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Hybrid chemical vapour and nanoceramic aerosol assisted deposition for multifunctional nanocomposite thin films

DOI: 10.1016/j.tsf.2011.03.028 DOI Help

Authors: Michael E. A. Warwick (University College London, U.K.) , Charles W. Dunnill (University College London, U.K.) , Josie Goodall (University College London, U.K.) , Jawwad A. Darr (University College London, U.K.) , Russell Binions (University College London, U.K.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Thin Solid Films , VOL 519 (18) , PAGES 5942 - 5948

State: Published (Approved)
Published: July 2011

Abstract: Hybrid atmospheric pressure chemical vapour and aerosol assisted deposition via the reaction of vanadium acetylacetonate and a suspension of preformed titanium dioxide or cerium dioxide nanoparticles, led to the production of vanadium dioxide nanocomposite thin films on glass substrates. The preformed nanoparticle oxides used for the aerosol were synthesised using a continuous hydrothermal flow synthesis route involving the rapid reaction of a metal salt solution with a flow of supercritical water in a flow reactor. Multifunctional nanocomposite thin films from the hybrid deposition process were characterised using scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The functional properties of the films were evaluated using variable temperature optical measurements to assess thermochromic behaviour and methylene blue photodecolourisation experiments to assess photocatalytic activity. The tests show that the films are multifunctional in that they are thermochromic (having a large change in infra-red reflectivity upon exceeding the thermochromic transition temperature) and have significant photocatalytic activity under irradiation with 254 nm light.

Journal Keywords: Composites; Titanium dioxide; Cerium oxide; Vanadium dioxide; Thermochromism; Photocatalysis; Chemical Vapour Deposition

Subject Areas: Chemistry

Instruments: I11-High Resolution Powder Diffraction