Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: the effect of applied voltage, anodization time and amount of nitrogen dopant

Paweł Mazierski , Michał Nischk , Marta Gołkowska , Wojciech Lisowski , Maria Gazda , Michał Jerzy Winiarski , Tomasz Klimczuk , Adriana Zaleska-Medynska

Abstract

Nitrogen doped TiO2 nanotube arrays were prepared by anodizing Ti foils in an organic electrolyte containing specified amounts of urea as nitrogen precursor. The photocatalytic activity of the samples was evaluated by analyzing the degradation kinetics of phenol in water. The influence of tubes’ length, tubes’ surface morphology and amount of nitrogen in the TiO2 lattice on hydroxyl radical formation efficiency, photocatalytic activity and stability in four cycles was investigated. It was found that the photocatalytic activity as well as the charge carrier recombination rate depends on nitrogen concentration and the process parameters. 3.5 μm-long nanotubes containing 0.34 at.% of nitrogen seems to be favorable in phenol degradation and OH radicals generation under visible light. Comparison of XPS and photocatalytic activity test results shows decrease in phenol degradation efficiency with increasing amount of carbon contaminants on photocatalysts’ surface.
Author Paweł Mazierski PFotokatalizy
Paweł Mazierski ,,
- Laboratory of Photocatalysis
, Michał Nischk PFotokatalizy
Michał Nischk,,
- Laboratory of Photocatalysis
, Marta Gołkowska PFotokatalizy
Marta Gołkowska,,
- Laboratory of Photocatalysis
, Wojciech Lisowski
Wojciech Lisowski,,
-
, Maria Gazda
Maria Gazda,,
-
, Michał Jerzy Winiarski
Michał Jerzy Winiarski,,
-
, Tomasz Klimczuk
Tomasz Klimczuk,,
-
, Adriana Zaleska-Medynska PFotokatalizy - [Politechnika Gdańska]
Adriana Zaleska-Medynska,,
- Laboratory of Photocatalysis
- Politechnika Gdańska
Journal seriesApplied Catalysis B: Environmental, ISSN 0926-3373
Issue year2016
Vol196
Pages77-88
Publication size in sheets0.55
Keywords in EnglishTiO2 nanotubes, nitrogen doping, heterogeneous photocatalysis, electrochemical oxidation
DOIDOI:10.1016/j.apcatb.2016.05.006
URL http://dx.doi.org/10.1016/j.apcatb.2016.05.006
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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