Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten

被引：26

作者：

Wang, Chun-Kai ^{[1
]}

Lin, Chung-Kwei ^{[2
]}

Wu, Ching-Lin ^{[1
]}

Wang, Sheng-Chang ^{[3
]}

Huang, Jow-Lay ^{[1
,4
,5
,6
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan

[2] Taipei Med Univ, Coll Oral Med, Sch Dent Technol, Taipei, Taiwan

[3] Southern Taiwan Univ, Dept Mech Engn, Tainan, Taiwan

[4] Natl Cheng Kung Univ, Res Ctr Energy Technol & Strategy, Tainan 70101, Taiwan

[5] Natl Univ Kaohsiung, Dept Chem & Mat Engn, Kaohsiung, Taiwan

[6] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 70101, Taiwan

来源：

ELECTROCHIMICA ACTA | 2013年 / 112卷

关键词：

Plate-like tungsten oxide films; Acidic treatment; Electrochromism; ORGANIZED NANOPOROUS WO3; THIN-FILMS; PHOTOCATALYTIC ACTIVITY; OXIDATION; NANOPARTICLES; ENHANCEMENT; GROWTH;

D O I：

10.1016/j.electacta.2013.07.204

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Tungsten films on ITO glass were anodized into a porous amorphous WO3 film morphology at 60 V. The follow-up acidic treatment of the anodized WO3 films in H2SO4 solution transformed the morphology into plate-like WO3 center dot 2H(2)O. Glancing incident X-ray diffraction and Raman scattering spectra indicated that the growth of plate-like WO3 center dot 2H(2)O films was caused by a dissolution-precipitation reaction in H2SO4 solution. The plate-like WO3 center dot 2H(2)O transformed into monoclinic WO3 by dehydration at 400 degrees C, and it collapsed into a dense particle-like one at 500 degrees C due to the strain of dehydration. Due to its highly porous plate-like morphology, the 400 degrees C-annealed WO3 film has the highest optical modulation of 52% and coloration efficiency of 71 cm(2)/C at 633 nm. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：24 / 31

页数：8

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