Preparation of a self-cleaning glass using solutions of titanium fluor complexes
DOI:
https://doi.org/10.15587/2312-8372.2019.181546Keywords:
silicate glass, nanostructured coatings, self-cleaning coating, (NH4)2TiF6, X-ray phase analysis, bifluoride methodAbstract
The object of research is silicate glass with a nanostructured coating of titanium oxide (in the anatase modification), which is noted for photocatalytic activity and, as a result, acquires the ability to self-clean under ultraviolet irradiation. The existing industrial method of applying such a coating is carried out by the pyrolytic method, but it is effective for large-scale production, and is carried out for large-sized products from sheet float glass. For the production of small-scale, or piece products, it is not justified. This applies to products of complex configuration, and especially hollow. In the case there are methods of coating from the liquid phase. First of all, the sol-gel method. The classical such method requires titanium alkoxides, which are of high cost, as precursors.
Cheaper and more flexible is the method of coating from solutions of titanium fluorine complex compounds. Ammonium hexafluorotitanate is used as a precursor, but it is expensive. It is proposed to modify the chain of chemical transformations, namely: to use the cheaper and more affordable ones as primary precursors. It is proposed to obtain it artificially, using the bifluoride method.
During the study, ammonium bifluoride NH4HF2 and titanium oxide TiO2 are used, which, according to the proposed synthesis method, form (NH4)2TiF6, its appearance is confirmed by X-ray phase analysis.
Fluorination of titanium oxide Ammonium bifluoride occurred at a temperature not exceeding 200 °C. Fluorination is accompanied by the release of only water vapor and ammonia.
A photocatalytic coating is obtained on float glass samples by precipitation of the anatase crystalline phase from an aqueous solution of (NH4)2TiF6. The presence of anatase is confirmed by X-ray phase analysis. The size of crystalline formations does not exceed 15-20 nm. The self-cleaning ability is evaluated by the hydrophilicity test of the glass and the spectral characteristics of the coating in the ultraviolet range.
Due to this, it is possible to obtain a self-cleaning coating on glass, which, in comparison with similar known ones, is not inferior in quality and has the following advantages: low cost and availability, absence of harmful emissions, complies with the principles of «green chemistry».
References
- Minella, M., Minero, C. (2019). Quantification of the Photocatalytic Self-Cleaning Ability of Non-Transparent Materials. Materials, 12 (3), 508. doi: http://doi.org/10.3390/ma12030508
- Midtdal, K., Jelle, B. P. (2013). Self-cleaning glazing products: A state-of-the-art review and future research pathways. Solar Energy Materials and Solar Cells, 109, 126–141. doi: http://doi.org/10.1016/j.solmat.2012.09.034
- Schneider, J., Matsuoka, M., Takeuchi, M., Zhang, J., Horiuchi, Y., Anpo, M., Bahnemann, D. W. (2014). Understanding TiO2 Photocatalysis: Mechanisms and Materials. Chemical Reviews, 114 (19), 9919–9986. doi: http://doi.org/10.1021/cr5001892
- Landmann, M., Rauls, E., Schmidt, W. G. (2012). The electronic structure and optical response of rutile, anatase and brookite TiO2. Journal of Physics: Condensed Matter, 24 (19), 195503. doi: http://doi.org/10.1088/0953-8984/24/19/195503
- Karunagaran, B., Uthirakumar, P., Chung, S. J., Velumani, S., Suh, E.-K. (2007). TiO2 thin film gas sensor for monitoring ammonia. Materials Characterization, 58 (8-9), 680–684. doi: http://doi.org/10.1016/j.matchar.2006.11.007
- Pan, J., Leygraf, C., Thierry, D., Ektessabi, A. M. (1997). Corrosion resistance for biomaterial applications of TiO2 films deposited on titanium and stainless steel by ion-beam-assisted sputtering. Journal of Biomedical Materials Research, 35 (3), 309–318. doi: http://doi.org/10.1002/(sici)1097-4636(19970605)35:3<309::aid-jbm5>3.0.co;2-l
- Wu, J.-J., Yu, C.-C. (2004). Aligned TiO2Nanorods and Nanowalls. The Journal of Physical Chemistry B, 108 (11), 3377–3379. doi: http://doi.org/10.1021/jp0361935
