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Synthesis of thin titania coatings onto the inner surface of quartz tubes and their photoactivity in decomposition of methylene blue and rhodamine B
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Svetlov, Stanislav, Sladkovskiy, Dmitry A., Semikin, Kirill, Utemov, Alexander, Abiev, Rufat and Rebrov, Evgeny V. (2021) Synthesis of thin titania coatings onto the inner surface of quartz tubes and their photoactivity in decomposition of methylene blue and rhodamine B. Catalysts, 11 (12). 1538. doi:10.3390/catal11121538
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WRAP-synthesis-thin-titania-coatings-inner-surface-quartz-tubes-photoactivity-decomposition-methylene-blue-rhodamine-B-2021.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1350Kb) | Preview |
Official URL: https://doi.org/10.3390/catal11121538
Abstract
An evaporation-deposition coating method for coating the inner surface of long (>1 m) quartz tubes of small diameter has been studied by the introduction of two-phase (gas-liquid) flow with the gas core flowing in the middle and a thin liquid film of synthesis sol flowing near the hot tube wall. The operational window for the deposition of continuous titania coatings has been obtained. The temperature range for the deposition of continuous titania coatings is limited to 105–120 °C and the gas flow rate is limited to the range of 0.4–1.0 L min−1. The liquid flow rate in the annular flow regime allows to control the coating thickness between 3 and 10 micron and the coating porosity between 10% and 20%. By increasing the liquid flow rate, the coating porosity can be substantially reduced. The coatings were characterized by X-ray diffraction, N2 chemisorption, thermogravimetric analysis, and scanning electron microscopy. The coatings were tested in the photocatalytic decomposition of methylene blue and rhodamine B under UV-light and their activity was similar to that of a commercial P25 titania catalyst.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Titanium compounds, Catalysts , Semiconductors, Gas-liquid interfaces | ||||||
| Journal or Publication Title: | Catalysts | ||||||
| Publisher: | MDPI | ||||||
| ISSN: | 2073-4344 | ||||||
| Official Date: | 16 December 2021 | ||||||
| Dates: |
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| Volume: | 11 | ||||||
| Number: | 12 | ||||||
| Article Number: | 1538 | ||||||
| DOI: | 10.3390/catal11121538 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access | ||||||
| RIOXX Funder/Project Grant: |
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