Correlation between the photocatalysed oxidation of methylene blue in solution and the reduction of resazurin in a photocatalyst activity indicator ink (Rz Paii )
| Autor: | Nathan Wells, Christopher O’Rourke, Andrew Mills |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering General Physics and Astronomy Resazurin 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Magazine law Photocatalysis Organic chemistry Linear correlation 0210 nano-technology Photocatalyst activity indicator ink Methylene blue Nuclear chemistry Initial rate |
| Zdroj: | Mills, A, Wells, N & O'Rourke, C 2016, ' Correlation between the photocatalysed oxidation of methylene blue in solution and the reduction of resazurin in a photocatalyst activity indicator ink (Rz Paii) ', Journal of Photochemistry and Photobiology A: Chemistry, vol. 330, pp. 86-89 . https://doi.org/10.1016/j.jphotochem.2016.07.020 |
| ISSN: | 1010-6030 |
| Popis: | The initial rate of the photocatalysed oxidation of methylene blue, MB, by dissolved oxygen in solution, ri(MB), is measured for a series of titania on glass samples exhibiting a wide range of activities. The samples used include two different types of commercial self-cleaning glass and a lab-made sol-geltitania film. The activities of these samples are also assessed using a resazurin-based photocatalyst activity indicator ink, i.e. Rz paii, for which the initial rates of the photocatalysed reduction of Rz were measured, ri(Rz). A plot of ri(MB)vs. ri(Rz) reveals a goodstraight line, thereby demonstrating a linear correlation (for TiO2films on glass at least) between the slow (usually hours) photocatalysed oxidation of organic materials, such as MB, and the fast (typically minutes) photocatalysed irreversible reduction of a dye, like Rz, in a paii. The possible use of paii technology for assessing, in a simple, quick and inexpensive manner, photocatalytic films both in the laboratory and in situ is discussed briefly. |
| Databáze: | OpenAIRE |
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