- Wu, J.-M., Shih, H. C., Wu, W.-T., Tseng, Y.-K., Chen, I.-C. (2005). Thermal evaporation growth and the luminescence property of TiO2 nanowires. Journal of Crystal Growth, 281 (2-4), 384–390. doi: http://doi.org/10.1016/j.jcrysgro.2005.04.018
- Chen, X., Mao, S. S. (2007). Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications. Chemical Reviews, 107 (7), 2891–2959. doi: http://doi.org/10.1021/cr0500535
- Chiarello, G. L., Selli, E., Forni, L. (2008). Photocatalytic hydrogen production over flame spray pyrolysis-synthesised TiO2 and Au/TiO2. Applied Catalysis B: Environmental, 84 (1-2), 332–339. doi: http://doi.org/10.1016/j.apcatb.2008.04.012
- Šćepanović, M., Dohčević-Mitrović, Z., Hinić, I., Grujić-Brojčin, M., Stanišić, G., Popović, Z. V. (2005). Photoluminescence of Laser-Synthesized Anatase Titanium Dioxide Nanopowders. Materials Science Forum, 494, 265–270. doi: http://doi.org/10.4028/www.scientific.net/msf.494.265
- Seifried, S., Winterer, M., Hahn, H. (2000). Nanocrystalline Titania Films and Particles by Chemical Vapor Synthesis. Chemical Vapor Deposition, 6 (5), 239–244. doi: http://doi.org/10.1002/1521-3862(200010)6:5<239::aid-cvde239>3.3.co;2-h
- Wu, J.-M., Shih, H. C., Wu, W.-T., Tseng, Y.-K., Chen, I.-C. (2005). Thermal evaporation growth and the luminescence property of TiO2 nanowires. Journal of Crystal Growth, 281 (2-4), 384–390. doi: http://doi.org/10.1016/j.jcrysgro.2005.04.018
- Cheng, H., Ma, J., Zhao, Z., Qi, L. (1995). Hydrothermal Preparation of Uniform Nanosize Rutile and Anatase Particles. Chemistry of Materials, 7 (4), 663–671. doi: http://doi.org/10.1021/cm00052a010
- Li, X.-L., Peng, Q., Yi, J.-X., Wang, X., Li, Y. (2006). Near Monodisperse TiO2 Nanoparticles and Nanorods. Chemistry – A European Journal, 12 (8), 2383–2391. doi: http://doi.org/10.1002/chem.200500893
- Estekhraji, S. A. Z., Amiri, S. (2017). Sol–gel preparation and characterization of antibacterial and self-cleaning hybrid nanocomposite coatings. Journal of Coatings Technology and Research, 14 (6), 1335–1343. doi: http://doi.org/10.1007/s11998-017-9932-7
- Maver, K., Štangar, U. L., Černigoj, U., Gross, S., Cerc Korošec, R. (2009). Low-temperature synthesis and characterization of TiO2 and TiO2–ZrO2 photocatalytically active thin films. Photochemical & Photobiological Sciences, 8 (5), 657–662. doi: http://doi.org/10.1039/b817475j
- Han, S., Choi, S.-H., Kim, S.-S., Cho, M., Jang, B., Kim, D.-Y. et. al. (2005). Low-Temperature Synthesis of Highly Crystalline TiO2 Nanocrystals and their Application to Photocatalysis. Small, 1 (8-9), 812–816. doi: http://doi.org/10.1002/smll.200400142
- Jelle, B. P., Hynd, A., Gustavsen, A., Arasteh, D., Goudey, H., Hart, R. (2012). Fenestration of today and tomorrow: A state-of-the-art review and future research opportunities. Solar Energy Materials and Solar Cells, 96, 1–28. doi: http://doi.org/10.1016/j.solmat.2011.08.010
- Gläser, H. J., Ulrich, S. (2013). Condensation on the outdoor surface of window glazing – Calculation methods, key parameters and prevention with low-emissivity coatings. Thin Solid Films, 532, 127–131. doi: http://doi.org/10.1016/j.tsf.2012.12.110
- Deki, S., Aoi, Y., Hiroi, O., Kajinami, A. (1996). Titanium (IV) Oxide Thin Films Prepared from Aqueous Solution. Chemistry Letters, 25 (6), 433–434. doi: http://doi.org/10.1246/cl.1996.433
- Deki, S., Aoi, Y., Asaoka, Y., Kajinami, A., Mizuhata, M. (1997). Monitoring the growth of titanium oxide thin films by the liquid-phase deposition method with a quartz crystal microbalance. Journal of Materials Chemistry, 7 (5), 733–736. doi: http://doi.org/10.1039/a607466i
- Gutiérrez-Tauste, D., Domènech, X., Angeles Hernández-Fenollosa, M., Ayllón, J. A. (2006). Alternative fluoride scavengers to produce TiO2films by the liquid phase deposition (LPD) technique. J. Mater. Chem., 16 (23), 2249–2255. doi: http://doi.org/10.1039/b515367k
- Masuda, Y., Sugiyama, T., Seo, W. S., Koumoto, K. (2003). Deposition Mechanism of Anatase TiO2on Self-Assembled Monolayers from an Aqueous Solution. Chemistry of Materials, 15 (12), 2469–2476. doi: http://doi.org/10.1021/cm030255m
- Niesen, T. P., De Guire, M. R. (2002). Review: deposition of ceramic thin films at low temperatures from aqueous solutions. Solid State Ionics, 151, 61–68. doi: http://doi.org/10.1016/s0167-2738(02)00604-5
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