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Khasevani, Sepideh G.
Publications (2 of 2) Show all publications
Khasevani, S. G., Nikjoo, D., Chaxel, C., Umeki, K., Sarmad, S., Mikkola, J.-P. & Concina, I. (2023). Empowering Adsorption and Photocatalytic Degradation of Ciprofloxacin on BiOI Composites: A Material-by-Design Investigation. ACS Omega, 8(46), 44044-44056
Open this publication in new window or tab >>Empowering Adsorption and Photocatalytic Degradation of Ciprofloxacin on BiOI Composites: A Material-by-Design Investigation
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2023 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 8, no 46, p. 44044-44056Article in journal (Refereed) Published
Abstract [en]

Binary and ternary composites of BiOI with NH2-MIL-101(Fe) and a functionalized biochar were synthesized through an in situ approach, aimed at spurring the activity of the semiconductor as a photocatalyst for the removal of ciprofloxacin (CIP) from water. Experimental outcomes showed a drastic enhancement of the adsorption and the equilibrium (which increased from 39.31 mg g–1 of bare BiOI to 76.39 mg g–1 of the best ternary composite in 2 h time), while the kinetics of the process was not significantly changed. The photocatalytic performance was also significantly enhanced, and the complete removal of 10 ppm of CIP in 3 h reaction time was recorded under simulated solar light irradiation for the best catalyst of the investigated batch. Catalytic reactions supported by different materials obeyed different reaction orders, indicating the existence of different mechanisms. The use of scavengers for superoxide anion radicals, holes, and hydroxyl radicals showed that although all these species are involved in CIP photodegradation, the latter play the most crucial role, as also confirmed by carrying out the reaction at increasing pH conditions. A clear correlation between the reduction of BiOI crystallite sizes in the composites, as compared to the bare material, and the material performance as both adsorbers and photocatalyst was identified. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
National Category
Physical Chemistry Materials Chemistry
Research subject
Energy Engineering; Experimental Physics; Waste Science and Technology
Identifiers
urn:nbn:se:ltu:diva-103204 (URN)10.1021/acsomega.3c06243 (DOI)001108005100001 ()2-s2.0-85178352921 (Scopus ID)
Funder
The Kempe Foundations, SMK-1974Knut and Alice Wallenberg FoundationBio4Energy
Note

Validerad;2023;Nivå 2;2023-12-11 (joosat);

License full text: CC BY

Available from: 2023-12-11 Created: 2023-12-11 Last updated: 2024-03-07Bibliographically approved
Khasevani, S. G., Nikjoo, D., Ojwang, D. O., Nodari, L., Sarmad, S., Mikkola, J.-P., . . . Concina, I. (2022). The beauty of being complex: Prussian blue analogues as selective catalysts and photocatalysts in the degradation of ciprofloxacin. Journal of Catalysis, 410, 307-319
Open this publication in new window or tab >>The beauty of being complex: Prussian blue analogues as selective catalysts and photocatalysts in the degradation of ciprofloxacin
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2022 (English)In: Journal of Catalysis, ISSN 0021-9517, E-ISSN 1090-2694, Vol. 410, p. 307-319Article in journal (Refereed) Published
Abstract [en]

We investigate the performance of four Prussian blue analogues (PBAs) as catalysts for the selective degradation of ciprofloxacin in water, under both dark and illumination conditions. We show that no light is actually needed to induce a selective degradation of the molecular target, while light irradiation spurs the process, without, however, resulting in the commonly reported photolysis-supported breaking down. We present a systematic characterization of the PBAs aiming at interpreting the catalytic outcomes in the light of a classic coordination chemistry analysis, empowered by the most recent findings in literature. We show that varying the transition metal binding the N atom of the cyanide bridge is key to promote photoinduced charge generation and transfer, which effectively disrupts the molecular target. The analysis of the materials before and after the irradiation with solar simulated light results in a change of the lattice parameters, indicating the possibility of a light-induced spin cross-over.

Place, publisher, year, edition, pages
Elsevier, 2022
Keywords
Prussian blue analogues, Ciprofloxacin degradation, Photocatalysis, Auto-catalytic reactions, Mössbauer spectroscopy
National Category
Materials Chemistry Physical Chemistry
Research subject
Engineering Materials; Experimental Physics
Identifiers
urn:nbn:se:ltu:diva-90488 (URN)10.1016/j.jcat.2022.04.029 (DOI)000799277700002 ()2-s2.0-85129740965 (Scopus ID)
Funder
The Kempe Foundations, (SMK-1947)ÅForsk (Ångpanneföreningen's Foundation for Research and Development), (18-459)Swedish Energy Agency, (45517-1)
Note

Validerad;2022;Nivå 2;2022-05-11 (sofila)

Available from: 2022-05-02 Created: 2022-05-02 Last updated: 2022-06-20Bibliographically approved
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