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Issue 3, 2015
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Transparent thin films of Cu–TiO2 with visible light photocatalytic activity

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Abstract

Thin films of Cu–TiO2 with a high level of transparency were prepared by a dip-coating procedure on the glass surface. CuCl2 was used as a copper precursor added during sol–gel synthesis of TiO2. The extension of optical absorption into the visible region of as-prepared thin films was indicated by UV/Vis spectroscopy. Only the anatase phase was detected by X-ray diffraction analysis (XRD). The presence of copper in the structure of thin films was confirmed by energy dispersive X-ray spectrometry (EDS). The significant rate of phenol and 4-chlorophenol mineralization was observed during visible light irradiation. The photocatalytic activity of the prepared thin films is correlated with the optimum copper content in the structure. Copper in metallic form and cupric oxides were not detected by XRD and scanning electron microscopy analysis. It is suggested that copper may exist as dispersed ions in the TiO2 lattice.

Graphical abstract: Transparent thin films of Cu–TiO2 with visible light photocatalytic activity

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Article information


Submitted
14 Jul 2014
Accepted
24 Oct 2014
First published
24 Oct 2014

Photochem. Photobiol. Sci., 2015,14, 591-596
Article type
Paper

Transparent thin films of Cu–TiO2 with visible light photocatalytic activity

M. Janczarek, A. Zielińska-Jurek, I. Markowska and J. Hupka, Photochem. Photobiol. Sci., 2015, 14, 591
DOI: 10.1039/C4PP00271G

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