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Diclofenac photodegradation with the Perovskites BaFeyTi1-yO3 as catalysts

  • Advanced Oxidation/Reduction Technologies: An Perspective from Iberoamerican Countries
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Abstract

Perovskite oxides BaFeyTi1-yO3, with y = 0, 0.6, 0.8 and 1, were prepared by ceramic (CM) and complex polymerization methods (CPM) and utilized in UV-LED (365 nm) photocatalytic degradation assays of 25 mg L−1 diclofenac (DIC) model solutions. BaTiO3-CM was also used in the photocatalytic degradation test of a real mineral water for human consumption spiked with 2 mg L−1 DIC. The XRD patterns of the synthesized perovskites showed cubic structure for those prepared by CPM, with distortions of the cubic lattice to hexagonal or tetragonal when prepared by CM, except for BaTiO3. All the perovskites showed good catalytic activity, higher than photolysis, except BaFeO3-CM that presented similar results. BaTiO3-CM and CPM and BaFeO3-CPM were also utilized in UV-LED photocatalytic DIC degradation assays with peroxydisulfate addition. BaFeO3-CPM and BaTiO3-CPM showed better ability to persulfate activation, but the highest mineralization degree was obtained with BaTiO3-CM. This last perovskite was also able to perform DIC degradation in a real matrix. The studied oxides show potentiality for photocatalytic degradation of organic compounds, with or without persulfate addition. A degradation mechanism is proposed.

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Relevant data generated or analysed during this study are included in this published article (and its supplementary information files). Additional datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors thank Fundação para a Ciência e a Tecnologia, FCT, for the funding of the UID Fiber Materials and Environmental Technologies (FibEnTech-UBI), project UIDB/00195/2020, for the grant SFRH/BD/109901/2015 awarded to A.S. Rodrigues and for the contract funding awarded to A. Fernandes. This work was also supported by P2018/EMT-4341 Project financed by the Autonomous Community of Madrid. J. Carbajo thanks the Spanish Ministry of Science for the grant under the Juan de la Cierva Programme (IJCI-2017-32682).

Funding

This work was funded by Fundação para a Ciência e a Tecnologia, FCT, through the funding of the UID Fiber Materials and Environmental Technologies (FibEnTech-UBI), project UIDB/00195/2020, the funding of the grant SFRH/BD/109901/2015, awarded to A.S. Rodrigues, and the funding of the contract awarded to A. Fernandes. This work was also supported by P2018/EMT-4341 Project, financed by the Autonomous Community of Madrid. Additional funding was provided by the Spanish Ministry of Science through the grant awarded to J. Carbajo under the Juan de la Cierva Programme (IJCI-2017-32682).

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ASR: investigation, writing - original draft, project administration. JES: methodology, investigation, writing - review & editing. JC: methodology, validation, writing - review & editing. JAZ: validation, writing - review & editing. JAC: resources, writing - review & editing. AF: writing - original draft, project administration. MJP: writing - review & editing, visualization. LC: methodology, validation, writing - original draft. AL: conceptualization, writing.

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Correspondence to Lurdes Ciríaco.

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Rodrigues, A.S., Silveira, J.E., Carbajo, J. et al. Diclofenac photodegradation with the Perovskites BaFeyTi1-yO3 as catalysts. Environ Sci Pollut Res 28, 23822–23832 (2021). https://doi.org/10.1007/s11356-020-11328-4

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  • DOI: https://doi.org/10.1007/s11356-020-11328-4

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