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Optical and Structure Properties of Nanocrystalline Titania Powders with Cu Dopant

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Abstract

TiO2 nanopowders doped by Cu were prepared by the sol–gel method. The effects of Cu doping on the structural, optical, and photo-catalytic properties of titania nanopowders have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV–Vis absorption spectroscopy. XRD results suggest that adding impurities has a significant effect on anatase phase stability, crystallinity, and particle size of TiO2. Titania rutile phase formation in the system (Ti–Cu) was promoted by Cu2+ doped TiO2. The photo-catalytic activity was evaluated by photo-catalytic degradation kinetics of aqueous methylene orange (MO) under visible radiation. The results show that the photo-catalytic activity of the 5 %Cu doped TiO2 nanopowders has a larger degradation efficiency than pure TiO 2 under visible light. Also, the minimum band gap was estimated to be ∼ 1.9–2 eV from UV–Vis spectra.

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Authors and Affiliations

  1. Department of Materials Engineering, Faculty of Engineering, Malayer University, P.O. Box: 65719-95863, Malayer, Iran

    Nasrollah Najibi Ilkhechi & Behzad Koozegar Kaleji

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  1. Nasrollah Najibi Ilkhechi
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  2. Behzad Koozegar Kaleji
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Correspondence to Nasrollah Najibi Ilkhechi.

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Ilkhechi, N.N., Kaleji, B.K. Optical and Structure Properties of Nanocrystalline Titania Powders with Cu Dopant. Silicon 9, 285–291 (2017). https://doi.org/10.1007/s12633-015-9356-x

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  • DOI: https://doi.org/10.1007/s12633-015-9356-x

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