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    Aerosol assisted chemical vapour deposition of hydroxyapatite-embedded titanium dioxide composite thin films 
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    Aerosol assisted chemical vapour deposition of hydroxyapatite-embedded titanium dioxide composite thin films

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    Published version
    Embargoed until: 2100-01-01
    Reason: VoR
    Volume
    332
    Pagination
    45 - 53
    Publisher
    Elsevier
    DOI
    10.1016/j.jphotochem.2016.08.010
    ISSN
    1010-6030
    Metadata
    Show full item record
    Abstract
    © 2016 Elsevier B.V.This work describes the first Aerosol Assisted Chemical Vapour Deposition (AACVD) synthesis of photocatalytic titanium dioxide thin films embedded with synthetic hydroxyapatite, [Ca10(PO4)(OH)2], nanoparticles. The hydroxyapatite nanoparticles were prepared using a low temperature continuous hydrothermal flow synthesis method; analysis of the hydroxyapatite powder showed that it was phase pure and that the as-prepared material was made up of nano-needles. The nanoparticles were then embedded into TiO2 coatings using the AACVD technique by suspending them in a solution of the titania precursor (titanium tetra-isopropoxide). Results showed that the hydroxyapatite, although present in very low concentrations in the coatings (not detectable by XRD or Raman spectroscopy), heavily affected their morphology, depending on their concentration in the precursor solution. Tests of the photocatalytic activity of the composite films showed that the inclusion of the hydroxyapatite led to an increase in methylene blue photodegradation (up to 50% higher) and that the materials were photostable. This study shows that TiO2 coatings embedded with hydroxyapatite nanoparticles have potential as highly efficient photocatalysts.
    Authors
    Piccirillo, C; Denis, CJ; Pullar, RC; Binions, R; Parkin, IP; Darr, JA; Castro, PML
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/15448
    Collections
    • Functional Nanomaterials [77]
    Licence information
    http://dx.doi.org/10.1016/j.jphotochem.2016.08.010
    Copyright statements
    © 2016 Elsevier B.V.
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