کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1658247 1517665 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Superhydrophilicity of TiO2/SiO2 thin films: Synergistic effect of SiO2 and phase-separation-induced porous structure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Superhydrophilicity of TiO2/SiO2 thin films: Synergistic effect of SiO2 and phase-separation-induced porous structure
چکیده انگلیسی

Porous TiO2/SiO2 (TS) composite thin films with superhydrophilic performance were successfully prepared by a sol–gel process under template-free conditions. The appearance of interconnected or isolated pores for the films was discussed in relation to the phase separation in the sol–gel process with the presence of acetylacetone (AcAc) and diethanolamine (DEA). The surface topography, crystal morphology and surface chemical composition of TS films, resulting in the changes of surface wetting property, were significantly affected by the molar content of SiO2. When the SiO2 content was 20%, the as-prepared TS composite thin films exhibited the optimum superhydrophilicity with a water contact angle (WCA) 2.5° without UV irradiation, and the spreading time was less than 1 s. The natural superhydrophilicity was attributed to the synergistic effect of SiO2 and phase-separation-induced porous structure.


► Superhydrophilic porous TiO2/SiO2 films were prepared by a sol–gel process.
► Porous structure was induced by phase separation via controlling complexing agents.
► The addition of SiO2 affected the films surface topography and wetting performance.
► The film containing 20% SiO2 exhibited the optimum superhydrophilicity.
► The superhydrophilicity was ascribed to the addition of SiO2 and porous structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 213, December 2012, Pages 126–132
نویسندگان
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