Issue 9, 2011
From the journal:

Journal of Materials Chemistry

Highly ordered mesoporous zirconia-polyoxometalate nanocomposite materials for catalytic oxidation of alkenes

Gerasimos S. Armatas,*a   Georgios Bilisb  and  Maria Louloudib  

* Corresponding authors

a Department of Materials Science and Technology, University of Crete, Heraklion, Crete, Greece
E-mail: garmatas@materials.uoc.gr
Fax: +30-2810-545197
Tel: +30-2810-545004

b Department of Chemistry, University of Ioannina, Ioannina, Greece

Abstract

A series of well-ordered mesoporous ZrO2-based heteropoly acid nanocomposite frameworks has been prepared through a surfactant-assisted sol–gel copolymerization route. The pore walls of these materials consist of nanocrystalline tetragonal ZrO2 and Keggin-type 12-phosphomolybdic acid (PMA) components with different PMA loadings, i.e. 12, 22 and 37 wt%. Small angle X-ray scattering, high-resolution TEM and N2 physisorption measurements indicated mesoporous property in hexagonal p6mm symmetry with large internal BET surface areas and narrow-sized pores. The incorporated PMA clusters preserve intact their Keggin structure into the mesoporous frameworks according to EDX, FT-IR and diffuse-reflectance UV/vis/NIR spectroscopy. The obtained ZrO2–PMA nanocomposites demonstrated great application potential in oxidative catalysis, exhibiting exceptional stability and catalytic activity in oxidation of alkenes using hydrogen peroxide as oxidant.

Graphical abstract: Highly ordered mesoporous zirconia-polyoxometalate nanocomposite materials for catalytic oxidation of alkenes

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Article information

DOI
https://doi.org/10.1039/C0JM03395B
Article type
Paper
Submitted
08 Oct 2010
Accepted
29 Nov 2010
First published
07 Jan 2011

J. Mater. Chem., 2011,21, 2997-3005

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Highly ordered mesoporous zirconia-polyoxometalate nanocomposite materials for catalytic oxidation of alkenes

G. S. Armatas, G. Bilis and M. Louloudi, J. Mater. Chem., 2011, 21, 2997 DOI: 10.1039/C0JM03395B

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