Synthesis and Characterization of TiO2-Al2O3 Nanocomposite via Sol-gel Method

Ha Thu Huong; Ho Xuan Nang; Pham Anh Tuan; Pham Thanh Huy

doi:10.51316/jca.2021.091

Authors

Ha Thu Huong Hanoi University of Science and Technology Author
Ho Xuan Nang Phenikaa University Author
Pham Anh Tuan Phenikaa University Author
Pham Thanh Huy Phenikaa University Author

DOI:

https://doi.org/10.51316/jca.2021.091

Keywords:

Nanocomposite, TiO2-Al2O3, thin film, transparent, hardness in Mohs scale

Abstract

TiO₂-Al₂O₃ nanocomposite has been successfully synthesized by a sol-gel method and eight-layers films on quartz substrates were prepared by a spin coating technique. This work investigated the effect of the Ti⁴⁺/Al³⁺ ratio and annealed temperature on the Anatase and Rutile phase transition of TiO₂in TiO₂-Al₂O₃ nanocomposite, transmittance of thin films in the visible region, and hardness of thin film. FESEM images show that the surface of the TiO₂-Al₂O₃ nanocomposite thin film at the molar ratio of TiO₂-Al₂O₃=7:3 is relatively homogeneous and crack-free with the thickness 190 nm. TiO₂-Al₂O₃ nanocomposite thin films are highly transmittance (until 90%) in the visible light shown by UV-vis spectra. XRD patterns of TiO₂-Al₂O₃nanocomposite patterns are annealed in the air at temperature from 85 to 900 ^oC revealed that, the anatase phase of TiO₂is formed at temperature of about 700 ^oC, when temperature increase to 900 ^oC, the anatase phase changes to rutile phase.

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