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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*
Applied Surface Chemistry, Dept. of Chemical and Biological Engineering, Chalmers University of Technology, SE 412 96 Göteborg, Sweden
Hirotoshi Furusho
Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE 106 91 Stockholm, Sweden
Osamu Terasaki
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*
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:
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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.

Copyright © Materials Research Society 2011

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