Reactivities study of titanium sites in titanosilicate frameworks by in situ XANES

被引：9

作者：

Nguyen, Hong K. D. ^{[1
]}

Sankar, Gopinathan ^{[2
]}

Catlow, Richard A. ^{[2
]}

机构：

[1] Hanoi Univ Sci & Technol, Sch Chem Engn, C4-306, Hanoi, Vietnam

[2] UCL, Dept Chem, 20 Gordon St, London WC1H 0AJ, England

来源：

JOURNAL OF POROUS MATERIALS | 2017年 / 24卷 / 02期

关键词：

XANES; Titanosilicate; Nanoporous frameworks; Titanium sites; COORDINATION CHEMISTRY; SILICATE-GLASSES; OXIDATION; CATALYSTS; TI(IV); MELTS; XAFS;

D O I：

10.1007/s10934-016-0275-z

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This study focused on the study of titanium sites, their local structure and reactivities in nanoporous titanosilicates frameworks by using in situ X-ray absorption spectroscopy. XANES provides the information on the oxidation state of the titanium species as well as their change in coordination geometry during de- and re-hydration. Results from in situ XANES studies shows that TS-1 is much more hydrophobic than TiAl or TiFe systems. Pre-edge features of Ti K-edge XANES spectra of these materials also suggested that Ti-IV is the dominant Ti coordination in dehydrated system whilst Ti-VI is the dominant in the re-hydrated one.

引用

页码：421 / 428

页数：8

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