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Comparison of self-cleaning and transmittance properties between ZnO and ZnO@TiO2 core–shell nanoparticle array coating films

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Abstract

Zinc oxide (ZnO) nanoparticles (NPs) were synthesized on a fluorine-doped tin oxide (FTO) substrate by sol–gel coating and hydrothermal method to produce a film with self-cleaning and transmittance properties. To improve hydrophilic and photocatalytic activity of the film, zinc oxide titanium dioxide (ZnO@TiO2) core–shell NPs were synthesized using two different amounts of TiO2. The ZnO@TiO2 array film showed better stability and transmittance than the ZnO array film. The hydrophilicity of the ZnO@TiO2 array film was better, because its contact angle was smaller than that of ZnO array film. The wettability also increased with increasing TiO2 concentration. In addition, the ZnO@TiO2 core–shell NP array FTO film exhibited excellent photocatalytic activity in comparison with the ZnO array film. This study demonstrates that the ZnO@TiO2 core–shell NPs array FTO film is more useful due to its self-cleaning and transmittance properties.

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Authors and Affiliations

  1. Department of Chemistry, Dankook University, Cheonan, 31116, Republic of Korea

    Jeong-Yeol Yoo & Jong-Gyu Kim

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  1. Jeong-Yeol Yoo
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  2. Jong-Gyu Kim
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Correspondence to Jong-Gyu Kim.

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Yoo, JY., Kim, JG. Comparison of self-cleaning and transmittance properties between ZnO and ZnO@TiO2 core–shell nanoparticle array coating films. J. Korean Phys. Soc. 78, 559–565 (2021). https://doi.org/10.1007/s40042-021-00126-x

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  • DOI: https://doi.org/10.1007/s40042-021-00126-x

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