| Title: | Highly porous polymer beads coated with nanometer-thick metal oxide films for photocatalytic oxidation of bisphenol A |
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| Authors: | ID Ballai, Gergő (Author)
ID Kotnik, Tomaž (Author)
ID Finšgar, Matjaž (Author)
ID Pintar, Albin (Author)
ID Kónya, Zoltán (Author)
ID Sápi, András (Author)
ID Kovačič, Sebastijan (Author) |
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| Files: |  http://dx.doi.org/10.1021/acsanm.3c03891
 ballai-et-al-2023-highly-porous-polymer-beads-coated-with-nanometer-thick-metal-oxide-films-for-photocatalytic.pdf (13,74 MB)
MD5: 74E8653C27787F0AE63F4D8370E9005E
https://pubs.acs.org/doi/10.1021/acsanm.3c03891
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Highly porous metal oxide−polymer nanocomposites are attracting considerable interest due to their unique structural and functional features. A porous polymer matrix brings properties such as high porosity and permeability, while the metal oxide phase adds functionality. For the metal oxide phase to perform its function, it must be fully accessible, and this is possible only at the pore surface, but functioning surfaces require controlled engineering, which remains a challenge. Here, highly porous nanocomposite beads based on thin metal oxide nanocoatings and polymerized high internal phase emulsions (polyHIPEs) are demonstrated. By leveraging the unique properties of polyHIPEs, i.e., a three-dimensional (3D) interconnected network of macropores, and high-precision of the atomic-layer-deposition technique (ALD), we were able to homogeneously coat the entire surface of the pores in polyHIPE beads with TiO$_2$-, ZnO-, and Al$_2$O$_3$-based nanocoatings. Parameters such as nanocoating thickness, growth per cycle (GPC), and metal oxide (MO) composition were systematically controlled by varying the number of deposition cycles and dosing time under specific process conditions. The combination of polyHIPE structure and ALD technique proved advantageous, as MO-nanocoatings with thicknesses between 11 ± 3 and 40 ± 9 nm for TiO$_2$ or 31 ± 6 and 74 ± 28 nm for ZnO and Al$_2$O$_3$, respectively, were successfully fabricated. It has been shown that the number of ALD cycles affects both the thickness and crystallinity of the MO nanocoatings. Finally, the potential of ALD-derived TiO$_2$-polyHIPE beads in photocatalytic oxidation of an aqueous bisphenol A (BPA) solution was demonstrated. The beads exhibited about five times higher activity than nanocomposite beads prepared by the conventional (Pickering) method. Such ALD-derived polyHIPE nanocomposites could find wide application in nanotechnology, sensor development, or catalysis. |
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| Keywords: | nanovlakna, aerosoli, filtracija, emulsion-templating, macroporous polymers, atomic-layer-deposition |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 20.08.2023 |
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| Article acceptance date: | 09.10.2023 |
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| Publication date: | 24.10.2023 |
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| Publisher: | ACS Publications (American Chemical Society) |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 20089–20098 |
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| Numbering: | Vol. 6, iss. 21 |
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| PID: | 20.500.12556/DKUM-86543  |
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| UDC: | 620.3 |
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| ISSN on article: | 2574-0970 |
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| COBISS.SI-ID: | 169904131 |
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| DOI: | 10.1021/acsanm.3c03891 |
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| Publication date in DKUM: | 15.04.2024 |
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| Views: | 249 |
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| Downloads: | 17 |
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| Metadata: |    |
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| Categories: | Misc.
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