Repozytorium publikacji - Politechnika Gdańska

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.

Autorzy

• dr inż. Joanna Mioduska link otwiera się w nowej karcie ,
• dr inż. Marcin Łapiński link otwiera się w nowej karcie ,
• dr hab. inż. Jakub Karczewski link otwiera się w nowej karcie ,
• prof. dr hab. inż. Jan Hupka link otwiera się w nowej karcie ,
• prof. dr hab. inż. Anna Zielińska-Jurek link otwiera się w nowej karcie