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Effect of ytterbium doping concentration on structural, optical and photocatalytic properties of TiO2 thin films

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Abstract Ytterbium (Yb) doped TiO 2 thin films have been synthesized by sol-gel spin-coating technique. Films with different Yb concentrations such as 0.5, 1, 2, 4 wt% were deposited and the… Click to show full abstract

Abstract Ytterbium (Yb) doped TiO 2 thin films have been synthesized by sol-gel spin-coating technique. Films with different Yb concentrations such as 0.5, 1, 2, 4 wt% were deposited and the impact of the dopant concentration on their physicochemical properties was evaluated. The films were characterized by X-Ray diffraction, transmission electron microscopy, Raman spectroscopy, UV–Vis transmittance spectroscopy and photoresponse. The results showed that the incorporation of ytterbium modified the properties of TiO 2 films. The photocatalytic efficiency of TiO 2 :Yb films was determined using methylene blue (MB) as the generic pollutant. Compared to undoped TiO 2 , 1 wt% Yb doped films exhibited higher photocatalytic activity toward MB degradation under UV light. When the amount of Yb dopant concentration was increased, there was a negative effect on the photosensitivity and photocatalysis.

Keywords: ytterbium; thin films; effect ytterbium; spectroscopy; concentration

Journal Title: Ceramics International
Year Published: 2017

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