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

被引：613

作者：

Batzill, M ^{[1
]}

Morales, EH ^{[1
]}

Diebold, U ^{[1
]}

机构：

[1] Tulane Univ, Dept Phys, New Orleans, LA 70118 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.96.026103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nitrogen doping-induced changes in the electronic properties, defect formation, and surface structure of TiO2 rutile(110) and anatase(101) single crystals were investigated. No band gap narrowing is observed, but N doping induces localized N 2p states within the band gap just above the valence band. N is present in a N(III) valence state, which facilitates the formation of oxygen vacancies and Ti 3d band gap states at elevated temperatures. The increased O vacancy formation triggers the 1x2 reconstruction of the rutile (110) surface. This thermal instability may degrade the catalyst during applications.

引用

页数：4

共 19 条

[1] Visible-light photocatalysis in nitrogen-doped titanium oxides
Asahi, R
Morikawa, T
Ohwaki, T
Aoki, K
Taga, Y
[J]. SCIENCE, 2001, 293 (5528) : 269 - 271
[2] THE ROLE OF METAL-ION DOPANTS IN QUANTUM-SIZED TIO2 - CORRELATION BETWEEN PHOTOREACTIVITY AND CHARGE-CARRIER RECOMBINATION DYNAMICS
CHOI, WY
TERMIN, A
HOFFMANN, MR
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (51) : 13669 - 13679
[3] Donor impurity band exchange in dilute ferromagnetic oxides
Coey, JMD
Venkatesan, M
Fitzgerald, CB
[J]. NATURE MATERIALS, 2005, 4 (02) : 173 - 179
[4] Characterization of paramagnetic species in N-doped TiO2 powders by EPR spectroscopy and DFT calculations
Di Valentin, C
Pacchioni, G
Selloni, A
Livraghi, S
Giamello, E
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (23) : 11414 - 11419
[5] Origin of the different photoactivity of N-doped anatase and rutile TiO2 -: art. no. 085116
Di Valentin, C
Pacchioni, G
Selloni, A
[J]. PHYSICAL REVIEW B, 2004, 70 (08): : 085116 - 1
[6] The surface science of titanium dioxide
Diebold, U
[J]. SURFACE SCIENCE REPORTS, 2003, 48 (5-8) : 53 - 229
[7] Comparison of surface oxidation of titanium nitride and chromium nitride films studied by x-ray absorption and photoelectron spectroscopy
Esaka, F
Furuya, K
Shimada, H
Imamura, M
Matsubayashi, N
Sato, H
Nishijima, A
Kawana, A
Ichimura, H
Kikuchi, T
[J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1997, 15 (05): : 2521 - 2528
[8] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE
FUJISHIMA, A
HONDA, K
[J]. NATURE, 1972, 238 (5358) : 37 - +
[9] GOSH AK, 1977, J ELECTROCHEM SOC, V124, P1516
[10] Gratzel M, 1991, NATURE, V353, P737, DOI DOI 10.1038/53737A0

← 1 2 →