Synthesis of Neutral / Hydrosol and Its Application as Antireflective Self-Cleaning Thin Film

International Journal of Photoenergy - Tập 2012 - Trang 1-8 - 2012
Chia-Hung Huang1,2, Hsunling Bai2, Yaoling Huang1, Shuling Liu1, Shaoi Yen1, Yao‐Hsuan Tseng3
1Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan
2Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
3Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan

Tóm tắt

A neutral SiO2/TiO2composite hydrosol was prepared by a coprecipitation-peptization method using titanium tetrachloride and silicon dioxide hydrosol as precursors. It is not only an antireflective self-cleaning coating material but also an environmental-benign material. Even heated at 700°C for 5 minutes in the tempering process, the as-prepared SiO2/TiO2thin film still demonstrated antireflection and photocatalytic self-cleaning effect. The SiO2/TiO2thin film increased near 2% of transmittance; however, the TiO2thin film decreased 5% of transmittance at least. In addition to antireflection, the SiO2/TiO2thin film decomposed the surface coated oleic acid under ultraviolet light and showed superhydrophilicity under dark for two days. The SiO2/TiO2thin film also showed good photocatalytic degradation of methylene blue. With these antireflection, persistent superhydrophilicity, and photocatalytic self-cleaning effects, this prepared neutral SiO2/TiO2hydrosol would be a good coating material for tempered glass and other building materials.

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International Journal of Photoenergy

Tập 2012

1-8

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