N-Doping of anodic TiO2 nanotubes using heat treatment in ammonia

被引：257

作者：

Vitiello, RP

Macak, JM

Ghicov, A

Tsuchiya, H

Dick, LFP

Schmuki, P

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci, WW4 LKO, D-91058 Erlangen, Germany

[2] Univ Fed Rio Grande do Sul, Dept Met Electrocorr, BR-91501970 Porto Alegre, RS, Brazil

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 04期

关键词：

titanium dioxide nanotubes; nitrogen doping; photoelectrochemistry; ammonia;

D O I：

10.1016/j.elecom.2006.01.023

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Self-organized TiO2 nanotube-layers were formed by electrochemical anodization of Ti in a HF/H2SO4 electrolyte. The nanotube layers were then treated at different temperatures (300-600 degrees C) in pure NH3. The samples were characterized by photoelectrochemistry, SEM, XRD and XPS. The results show clearly successful N-doping of the TiO2 nanotubes. The magnitude of the effect is strongly dependent on the duration and temperature of the ammonia treatment. Besides N-doping, the heat treatment causes - in one step - a conversion of the amorphous tubes to anatase. Both effects drastically improve the photoresponse of the TiO2 nanotubes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：544 / 548

页数：5

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