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Synthesis and Characterization of Nanoparticulate Sols of TiO2 Doped with Erbium (III) for Photoinduced Applications

Published online by Cambridge University Press:  30 July 2012

M. Borlaf ,
R. Moreno  and
M. T. Colomer
M. Borlaf
Affiliation:
Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, 28049, Madrid, Spain
R. Moreno
Affiliation:
Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, 28049, Madrid, Spain
M. T. Colomer
Affiliation:
Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, 28049, Madrid, Spain
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Abstract

Colloidal sol-gel is a common method used for the preparation of stable and homogeneous nanoparticulate sols. In this work, TiO2 and Er3+ doped-TiO2 sols (1, 2 and 3 mole % Er3+) have been prepared. The peptization time, viscosity and isoelectric point increase at higher Er3+ concentration indicating that erbium (III) delays the peptization process, increases the viscosity and adsorbs onto the surface of the TiO2 nanoparticles. When the sols of TiO2 are doped with Er3+ lower values of the band gap are obtained. After drying, in all cases, anatase was obtained as major phase although traces of brookite are also detected. The microstructure was observed by TEM and shows direct evidence that the xerogels are polycrystalline.

Keywords

sol-gelErtransmission electron microscopy (TEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1442: Symposium Q – Titanium Dioxide Nanomaterials--2012 , 2012 , mrss12-1442-q07-02
Copyright
Copyright © Materials Research Society 2012

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References

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