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Fast and efficient piezo-photocatalytic mineralization of ibuprofen by BiOBr nanosheets under solar light irradiation

Ermelinda Falletta, Melissa Greta Galloni, Nikoletta Mila, Muhammad N. bin Roslan, Noraini Abd Ghani, Giuseppina Cerrato, Alessia Giordana, Mirko Magni, Silvia Maria Spriano, Daria Camilla Boffito and Claudia L. Bianchi

Article (2023)

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Abstract

In the present work, the piezoelectric-like behavior of BiOBr nanosheets was utilized to suppress the recombination of photoexcited charges. The piezo-photocatalytic properties of an easily synthesized photocatalyst were tested for the degradation of ibuprofen, a nonsteroidal anti-inflammatory drug. Under ultrasound and solar light irradiation, the reaction rate for ibuprofen mineralization was found to be higher in the BiOBr nanosheets compared with those from the individual photocatalysis and piezocatalysis approaches, respectively. A percentage of synergy higher than 60% was calculated, resulting in the achievement of complete mineralization in less than 30 min. Based on the results, a possible piezo-photocatalytic mechanism, based on the separation of photoinduced charges and the formation of highly active radicals, has been proposed. Furthermore, various scavengers were used to identify the active species by trapping holes and radicals generated during the piezo-photocatalytic degradation process. The main transformation products formed during both photo- and piezo-photodegradation processes were identified by ultraperformance liquid chromatography–mass spectrometry (UPLC/MS), and the ibuprofen degradation pathway was proposed. The very promising results offer an advantageous approach to drug mineralization without the need for costly materials or expensive processes.

Uncontrolled Keywords

bismuth oxybromide; ibuprofen; ultrasound; photocatalysis; piezo-photocatalysis; mineralization

Additional Information: Published as part of the ACS Photonics virtual special issue "Photonics for Energy".
Department: Department of Chemical Engineering
Funders: Velux Stiftung, Università degli Studi di Milano
PolyPublie URL: https://publications.polymtl.ca/56700/
Journal Title: ACS Photonics (vol. 10, no. 11)
Publisher: American Chemical Society
DOI: 10.1021/acsphotonics.3c00724
Official URL: https://doi.org/10.1021/acsphotonics.3c00724
Date Deposited: 23 Jan 2024 15:57
Last Modified: 02 Oct 2024 14:16
Cite in APA 7: Falletta, E., Galloni, M. G., Mila, N., bin Roslan, M. N., Ghani, N. A., Cerrato, G., Giordana, A., Magni, M., Spriano, S. M., Boffito, D. C., & Bianchi, C. L. (2023). Fast and efficient piezo-photocatalytic mineralization of ibuprofen by BiOBr nanosheets under solar light irradiation. ACS Photonics, 10(11), 3929-3943. https://doi.org/10.1021/acsphotonics.3c00724

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