0556220 - ÚACH 2023 RIV CH eng J - Journal Article
Bakardjieva, Snejana - Mareš, Jakub - Kočí, Eva - Tolasz, Jakub - Fajgar, Radek - Ryukhtin, Vasyl - 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. ISSN 2079-4991. E-ISSN 2079-4991
R&D Projects: GA ČR(CZ) GA18-15613S
Grant - others:AV ČR(CZ) BAS-20-03
Program: Bilaterální spolupráce
Research Infrastructure: CzechNanoLab - 90110
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 (UCHP-M); Coating and films (UJF-V); Physical chemistry (UFCH-W); Inorganic and nuclear chemistry (FZU-D)
Impact factor: 5.3, year: 2022 ; AIS: 0.712, rok: 2022
Method of publishing: Open access
DOI: https://doi.org/10.3390/nano12050750

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