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TiO₂ nanotubes immobilized on polyurethane foam as a floating photocatalyst for water treatment

Nila Davari, Ermelinda Falletta, Claudia L. Bianchi, Viviane Yargeau and Daria Camilla Boffito

Article (2024)

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We investigated the photocatalytic activity of TiO₂ nanoparticles (TiO₂-NPs) and TiO₂ nanotubes (TiO₂-NTs) supported on a floating polyurethane (PU) foam for removing Bisphenol A (BPA) as a model pollutant. We fabricated TiO₂-NPs by the sol-gel method and TiO₂-NTs by the ultrasound-assisted hydrothermal method. Subsequently, the photocatalysts were immobilized onto the PU foam through the wet chemical deposition process. The synthesized photocatalysts were characterized by contact angle, SEM-EDS, TEM, XRD, DRS, and BET analyses. TiO₂-NPs and TiO₂-NTs were successfully deposited onto the PU foam, creating floating photocatalysts denoted as TiO₂-NPs@PU and TiO₂-NTs@PU. Our findings indicated that the nanotubular structure of floating TiO₂ photocatalysts enhanced the removal efficiency of BPA relative to the nanoparticles, resulting in the complete removal of the pollutant over 180 min of simulated sunlight irradiation. TiO₂-NTs@PU was also stable after five reuse cycles. Moreover, h+ was the main scavenging reactive species during the photocatalysis of BPA with TiO₂-NTs@PU.

Uncontrolled Keywords

photocatalyst; floating TiO₂ nanoparticules; floating TiO₂ nanotubes; PU foam; bisphenol A; sunlight

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
Department: Department of Chemical Engineering
Funders: Project 1381 - “SUNFLOAT - Water decontamination by sunlight-driven floating photocatalytic systems”, Bourse d’excellence Neil R. Mitchell et Danièle Dumais (Quebec, Canada)
PolyPublie URL: https://publications.polymtl.ca/58182/
Journal Title: Catalysis Today (vol. 436)
Publisher: Elsevier
DOI: 10.1016/j.cattod.2024.114725
Official URL: https://doi.org/10.1016/j.cattod.2024.114725
Date Deposited: 21 May 2024 10:46
Last Modified: 23 May 2024 10:14
Cite in APA 7: Davari, N., Falletta, E., Bianchi, C. L., Yargeau, V., & Boffito, D. C. (2024). TiO₂ nanotubes immobilized on polyurethane foam as a floating photocatalyst for water treatment. Catalysis Today, 436, 114725 (16 pages). https://doi.org/10.1016/j.cattod.2024.114725


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