Characterization of gasochromic vanadium oxides films by X-ray absorption spectroscopy

被引：24

作者：

Ho, Y. K. ^{[1
,2
]}

Chang, C. C. ^{[1
]}

Wei, D. H. ^{[2
]}

Dong, C. L. ^{[3
]}

Chen, C. L. ^{[1
]}

Chen, J. L. ^{[3
,4
]}

Jang, W. L. ^{[3
]}

Hsu, C. C. ^{[3
]}

Chan, T. S. ^{[3
]}

Kumar, Krishna ^{[5
]}

Chang, C. L. ^{[4
]}

Wu, M. K. ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[2] Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan

[3] Natl Synchrotron Radiat Res Ctr NSRRC, Hsinchu 30076, Taiwan

[4] Tamkang Univ, Dept Phys, Tamsui, Taiwan

[5] Inst Technol Tallaght ITT Dublin, Dept Sci, Dublin 24, Ireland

来源：

THIN SOLID FILMS | 2013年 / 544卷

关键词：

Vanadium oxide; Thin films; Gasochromic; Sol-gel; XAS; THERMOCHROMIC SMART GLASS; DOUBLE-LAYERED FILMS; THIN-FILMS; PHASE; V2O5; SPECTRA;

D O I：

10.1016/j.tsf.2013.02.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of vanadium oxide thin films with different layer thicknesses were prepared by the sol-gel process. These V2O5 thin films exhibited excellent gasochromic performance with color change from yellow to gray/black on exposure to hydrogen gas and fast response rate under ambient condition. The structure and morphology of the films were investigated by X-ray powder diffractometer and scanning electron microscope. The H-2 gasochromic property and the optical transmittance change of colored and bleached films were characterized by UV-visible spectrophotometer. Further, the gasochromic effect and the coloration mechanism of these films were investigated in detail by X-ray absorption spectroscopy. The investigations demonstrated that due to insertion of hydrogen ions, the valence state of vanadium varied from 4.8(+) to 4.1(+) and a distortion was observed in the structural symmetry of VO6 octahedron. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：461 / 465

页数：5

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