Preparation of highly stable superhydrophobic TiO2 surfaces with completely suppressed photocatalytic activity |
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| Authors: | Kwang-Dae Kim Hyun Ook Seo Chae Won Sim Myung-Geun Jeong Young Dok Kim Dong Chan Lim |
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| Affiliation: | 1. Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. Materials Processing Division, Korea Institute of Materials Science, Changwon 641-010, Republic of Korea |
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| Abstract: | TiO2 nanoparticles with a mean size of 20–30 nm were covered by ultrathin polydimethylsiloxane (PDMS) film, which shows hydrophobic properties. Surfaces consisting of the PDMS-coated TiO2 particles showed water contact angles close to 170°. In contrast to the hydrophobic films consisting of organic molecules, which can be photocatalytically decomposed on TiO2 in the presence of UV light, PDMS-coating on TiO2 was highly stable. The PDMS-coating completely suppressed the photocatalytic activity of TiO2. The unique properties of PDMS-coating can be exploited for UV protection layer and self-cleaning surfaces. |
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| Keywords: | Superhydrophobicity Polydimethylsiloxane coating Photocatalysis TiO2 Nanostructures |
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