X-ray absorption and XPS study of titanium mixed oxides synthesized by the sol-gel method

被引：23

作者：

Gonçalves, JE

Castro, SC

Ramos, AY

Alves, MCM

Gushikem, Y

机构：

[1] UNICAMP, Inst Quim, BR-13083970 Campinas, SP, Brazil

[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

[3] Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2001年 / 114卷

基金：

巴西圣保罗研究基金会;

关键词：

XPS; X-ray absorption; silica-titania; silica-titania-antimonia; sol-gel;

D O I：

10.1016/S0368-2048(00)00323-6

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The mixed oxides SiO2/TiO2 and SiO2/TiO2/Sb2O5 were prepared with different Ti and Sb amounts and investigated by X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) at the Ti K edge. There is no evidence for structural modification of titanium environment in the samples having between 5.6 and 20.3 wt% of TiO2. All the experimental evidence indicates that titanium has a local environment close to that of TiO2 anatase. XAS show that this similarity is extends up to the next neighbouring Ti shells. XPS analysis shows that Ti and Sb are present as TiO2 and Sb2O5. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：307 / 311

页数：5

共 14 条

[11] RELATIONSHIPS BETWEEN MICROSTRUCTURE AND SURFACE-ACIDITY OF TI-SI MIXED-OXIDE CATALYSTS [J].