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Effect of Multiply Twinned Ag-(0) Nanoparticles on Photocatalytic Properties of TiO2 Nanosheets and TiO2 Nanostructured Thin Films

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    0556220 - ÚACH 2023 RIV CH eng J - Journal Article
    Bakardjieva, Snejana - Mareš, Jakub - Kočí, Eva - Tolasz, Jakub - Fajgar, Radek - Ryukhtin, Vasil - Klementová, Mariana - Michna, S. - Bíbová, Hana - Holmestad, R. - Titorenkova, R. - Čaplovicová, M.
    Effect of Multiply Twinned Ag-(0) Nanoparticles on Photocatalytic Properties of TiO2 Nanosheets and TiO2 Nanostructured Thin Films.
    Nanomaterials. Roč. 12, č. 5 (2022), č. článku 750. E-ISSN 2079-4991
    R&D Projects: GA ČR(CZ) GA18-15613S; GA MŠk LM2018110
    Grant - others: AV ČR(CZ) BAS-20-03
    Program: Bilaterální spolupráce
    Institutional support: RVO:61388980 ; RVO:67985858 ; RVO:61389005 ; RVO:68378271 ; RVO:61388955
    Keywords : anatase * Ag(0) NPs * twinned defects * nanosheets * thin films * photocatalytic activity
    OECD category: Inorganic and nuclear chemistry; Physical chemistry (UMCH-V); Condensed matter physics (including formerly solid state physics, supercond.) (UJF-V); Physical chemistry (UFCH-W)
    Impact factor: 5.719, year: 2021
    Method of publishing: Open access

    Ag-decorated TiO2 nanostructured materials are promising photocatalysts. We used non-standard cryo-lyophilization and ArF laser ablation methods to produce TiO2 nanosheets and TiO2 nanostructured thin films decorated with Ag nanoparticles. Both methods have a common advantage in that they provide a single multiply twinned Ag-(0) characterized by {111} twin boundaries. Advanced microscopy techniques and electron diffraction patterns revealed the formation of multiply twinned Ag-(0) structures at elevated temperatures (500 degrees C and 800 degrees C). The photocatalytic activity was demonstrated by the efficient degradation of 4-chlorophenol and Total Organic Carbon removal using Ag-TiO2 nanosheets, because the multiply twinned Ag-(0) served as an immobilized photocatalytically active center. Ag-TiO2 nanostructured thin films decorated with multiply twinned Ag-(0) achieved improved photoelectrochemical water splitting due to the additional induction of a plasmonic effect. The photocatalytic properties of TiO2 nanosheets and TiO2 nanostructured thin films were correlated with the presence of defect-twinned structures formed from Ag-(0) nanoparticles with a narrow size distribution, tuned to between 10 and 20 nm. This work opens up new possibilities for understanding the defects generated in Ag-TiO2 nanostructured materials and paves the way for connecting their morphology with their photocatalytic activity.
    Permanent Link: http://hdl.handle.net/11104/0330510

     
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