Enhanced photocatalytic properties of lanthanide-TiO2 nanotubes: an experimental and theoretical study

Paweł Mazierski , Wojciech Lisowski , Tomasz Grzyb , Michał Jerzy Winiarski , Tomasz Klimczuk , Alicja Mikołajczyk , Jakub Flisikowski , Adam Hirsch , Agnieszka Kołakowska , Tomasz Puzyn , Adriana Zaleska-Medynska , Joanna Nadolna

Abstract

A series of Er-, Yb-, Ho-, Tb-, Gd-, Pr-TiO2 nanotubes (RE-NTs) was prepared via an electrochemical method. The as-prepared photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–vis absorption, scanning electron microscopy (SEM) and luminescent spectroscopy. The experiments demonstrated that toluene in the gas phase was successfully degraded under visible light (LEDs λmax = 465 nm) using RE-NTs. In the presence of the most active sample (Ho-NTs), the photodegradation of toluene reached 30% after 60 min of vis irradiation. To investigate the localization of RE in the TiO2 structure, computer simulations were performed using the plane-wave-based Vienna ab-initio simulation package (VASP) implementing spin-polarized density-functional theory (DFT) and the generalized gradient approximation (GGA). It is proposed that during the electrochemical process, TiO2 systems with new Ho-f states below the conduction band of TiO2 is formed. The photocatalytic activity under Vis irradiation is attributable not to OH but to other forms of reactive oxygen species (O2−, HO2, H2O2).
Author Paweł Mazierski (FCh / DET / LPh)
Paweł Mazierski ,,
- Laboratory of Photocatalysis
, Wojciech Lisowski
Wojciech Lisowski,,
-
, Tomasz Grzyb
Tomasz Grzyb,,
-
, Michał Jerzy Winiarski
Michał Jerzy Winiarski,,
-
, Tomasz Klimczuk
Tomasz Klimczuk,,
-
, Alicja Mikołajczyk (FCh / DEChR / LECh)
Alicja Mikołajczyk,,
- Laboratory of Environmental Chemometrics
, Jakub Flisikowski (FCh / DET / LPh)
Jakub Flisikowski,,
- Laboratory of Photocatalysis
, Adam Hirsch (FCh / DET / LPh)
Adam Hirsch,,
- Laboratory of Photocatalysis
, Agnieszka Kołakowska (FCh / DET / LPh)
Agnieszka Kołakowska,,
- Laboratory of Photocatalysis
, Tomasz Puzyn (FCh / DEChR / LECh)
Tomasz Puzyn,,
- Laboratory of Environmental Chemometrics
et al.`
Journal seriesApplied Catalysis B: Environmental, ISSN 0926-3373, (A 45 pkt)
Issue year2017
Vol205
Pages376-385
Publication size in sheets0.5
DOIDOI:10.1016/j.apcatb.2016.12.044
URL http://dx.doi.org/10.1016/j.apcatb.2016.12.044
Languageen angielski
Score (nominal)45
ScoreMinisterial score = 45.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 9.446 (2) - 2016=8.87 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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