Enhanced Self-Cleaning Performance of Ag-F-Codoped TiO2/SiO2 Thin Films

Byeong-Min Kim; Jung-Sik Kim

doi:10.3740/MRSK.2018.28.11.620

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Enhanced Self-Cleaning Performance of Ag-F-Codoped TiO₂/SiO₂ Thin Films

November 2018. pp. 620-626

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Abstract

Highly self-cleaning thin films of TiO₂-SiO₂ co-doped with Ag and F are prepared by the sol-gel method. The asprepared thin films consist of bottom SiO₂ and top TiO₂ layers which are modified by doping with F, Ag and F-Ag elements. XRD analysis confirms that the prepared thin film is a crystalline anatase phase. UV-vis spectra show that the light absorption of Ag-F-TiO₂/SiO₂ thin films is tuned in the visible region. The self-cleaning properties of the prepared films are evaluated by a water contact angle measurement under UV light irradiation. The photocatalytic performances of the thin films are studied using methylene blue dye under both UV and visible light irradiation. The Ag-F-TiO₂/SiO₂ thin films exhibit higher photocatalytic activity under both UV and visible light compared with other samples of pure TiO₂, Ag-doped TiO₂, and F-doped TiO₂ films.

Keywords

photocatalyst

titanium dioxide

Ag-F-TiO₂ film

self-cleaning

sol-gel process

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 28
No :11
Pages :620-626
Received Date : 2018-10-02
Revised Date : 2018-10-02
Accepted Date : 2018-10-23
DOI :https://doi.org/10.3740/MRSK.2018.28.11.620

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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