20.500.12556/RUL-152694 Highly porous polymer beads coated with nanometer-thick metal oxide films for photocatalytic oxidation of bisphenol A 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. emulsion-templating macroporous polymers atomic-layer-deposition metal-oxide nanocoating heterogeneous photocatalysis deposition nanocomposites oxides thickness nanovlakna aerosoli filtracija true false true Angleški jezik Slovenski jezik Članek v reviji 2023-12-04 14:06:13 2023-12-04 14:06:14 2023-12-05 03:41:08 0000-00-00 00:00:00 2023 0 0 Str. 20089−20098 iss. 21 Vol. 6 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.3 2574-0970 10.1021/acsanm.3c03891 169904131 ballai-et-al-2023-highly-porous-polymer-beads-coated-with-nanometer-thick-metal-oxide-films-for-photocatalytic.pdf ballai-et-al-2023-highly-porous-polymer-beads-coated-with-nanometer-thick-metal-oxide-films-for-photocatalytic.pdf 1 D85DDC6CC86DCCB6B66CBA1570DFDAC5 3efbae41fd2e9b395e8a91570d6e08c2aafb7c9aa371050fb1b0f4ba74e1ac0e 41713205-92a6-11ee-9ca9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178306 https://pubs.acs.org/doi/10.1021/acsanm.3c03891 0 0ac6af20-92a6-11ee-9ca9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178305 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0