Applied Surface Science, Vol.353, 1046-1051, 2015
Pulsed laser deposition of anatase thin films on textile substrates
Pulsed laser deposition (PLD) is a highly versatile tool to prepare functional thin film coatings. In our study we utilised a Q-switched CO2 laser with a pulse duration tau approximate to 300 ns, a laser wavelength lambda = 10.59 mu m, a repetition frequency f(rep) = 800 Hz and a peak power P-peak = 15 kW to deposit crystalline anatase thin films on carbon fibre fabrics. For this purpose, preparatory experiments were performed on silicon substrates to optimise the anatase deposition conditions including the influence of different substrate temperatures and oxygen partial pressures. Processing parameters were then transferred to deposit anatase on carbon fibres. Scanning electron microscopy, X-ray diffraction analyses, Raman spectroscopy and tactile profilometry were used to characterise the samples and to reveal the formation of phase pure anatase without the occurrence of a secondary rutile phase. Methanol conversion test were used to prove the photocatalytic activity of the coated carbon fibres. (C) 2015 Elsevier B.V. All rights reserved.
Keywords:Pulsed laser deposition;Q-switched CO2 laser;Titania;Anatase;Carbon fibre fabric;Photocatalytic activity