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Synthesis of nanometric TiO2 in aqueous solution by soft chemistry: obtaining of anatase, brookite and rutile with controlled shapes

Published online by Cambridge University Press:  03 September 2012

Magali Koelsch ,
Sophie Cassaignon  and
Jean-Pierre Jolivet
Magali Koelsch
Affiliation:
Laboratoire de Chimie de la Matière Condensée, UMR-CNRS 7574 Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris Cédex 05, France
Sophie Cassaignon
Affiliation:
Laboratoire de Chimie de la Matière Condensée, UMR-CNRS 7574 Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris Cédex 05, France
Jean-Pierre Jolivet
Affiliation:
Laboratoire de Chimie de la Matière Condensée, UMR-CNRS 7574 Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris Cédex 05, France
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Abstract

Nanometric particles of titania, exhibiting anatase, brookite or rutile polymorphs, were synthesized by thermohydrolysis of TiCl4 in aqueous medium. The adjustement of physico-chemical parameters (acidity, ionic strength, anions, temperature) allows to tune the crystalline structure, the size and the morphology of the particles. Brookite results from the precipitation of titanium in HCl, HBr or HNO3 whereas anatase is formed in H2SO4 medium. Adding salts in HCl medium leads to ionic strength or complexation effect. Varying the temperature of thermohydrolysis implies modification on yield, size and morphology of the particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 822: Symposium S – Nanostructured Materials in Alternative Energy Devices , 2004 , S5.3
Copyright
Copyright © Materials Research Society 2004

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