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Synthesis of nanoparticulate anatase and rutile crystallites at low temperatures in the Pluronic F127 microemulsion system

Published online by Cambridge University Press:  01 January 2011

Erik Nilsson ,
Hirotoshi Furusho ,
Osamu Terasaki  and
Anders E.C. Palmqvist
Erik Nilsson*
Affiliation:
Applied Surface Chemistry, Dept. of Chemical and Biological Engineering, Chalmers University of Technology, SE 412 96 Göteborg, Sweden
Hirotoshi Furusho
Affiliation:
Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE 106 91 Stockholm, Sweden
Osamu Terasaki
Affiliation:
Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE 106 91 Stockholm, Sweden; and Graduate School of EEWS (WCU), KAIST, Daejeon 305-701, Republic of Korea
Anders E.C. Palmqvist*
Affiliation:
Applied Surface Chemistry, Dept. of Chemical and Biological Engineering, Chalmers University of Technology, SE 412 96 Göteborg, Sweden
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

A low-temperature synthesis method for preparing nanosized TiO2 crystallites has been developed based on a Pluronic F127 microemulsion system. Both anatase and rutile polymorphs can be prepared, and there exists a temperature window between 40 and 50 °C where the formation of rutile is favored over anatase. At 60 °C and above, anatase is kinetically favored and only very slowly transforms to rutile at 60 °C. The results differ from previous observations regarding formation kinetics and temperature range for rutile formation as well as in the microscopic aggregation of the formed nanoparticles. This development of a low-temperature synthesis of crystalline titania nanoparticles within the Pluronic block copolymer system is an important and enabling step toward devising a direct synthesis route for the formation of ordered mesoporous and crystalline titania.

Type
Reviews
Information
Journal of Materials Research , Volume 26 , Issue 2: Focus Issue: Self-Assembly and Directed Assembly of Advanced Materials , 28 January 2011 , pp. 288 - 295
Copyright
Copyright © Materials Research Society 2011

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