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

被引：118

作者：

Mazierski, Pawel ^{[1
]}

Nischk, Michal ^{[1
]}

Golkowska, Marta ^{[1
]}

Lisowski, Wojciech ^{[2
]}

Gazda, Maria ^{[3
]}

Winiarski, Michal Jerzy ^{[3
]}

Klimczuk, Tomasz ^{[3
]}

Zaleska-Medynska, Adriana ^{[1
,4
]}

机构：

[1] Univ Gdansk, Dept Environm Technol, Fac Chem, PL-80308 Gdansk, Poland

[2] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

[3] Gdansk Univ Technol, Fac Appl Phys & Math, Dept Solid State Phys, PL-80233 Gdansk, Poland

[4] Gdansk Univ Technol, Dept Chem Technol, Fac Chem, PL-80233 Gdansk, Poland

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2016年 / 196卷

关键词：

TiO2; nanotubes; Nitrogen doping; Heterogeneous photocatalysis; Electrochemical oxidation; TITANIUM-DIOXIDE; PARTICLE-SIZE; ANATASE TIO2; THIN-FILMS; SOL-GEL; EFFICIENT; ARRAYS; DYE; DEGRADATION; NANOPARTICLES;

D O I：

10.1016/j.apcatb.2016.05.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 mu 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. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：77 / 88

页数：12

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