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    X-Ray Diffraction Study on the In-Situ Crystallisation Kinetics in Electrospun PVP/TiO2 Nanofibers

    Access Status
    Fulltext not available
    Authors
    Albetran, Hani
    Alsafwan, Asmahan
    Haroosh, Hazim
    Dong, Yu
    Low, It Meng
    Date
    2014
    Type
    Conference Paper
    
    Metadata
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    Citation
    Albetran, H. and Alsafwan, A. and Haroosh, H. and Dong, Y. and Low, I.M. 2014. X-ray diffraction study on the in-situ crystallisation kinetics in electrospun PVP/TiO2 nanofibers, in S. Mathur, F. Hernandez-Ramirez (ed), Nanostructured materials and nanotechnology VII. Ceramic Engineering and Science Proceedings. 34 (7), pp. 35-49.
    Source Title
    Nanostructured Materials and Nanotechnology VII: Ceramic Engineering and Science Proceedings,Volume 34, Issue 7
    Source Conference
    The 7th International Symposium on Nanostructured Materials and Nanocomposites at the 37th International Conference and Expo on Advanced Ceramics and Composites (ICACC’13)
    ISBN
    978-1-118-80762-0
    Remarks

    This CESP issue contains papers presented at the 7th International Symposium on Nanostructured Materials and Nanocomposites, held during the 37th International Conference and Exposition on Advanced Ceramics and Composites, Jan 27 – Feb 1 2013, Daytona Beach, Florida. Copyright © 2014 The American Ceramic Society.

    URI
    http://hdl.handle.net/20.500.11937/3045
    Collection
    • Curtin Research Publications
    Abstract

    Nanostructured TiO2 has received much attention recently owing to their promising physical properties for photocatalytic applications. The process of photocatalysis is closely related to the electronic band gap which is controlled by shape, surface area and particle size. Elongated structures such as nanofibres are of particular importance because they can provide a high specific surface area for photocatalysis. In this paper, the effect of atmosphere and doping on the crystallisation kinetics of electrospun TiO2 nanofibers has been investigated using high-temperature synchrotron radiation diffraction. Electrospun TiO2 nanofibers were synthesized using titanium isopropoxide, poly (vinyl-pyrrolidone) as a polymer binder, and acetic acid and ethanol as a solvent. Diffraction results showed that the as-synthesized TiO2 nanofibres were amorphous initially but when heated in air they crystallized to form anatase and rutile at 600 °C and 700 °C respectively. However, in argon atmosphere, anatase and rutile formed simultaneously at 700 °C. In the presence of vanadium dopant, both anatase and rutile formed in concert at 500 °C. The effects of atmosphere and doping on the crystallisation kinetics and phase stability of TiO2 nanofibres at elevated temperature are discussed.

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