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    Phase transformations and crystallization kinetics in electrospun TiO2 nanofibers in air and argon atmospheres

    213353_213353.pdf (7.803Mb)
    Access Status
    Open access
    Authors
    Albetran, Hani Manssor Mohammed
    Haroosh, Hazim Jasim Mohammed
    Dong, Yu
    Prida, V.
    O'Connor, Brian
    Low, It Meng
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Albetran, H. and Haroosh, H. and Dong, Y. and Prida, V.M. and O'Connor, B.H. and Low, I.M. 2014. Phase transformations and crystallization kinetics in electrospun TiO2 nanofibers in air and argon atmospheres. Applied Physics A. 116 (1): pp. 161-169.
    Source Title
    Applied Physics A
    DOI
    10.1007/s00339-014-8246-1
    ISSN
    0947-8396
    School
    Department of Physics and Astronomy
    Remarks

    The final publication is available at Springer via http://doi.org/10.1007/s00339-014-8246-1

    URI
    http://hdl.handle.net/20.500.11937/23519
    Collection
    • Curtin Research Publications
    Abstract

    The effects of atmospheric air and argon environments on thermal-induced phase transformations in electrospun TiO2 nanofibers have been investigated in situ using synchrotron radiation diffraction. Diffraction results showed that the as-synthesized TiO2 nanofibers were initially amorphous, but crystallized to form anatase and rutile after thermal annealing in air or argon at elevated temperatures. The crystallization temperature of anatase was delayed by 100 °C in argon relative to in air, and the transformation of anatase into rutile occurs faster in argon atmosphere than in air due to the formation of oxygen vacancies. Non-linear strains formed in both polymorphs and the substantial elevation of rutile thermal expansion pointed to strain anisotropy in the rutile phase and the concomitant fibre breakage.

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