Enhanced photocatalytic, electrochemical and photoelectrochemical properties of TiO2

Michał Nischk , Paweł Mazierski , Zhishun Wei , Katarzyna Siuzdak , Natalie Amoin Kouame , Ewa Kowalska , Hynd Remita , Adriana Zaleska-Medynska

Abstract

TiO2 nanotubes arrays (NTs), obtained via electrochemical anodization of Ti foil, were modified with monometallic (Cu, Bi) and bimetallic (AgCu) nanoparticles. Different amounts of metals’ precursors were deposited on the surface of NTs by the spin-coating technique, and the reduction of metals was performed via gamma radiolysis. Surface modification of titania was studied by EDS and XPS analysis. The results show that AgCu nanoparticles exist in a Agcore-Cushell form. Photocatalytic activity was examined under UV irradiation and phenol was used as a model pollutant of water. Over 95% of phenol degradation was achieved after 60 min of irradiation for almost all examined samples, but only slight difference in degradation efficiency (about 3%) between modified and bare NTs was observed. However, the initial phenol degradation rate and TOC removal efficiency was significantly enhanced for the samples modified with 0.31 and 0.63 mol% of Bi as well as for all the samples modified with Cu and AgCu nanoparticles in comparison with bare titania nanotubes. The saturated photocurrent, under the influence of simulated solar light irradiation, for the most active Bi- and AgCu-modified samples, was over two times higher than for pristine NTs. All the examined materials were resistant towards photocorrosion processes that enables their application for long term processes induced by light.
Author Michał Nischk PFotokatalizy - [Politechnika Gdańska]
Michał Nischk,,
- Laboratory of Photocatalysis
- Politechnika Gdańska
, Paweł Mazierski PFotokatalizy
Paweł Mazierski ,,
- Laboratory of Photocatalysis
, Zhishun Wei
Zhishun Wei,,
-
, Katarzyna Siuzdak
Katarzyna Siuzdak,,
-
, Natalie Amoin Kouame
Natalie Amoin Kouame,,
-
, Ewa Kowalska
Ewa Kowalska,,
-
, Hynd Remita
Hynd Remita,,
-
, Adriana Zaleska-Medynska PFotokatalizy
Adriana Zaleska-Medynska,,
- Laboratory of Photocatalysis
Journal seriesApplied Surface Science, ISSN 0169-4332
Issue year2016
Vol387
Pages89-102
Publication size in sheets0.65
Keywords in EnglishTiO2 nanotubes, metal nanoparticles, radiolysis, phenol degradation, photoelectrochemical performance
DOIDOI:10.1016/j.apsusc.2016.06.066
URL http://dx.doi.org/10.1016/j.apsusc.2016.06.066
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)35
ScoreMinisterial score = 35.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 3.387 (2) - 2016=3.184 (5)
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