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New LED photoreactor with modulated UV–vis light source for efficient degradation of toluene over WO3/TiO2 photocatalyst
Abstract
The efficiencies of prepared WO3/TiO2 photocatalysts with varying amounts of WO3 were evaluated for gas-phase photocatalytic degradation of toluene. The obtained results revealed that the best photocatalytic properties were characteristic for samples calcined at 500ºC, which can be associated with high crystalline phase content (> 97%) and favourable BET surface area. The photocatalytic degradation tests were performed in two photoreactors equipped with different LED arrays as light sources – a flat circular reactor and a scaled-up batch photoreactor. In the first photoreactor, experiments performed under UV light (375 nm) revealed a negligible effect of WO3 content in the range of 0.1–3% mol on the photocatalytic activity. 1–hour irradiation contributed to around 99% elimination of toluene. Higher WO3 content (5% mol WO3) affected a 10% reduction in toluene removal. Furthermore, toluene degradation was performed in a scaled-up LED batch photoreactor equipped with modulated irradiation source consisting of a set of LEDs with wavelengths of 365 nm, 400 nm, and 450 nm appropriately selected for the photocatalytic material optical properties. The processes performed in a scaled-up photoreactor with a volume of 1 dm3 in the presence of a sample containing 2 mol% of WO3 showed above 80% effectiveness in toluene degradation after only 30 min of irradiation.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
CHEMICAL ENGINEERING RESEARCH & DESIGN
no. 193,
pages 145 - 157,
ISSN: 0263-8762 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Mioduska J., Łapiński M., Karczewski J., Hupka J., Zielińska-Jurek A.: New LED photoreactor with modulated UV–vis light source for efficient degradation of toluene over WO3/TiO2 photocatalyst// CHEMICAL ENGINEERING RESEARCH & DESIGN -Vol. 193, (2023), s.145-157
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.cherd.2023.03.029
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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