Title: Synthesis of Neutral SiO2/TiO2 Hydrosol and Its Application as Antireflective Self-Cleaning Thin Film
Authors: Huang, Chiahung
Bai, Hsunling
Huang, Yaoling
Liu, Shuling
Yen, Shaoi
Tseng, Yaohsuan
Institute of Environmental Engineering
Issue Date: 2012
Abstract: A neutral SiO2/TiO2 composite 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 degrees C for 5 minutes in the tempering process, the as-prepared SiO2/TiO2 thin film still demonstrated antireflection and photocatalytic self-cleaning effect. The SiO2/TiO2 thin film increased near 2% of transmittance; however, the TiO2 thin film decreased 5% of transmittance at least. In addition to antireflection, the SiO2/TiO2 thin film decomposed the surface coated oleic acid under ultraviolet light and showed superhydrophilicity under dark for two days. The SiO2/TiO2 thin film also showed good photocatalytic degradation of methylene blue. With these antireflection, persistent superhydrophilicity, and photocatalytic self-cleaning effects, this prepared neutral SiO2/TiO2 hydrosol would be a good coating material for tempered glass and other building materials.
URI: http://hdl.handle.net/11536/16558
ISSN: 1110-662X
DOI: 620764
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