of concrete even in indoor environments. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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