Piccirillo, C;
Denis, CJ;
Pullar, RC;
Binions, R;
Parkin, IP;
Darr, JA;
Castro, PML;
(2017)
Aerosol assisted chemical vapour deposition of hydroxyapatite-embedded titanium dioxide composite thin films.
Journal of Photochemistry and Photobiology A: Chemistry
, 332
pp. 45-53.
10.1016/j.jphotochem.2016.08.010.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Aerosol assisted chemical vapour deposition of hydroxyapatite-embedded titanium dioxide composite thin films |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jphotochem.2016.08.010 |
| Publisher version: | http://dx.doi.org/10.1016/j.jphotochem.2016.08.010 |
| Language: | English |
| Additional information: | © 2016. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0. Access may be initially restricted by the publisher. |
| Keywords: | Science & Technology, Physical Sciences, Chemistry, Physical, Chemistry, Hydroxyapatite, Titanium Dioxide, Chemical Vapour Deposition, Photocatalysis, Continuous Hydrothermal Synthesis, Photocatalytic Degradation, Flow Synthesis, Modified Tio2, Oxidation, Nanoparticles, Coatings, Nanocomposites, Oxides, XPS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1533260 |
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