Decoration of TiO2 nanotube layers with WO3 nanocrystals for high-electrochromic activity

被引：93

作者：

Benoit, A. ^{[1
]}

Paramasivam, I. ^{[1
]}

Nah, Y-C. ^{[1
]}

Roy, P. ^{[1
]}

Schmuki, P. ^{[1
]}

机构：

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

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 04期

关键词：

TiO2; nanotubes; WO3; nanoparticle; Electrochromism; ELECTROLYTES; ANODIZATION; INSERTION; GROWTH; FILMS; OXIDE; AG;

D O I：

10.1016/j.elecom.2009.01.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report a simple approach to decorate ordered TiO2 nanotube (TiNT) layers with tungsten trioxide nanocrystallites by the controlled hydrolysis of a WCl6 precursor. These WO3 nanocrystallites, when formed, are amorphous, but can be annealed to a monoclinic crystal structure. The WO3 crystallites on the TiO2 nanotube skeleton are electrochemically active, and hence ion insertion reactions are possible. As a result, the decorated nanotube layers show remarkable enhancement of the electrochromic properties. In particular, a significantly lower threshold voltage and an increased electrochromic contrast can be achieved compared with unloaded (neat) TiO2 nanotube layers. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：728 / 732

页数：5

共 21 条

[1] Enhanced energy conversion efficiency of TiO2 electrode modified with WO3 in dye-sensitized solar cells
Cheng, Ping
Deng, Changsheng
Dai, Xiaming
Li, Bing
Liu, Danian
Xu, Jingming
[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2008, 195 (01) : 144 - 150
[2] ELECTRICAL AND OPTICAL PROPERTIES OF RUTILE SINGLE CRYSTALS
CRONEMEYER, DC
[J]. PHYSICAL REVIEW, 1952, 87 (05): : 876 - 886
[3] INFRARED ABSORPTION OF REDUCED RUTILE TIO2 SINGLE CRYSTALS
CRONEMEYER, DC
[J]. PHYSICAL REVIEW, 1959, 113 (05): : 1222 - 1226
[4] OPTICAL AND PHOTOELECTRIC PROPERTIES AND COLOR CENTERS IN THIN-FILMS OF TUNGSTEN OXIDE
DEB, SK
[J]. PHILOSOPHICAL MAGAZINE, 1973, 27 (04): : 801 - 822
[5] TiO2 nanotubes:: H+ insertion and strong electrochromic effects
Ghicov, A
Tsuchiya, H
Hahn, R
Macak, JM
Muñoz, AG
Schmuki, P
[J]. ELECTROCHEMISTRY COMMUNICATIONS, 2006, 8 (04) : 528 - 532
[6] GHICOV A, 2008, ANGEW CHEM INT EDIT, V47, P1
[7] GHICOV A, CHEM COMMUN UNPUB
[8] Granqvist G.V., 1995, Handbook of Inorganic Electrochromic Materials
[9] FAST ELECTROCHROMIC SWITCHING WITH NANOCRYSTALLINE OXIDE SEMICONDUCTOR-FILMS
HAGFELDT, A
VLACHOPOULOS, N
GRATZEL, M
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (07) : L82 - L84
[10] Lithium-ion insertion in anodic TiO2 nanotubes resulting in high electrochromic contrast
Hahn, Robert
Ghicov, Andrei
Tsuchiya, Hiroaki
Macak, Jan M.
Munoz, Andres G.
Schmuki, Patrik
[J]. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2007, 204 (05): : 1281 - 1285

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