Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant - Publication - Bridge of Knowledge

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

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 m-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.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
APPLIED CATALYSIS B-ENVIRONMENTAL no. 196, pages 77 - 88,
ISSN: 0926-3373
Language:
English
Publication year:
2016
Bibliographic description:
Mazierski P., Nischk M., Gołkowska M., Lisowski W., Gazda M., Winiarski M., Klimczuk T., Zaleska-Medynska A.: Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant// APPLIED CATALYSIS B-ENVIRONMENTAL. -Vol. 196, (2016), s.77-88
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apcatb.2016.05.006
Verified by:
Gdańsk University of Technology

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