In this work, the effect of various ionic liquids (ILs), namely, choline chloride [Chol][Cl], hexadecylpyridynium chloride [HDPy][Cl], and tributylmethylammonium chloride [TBMA][Cl], on the morphology, surface compo-sition in relation to photocatalytic oxidation of 5-fluorouracil (5-FU) and phenol in the presence of TiO2 pho-tocatalysts under artificial sunlight conditions was investigated. The highest photoactivity towards cytostatic drug removal was found when [TBMA][Cl] was used for the synthesis, for phenol removal photoactivity was not changed in all cases. Among the selected ionic liquids, only [TMBA][Cl] made it possible to form the Ti3+species, which was equivalent to the occurrence of oxygen vacancies and was beneficial for the photocatalytic activity. Moreover, the increase of ILs-TiO2 photoactivity was assigned to the presence of IL or IL’s organic residues on the photocatalyst surface responsible for better hole and electron separation. The mechanism of 5-FU degradation over the most photoactive photocatalyst was varied under different types of light irradiation, and •OHfree radicals were the major entities in the drug removal under UV light, while holes and •OH free radicals under solar light. These studies represent a promising approach to cytostatic drug removal in the presence of TiO2 microspheres prepared in the presence of others than imidazolium-based ILs.
Authors
- Patrycja Wilczewska,
- Anna Pancielejko link open in new tab ,
- dr hab. inż. Justyna Łuczak link open in new tab ,
- Malwina Kroczewska link open in new tab ,
- dr hab. Wojciech Lisowski,
- Ewa Siedlecka
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.apsusc.2021.151431
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2022
