Formation and Gelation of Titania Nanoparticles from AOT Reverse Micelles

P D Moran; John R Bartlett; J L Woolfrey; G A Bowmaker; R P Cooney

doi:10.1007/BF02436819

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Formation and Gelation of Titania Nanoparticles from AOT Reverse Micelles

Journal article

Peer reviewed

Formation and Gelation of Titania Nanoparticles from AOT Reverse Micelles

P D Moran, John R Bartlett, J L Woolfrey, G A Bowmaker and R P Cooney

Journal of Sol-Gel Science and Technology, Vol.8(1-3), pp.65-69

1997

DOI: https://doi.org/10.1007/BF02436819

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Abstract

Materials Engineering

nanocrystalline titania powder

microemulsions

reverse micelles

AOT

Titania nanoparticles have been produced by the controlled hydrolysis of tetraisopropyltitanate (TPT) in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles. Particle formation and aggregation were investigated by static and dynamic light scattering and the chemical species by vibrational spectroscopy. The kinetics of particle formation and aggregation were controlled by varying [H2O]/[AOT] (w0), [H2O]/[Ti(IV)] and [AOT]/[Ti(IV)]. Nanoparticles, with diameters <10 nm, could be produced at relatively high Ti(IV) concentrations (up to 0.05 M). These nanoparticles aggregated into sols, with colloid sizes of 20 to 200 nm, eventually forming gelatinous precipitates. Different titania phases were produced, depending on the size of the micellar water pool; small pools (w0 < 6) yielded amorphous particles, while larger pools (w0 > 10) produced anatase.

Details

Title: Formation and Gelation of Titania Nanoparticles from AOT Reverse Micelles
Authors: P D Moran (Author) - University of Auckland, New Zealand
John R Bartlett (Author) - Australian Nuclear Science and Technology Organisation Materials Division
J L Woolfrey (Author) - Australian Nuclear Science and Technology Organisation Materials Division
G A Bowmaker (Author) - University of Auckland, New Zealand
R P Cooney (Author) - University of Auckland, New Zealand
Publication details: Journal of Sol-Gel Science and Technology, Vol.8(1-3), pp.65-69
Publisher: Springer New York LLC
Date published: 1997
DOI: 10.1007/BF02436819
ISSN: 0928-0707
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448838802621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Materials Science, Ceramics