Effect of scandium on the structural and photocatalytic properties of titanium dioxide thin films

被引：27

作者：

Cavalheiro, A. A. ^{[1
]}

Bruno, J. C. ^{[1
]}

Saeki, M. J. ^{[1
]}

Valente, J. P. S. ^{[1
]}

Florentino, A. O. ^{[1
]}

机构：

[1] Univ Nacl Estadual Sao Paulo, Dept Quim, Inst Biociencias, BR-18618000 Botucatu, SP, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 02期

关键词：

D O I：

10.1007/s10853-007-1743-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure and scandium doped-TiO2 thin films were prepared by the sol-gel process and coated by dip coating. The effects of scandium on the phase formation, optical properties and photoactivity of the TiO2 thin films were investigated. The lattice parameters and the crystallinity of the anatase phase, characterized by the Rietveld method, demonstrated that scandium doping affected the structural parameters and crystallinity of the films, modifying the absorption edge. A direct correlation was found between band gap energy and photodegradation efficiency, with lower values of band gap energy augmenting this efficiency. Moreover, a significant improvement in the catalyst's photodegradation efficiency was attained with a scandium concentration of 5.0 mol%.

引用

页码：602 / 608

页数：7

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