Production and testing of novel photocatalytic TiO2 surface-exposed nanoparticle (TiO2-SEN) thin plastic films
| Autor: | Andrew Mills, Steven E. J. Bell, Xinyuan Li, Yikai Xu, Aaron McNeill, Nathan Wells |
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| Rok vydání: | 2019 |
| Předmět: |
Tetraphenylborate
Chemistry Scanning electron microscope General Chemical Engineering General Physics and Astronomy Nanoparticle 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Coating Chemical engineering Phase (matter) Monolayer Photocatalysis engineering Polystyrene 0210 nano-technology |
| Zdroj: | McNeill, A, Wells, N, Xu, Y, Li, X, Bell, S E J & Mills, A 2019, ' Production and testing of novel photocatalytic TiO2 surface-exposed nanoparticle (TiO2-SEN) thin plastic films ', Journal of Photochemistry and Photobiology A: Chemistry, vol. 369, pp. 142-149 . https://doi.org/10.1016/j.jphotochem.2018.10.025 |
| ISSN: | 1010-6030 |
| Popis: | Thin, flexible, surface-active, polystyrene-based, optically transparent films, embedded with a coating of commercially sourced titanium dioxide nanoparticles (Evonik P25), are made by coupling protonated TiO2 particles with an anionic phase transfer agent (tetraphenylborate), to create an ion-paired species that is drawn to a water/dichloromethane (DCM) interface to form a monolayer. The latter is subsequently embedded in a thin polystyrene (PS) film, typically 2.5 μm thick, by allowing the DCM to evaporate. The resulting clear TiO2 Surface-Exposed Nanoparticle (TiO2-SEN) thin plastic films are characterised using scanning electron microscopy (SEM) and found to have 25.3 ± 5.4 nm TiO2 nanoparticles exposed to the air on one side and PS on the other. The photocatalytic activity of these films is demonstrated using a number of different tests including: the photo-oxidation of 4-chlorophenol (4-CP) and methylene blue (MB) and the photoreduction of resazurin (Rz) and MB. In most of these tests the photoactivity of the film is more than double compared to that of a commercial photocatalytic film, Activ™. |
| Databáze: | OpenAIRE |
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