Preparation and Characterization of La³⁺ Doped TiO₂ Thin Films Derived by Innovative Ultrasonic-Sol-Gel Method

Abstract:

La3+ doped TiO2 films were prepared through innovative ultrasonic-sol-gel method. The cavitation effect of ultrasound could contribute to grain refinement and uniform dispersion. The composition, structure and performance of the obtained material were characterized by XRD, SEM, FT-IR and UV-vis. Our results indicate that La3+ doping could prohibit the phase transformation of TiO2 (i.e., from anatase to rutile) and increase phase-transition temperature and restrain grain growth. The crystalling phase composition of La3+ doped TiO2 films is anatase, and the particle size is from 6 to 17 nm. In addition, La3+ doping can bring the red shift of the optical absorption edge of TiO2, and the degree of red shift increases with the increase of La3+ doping amounts and decreases with the increase of temperature. Thin film thickness is found to be 70-80nm with a smooth surface.

• Periodical: Advanced Materials Research (Volume 177)
• Pages: 96-99
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.177.96
• Online since: December 2010
• Authors: Wen Yuan Xu, Chuo Yang, Ming Biao Luo, Li Na Meng, Guo Lin Huang
• Keywords: La³⁺Doping, TiO₂ Film, Ultrasonic-Sol-Gel Method

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