TiO2 and NaTaO3 decorated by trimetallic Au/Pd/Pt core-shell nanoparticles as efficient photocatalysts: experimental and computational studies

Anna Malankowska , Marek Kobylański , Alicja Mikołajczyk , Onur Cavdar , Grzegorz Nowaczyk , Marcin Jarek , Wojciech Lisowski , Monika Michalska , Ewa Kowalska , Bunsho Ohtani , Adriana Zaleska-Medynska

Abstract

Novel triple-layered trimetallic Au/Pd/Pt nanoparticles (NPs) with a porous Pt shell, showing a hedgehog-like structure, were successfully bounded with TiO2 and NaTaO3 surfaces, and used for photocatalytic purpose. To characterize all as-prepared samples, XRD, TEM, EDX, SEM, ISP-OES, DRS, XPS, and photoluminescence (PL) emission spectroscopy were applied. It was found that 25 nm Au/Pd/Pt core−shell NPs were formed, and good interaction between the porous Pt outer shells and the semiconductor surface was obtained. To appraise the effect of the semiconductor’s matrix type and the amount of used AuPdPt NPs on the photocatalytic performance, three types of reactions were employed: (i) degradation of phenol (under mono- and polychromatic irradiation), (ii) the efficiency of toluene removal in gas phase under visible light, and (iii) yield of H2 generation under UV−vis irradiation. Our results proved that the decoration of both TiO2 and NaTaO3 by AuPdPt NPs caused not only an increase in degradation yield of contaminants in the aqueous and gas phases but also significant enhancement in hydrogen generation. Amount of formed hydrogen was raised from 2.19 to 213.8 μmol/min for pristine rutile and rutile decorated by trimetallic NPs, respectively. In addition, the adsorption energy of water and oxygen molecules on modified TiO2_rutile and TiO2_anatase surface were investigated by the density functional (DFT) calculations. Data obtained by theoretical computation was found to be complementary to experimental results. In summary, the ternary metallic core−shell Au/Pd/Pt nanoparticles were successfully applied for TiO2 and NaTaO3 modification and resulted in providing new promising materials for the environmental purification and for production of alternative energy sources when irradiated under visible and UV−vis light.
Author Anna Malankowska (FCh / DET / LPh)
Anna Malankowska,,
- Laboratory of Photocatalysis
, Marek Kobylański (FCh / DET / LPh)
Marek Kobylański ,,
- Laboratory of Photocatalysis
, Alicja Mikołajczyk (FCh / DET / LPh)
Alicja Mikołajczyk,,
- Laboratory of Photocatalysis
, Onur Cavdar (FCh / DET / LPh)
Onur Cavdar,,
- Laboratory of Photocatalysis
, Grzegorz Nowaczyk
Grzegorz Nowaczyk,,
-
, Marcin Jarek
Marcin Jarek,,
-
, Wojciech Lisowski
Wojciech Lisowski,,
-
, Monika Michalska (FCh / DET / LPh)
Monika Michalska,,
- Laboratory of Photocatalysis
, Ewa Kowalska
Ewa Kowalska,,
-
, Bunsho Ohtani
Bunsho Ohtani,,
-
et al.`
Journal seriesACS Sustainable Chemistry & Engineering, ISSN 2168-0485, (A 40 pkt)
Issue year2018
Vol6
No12
Pages16665-16682
Publication size in sheets0.85
Keywords in EnglishAu/Pd/Pt nanoparticles, photocatalysis, TiO2, NaTaO3, hydrogen
DOIDOI:10.1021/acssuschemeng.8b03919
URL https://pubs.acs.org/doi/10.1021/acssuschemeng.8b03919
Languageen angielski
Score (nominal)40
ScoreMinisterial score = 40.0, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 5.951 (2) - 2016=6.079 (5); WoS Citations = 0
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