Issue 47, 2010

Solvothermal and surfactant-free synthesis of crystalline Nb2O5, Ta2O5, HfO2, and Co-doped HfO2nanoparticles

Abstract

A simple route to niobium, hafnium and tantalum oxide nanocrystals using a nonaqueous sol–gel route based on the solvothermal reaction of the corresponding metal chlorides with benzyl alcohol is presented. This approach can easily be extended to the preparation of high quality Co-doped HfO2 nanoparticles of uniform size and shape and with a homogenous distribution of the magnetic ions. The structural characterization of all these nanomaterials as well as the magnetic properties of pure and doped hafnia, with special attention to the doping efficiency, are discussed. The obtained Co-doped hafnia exhibits paramagnetic properties with very weak antiferromagnetic interactions between Co ions moments.

Graphical abstract: Solvothermal and surfactant-free synthesis of crystalline Nb2O5, Ta2O5, HfO2, and Co-doped HfO2 nanoparticles

Article information

Article type
Paper
Submitted
23 Jul 2010
Accepted
28 Sep 2010
First published
26 Oct 2010

Phys. Chem. Chem. Phys., 2010,12, 15537-15543

Solvothermal and surfactant-free synthesis of crystalline Nb2O5, Ta2O5, HfO2, and Co-doped HfO2 nanoparticles

J. Buha, D. Arčon, M. Niederberger and I. Djerdj, Phys. Chem. Chem. Phys., 2010, 12, 15537 DOI: 10.1039/C0CP01298J

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