Title of article
XAFS study of TiO2/SiO2 system prepared by sol–gel from inorganic precursors
Author/Authors
Kriventsov، نويسنده , , V.V and Kochubey، نويسنده , , D.I and Tsodikov، نويسنده , , M.V and Navio، نويسنده , , J.A. and Restrepo، نويسنده , , G.M. and Macias، نويسنده , , M.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2001
Pages
6
From page
347
To page
352
Abstract
The samples of 5%TiO2/SiO2 prepared by sol–gel method from inorganic precursors calcinated at the various temperatures were studied by XAFS spectroscopy at Siberian Synchrotron Radiation Center. It was established that structural lability of this system and the change of symmetry of the oxygen coordination around the Ti(+4) ions depends on the calcination temperature. It seems that the mechanism of dissolution of the Ti(4+) ions in SiO2 depends on the calcination temperature and consists in the formation of Wadsley defects following the incorporation of SiO2 in TiO2 particles.
Keywords
Nanoparticles , structure , coordination , silicate , XAFS , Titania-silica
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2001
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2192469
Link To Document