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Materials characterization of TiO2 nanotubes decorated by Au nanoparticles for photoelectrochemical applications

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cris.lastimport.scopus2024-02-12T20:57:23Z
dc.abstract.enThe structural and chemical modification of TiO2 nanotubes (NTs) by the deposition of a well-controlled Au deposit was investigated using a combination of X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Scanning Transmission Electron Microscopy (STEM), Raman measurements, UV-Vis spectroscopy and photoelectrochemical investigations. The fabrication of the materials focused on two important factors: the deposition of Au nanoparticles (NPs) in UHV (ultra high vacuum) conditions (1-2 x 10(-8) mbar) on TiO2 nanotubes (NTs) having a diameter of similar to 110 nm, and modifying the electronic interaction between the TiO2 NTs and Au nanoparticles (NPs) with an average diameter of about 5 nm through the synergistic effects of SMSI (Strong Metal Support Interaction) and LSPR (Local Surface Plasmon Resonance). Due to the formation of unique places in the form of "hot spots", the proposed nanostructures proved to be photoactive in the UV-Vis range, where a characteristic gold plasmonic peak was observed at a wavelength of 580 nm. The photocurrent density of Au deposited TiO2 NTs annealed at 650 degrees C was found to be much greater (14.7 mu A cm(-2)) than the corresponding value (similar to 0.2 mu A cm(-2)) for nanotubes in the as-received state. The IPCE (incident photon current efficiency) spectral evidence also indicates an enhancement of the photoconversion of TiO2 NTs due to Au NP deposition without any significant change in the band gap energy of the titanium dioxide (E-g similar to 3.0 eV). This suggests that a plasmon-induced resonant energy transfer (PRET) was the dominant effect responsible for the photoactivity of the obtained materials.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorZaraska, Leszek
dc.contributor.authorGurgul, Magdalena
dc.contributor.authorBieńkowski, Krzysztof
dc.contributor.authorSolarska, Renata
dc.contributor.authorAndrzejczuk, Mariusz
dc.contributor.authorLisowski, Wojciech
dc.contributor.authorPisarek, Marcin
dc.contributor.authorHołdyński, Marcin
dc.contributor.authorKrawczyk, Mirosław
dc.contributor.authorKosiński, Andrzej
dc.contributor.authorKrajczewski, Jan
dc.date.accessioned2024-01-25T05:34:06Z
dc.date.available2024-01-25T05:34:06Z
dc.date.copyright2021-12-10
dc.date.issued2021
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number61
dc.description.versionFINAL_PUBLISHED
dc.description.volume11
dc.identifier.doi10.1039/D1RA07443A
dc.identifier.issn2046-2069
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/111910
dc.identifier.weblinkhttps://pubs.rsc.org/en/content/articlepdf/2021/ra/d1ra07443a
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofRSC Advances
dc.relation.pages38727-38738
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleMaterials characterization of TiO2 nanotubes decorated by Au nanoparticles for photoelectrochemical applications
dc.typeJournalArticle
dspace.entity.typePublication