Surface-modified anodic TiO2 films for visible light photocurrent response

被引：100

作者：

Beranek, Radim ^{[1
]}

Kisch, Horst ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Inorgan Chem, D-91058 Erlangen, Germany

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2007年 / 9卷 / 04期

关键词：

photocurrent; visible light; anodic TiO2; nitrogen modification; flatband potential;

D O I：

10.1016/j.elecom.2006.11.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

N-doped titania thin films were prepared by anodic oxidation of titanium sheets and subsequent heat treatment in the presence of urea pyrolysis products at 400 degrees C. The resulting films are modified predominantly at the surface. They exhibited a significant photocurrent response upon visible light irradiation inducing an incident photon-to-current efficiency of 1.5%, at 400 rim. The flatband potential was anodically shifted by 0.2 V as compared to the unmodified film. Photocurrent transients revealed that nitrogen-centered intra-bandgap states, responsible for visible light response, induce also enhanced recombination as indicated by a cathodic "overshoot" after turning off the light. This recombination can be inhibited by the presence of iodide. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：761 / 766

页数：6

共 50 条

[1] TRANSIENT PHOTOCURRENTS AT PASSIVE IRON ELECTRODES [J].

ABRANTES, LM ;

PETER, LM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 150 (1-2) :593-601

[2] ANODIC-OXIDATION OF TITANIUM IN SULFURIC SOLUTION - NATURE, THICKNESS AND REFRACTIVE-INDEX OF FILMS [J].

ARSOV, L ;

FROELICHER, M ;

FROMENT, M ;

HUGOTLEGOFF, A .

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1975, 72 (03) :275-279

[3] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[4] Influence of nitrogen doping on the defect formation and surface properties of TiO2 rutile and anatase -: art. no. 026103 [J].

Batzill, M ;

Morales, EH ;

Diebold, U .

PHYSICAL REVIEW LETTERS, 2006, 96 (02)

[5] Enhancement and limits of the photoelectrochemical response from anodic TiO2 nanotubes -: art. no. 243114 [J].

Beranek, R ;

Tsuchiya, H ;

Sugishima, T ;

Macak, JM ;

Taveira, L ;

Fujimoto, S ;

Kisch, H ;

Schmuki, P .

APPLIED PHYSICS LETTERS, 2005, 87 (24) :1-3

[6] Self-organized porous titanium oxide prepared in H2SO4/HF electrolytes [J].

Beranek, R ;

Hildebrand, H ;

Schmuki, P .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (03) :B12-B14

[7]

BERANEK R, UNPUB

[8] Reply to "Comment on "Photoelectron spectroscopic investigation of nitrogen-doped titania nanoparticles" [J].

Burda, C ;

Gole, J .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (13) :7081-7082

[9] Photoinduced reactivity of titanium dioxide [J].

Carp, O ;

Huisman, CL ;

Reller, A .

PROGRESS IN SOLID STATE CHEMISTRY, 2004, 32 (1-2) :33-177

[10] Formation of oxynitride as the photocatalytic enhancing site in nitrogen-doped titania nanocatalysts: Comparison to a commercial nanopowder [J].

Chen, XB ;

Lou, YB ;

Samia, ACS ;

Burda, C ;

Gole, JL .

ADVANCED FUNCTIONAL MATERIALS, 2005, 15 (01) :41-49

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