Morphology, structure and photowettability of TiO2 coatings doped with copper and fluorine
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier BV
Abstract
The work reports synthesis, structure and properties of doubly doped titanium dioxide coatings activated by
ultraviolet and visible light. Copper within a concentration range of 0.4–3.4 at% and fluorine within a concentration range of 1.7–9.4 at% were introduced as dopants. The coatings were prepared with the help of
radiofrequency plasma enhanced chemical vapor deposition technique with a single precursor compound providing both dopants and titanium (IV) chloride being a source of titanium. Elemental composition and chemical
bonding analyses of the coatings were carried out with the help of X-ray photoelectron spectroscopy. The results
indicate that both admixtures are chemically bound to the TiO2 matrix – a notion confirmed by Fourier transform infrared spectroscopy. Phase composition studies, performed with a low angle X-ray diffraction method,
revealed a presence of a threshold concentration of the dopants affecting the coatings crystallinity. Surface
morphology and its topography were studied with the help of scanning electron microscopy and atomic force
microscopy. Several coatings exhibited a superhydrophilic effect upon relatively short time of illumination.
Description
Subject(s)
Cu and F doped TiO2, RF PECVD method, Rutile, Photo-wetting, Optical properties
Citation
ISSN
0272-8842