Phase stability and photocatalytic activity of Zr-doped anatase synthesized in miniemulsion

A series of mesoporous anatase-type TiO(2) doped with zirconium (0-50 mol% Zr) was synthesized by combining the sol-gel process with the inverse miniemulsion technique. Nanoparticles between 100 and 300 nm were directly prepared from acidic precursor solutions of titanium glycolate (EGMT) and zircon...

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Bibliographic Details
Published in:Nanotechnology 2010-10, Vol.21 (40), p.405603-405603
Main Authors: Schiller, Renate, Weiss, Clemens K, Landfester, Katharina
Format: Article
Language:English
Subjects:
Anatase
Crystallites
Methylene blue
Nanoparticles
Nanostructure
Photocatalysis
Titanium dioxide
Transmission electron microscopy
Zirconium
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Summary:A series of mesoporous anatase-type TiO(2) doped with zirconium (0-50 mol% Zr) was synthesized by combining the sol-gel process with the inverse miniemulsion technique. Nanoparticles between 100 and 300 nm were directly prepared from acidic precursor solutions of titanium glycolate (EGMT) and zirconium isopropoxide. The miniemulsion technique is a simple and convenient method to synthesize nanoparticles of homogeneous size because the reactions (here hydrolysis and condensation) take place in the confined space of nanodroplets (several hundreds of nanometres) and therefore in a highly controlled manner. For low doping levels (0-7.1 mol% Zr), Zr(x)Ti(1 - x)O(2) solid solutions were formed where Zr was uniformly dispersed into the anatase framework. For higher amounts of zirconium (Zr >or= 7.1 mol%), the crystallization of zirconium titanate (ZrTiO(4)) occurred at a low temperature of 650 degrees C and it was obtained as a pure material for 47.4 mol%
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/21/40/405603