کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5464672 | 1517567 | 2017 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and photocatalytic property of TiO2 and Fe3Â +:TiO2 films produced by micro-arc oxidation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
First, the TiO2 films prepared by micro-arc oxidation (MAO) were formed in phosphate based electrolyte on pure titanium; after that, they were impregnated with Fe3Â +-containing electrolyte to produce the Fe3Â +:TiO2 composite films. Effects of the applied current density and impregnation time and concentration on physical and chemical properties of TiO2 and Fe3Â +:TiO2 composite films were investigated by Scanning electron microscopy (SEM), stereoscopic microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS). A UV-vis spectrophotometer was also used to study photocatalytic properties of both films. It is indicated that the film formed in phosphate-based electrolyte were composed of anatase phase with varying fraction depending on the applied current density. XPS results revealed that Ti2p spin-orbit components of Fe3Â +:TiO2 composite films are shifted towards higher binding energy, with respect to TiO2 films, suggesting that some of the Fe3Â + ions are incorporated into TiO2 lattice. Photocatalytic activity of the films was studied by measuring the degradation rate of methylene blue on their surface under simulated sunlight irradiation. The Fe3Â +:TiO2 composite films showed an obvious enhanced photocatalytic activity than the pure layers under UV-irradiation, while their photocatalytic degradation was much higher than that of the TiO2 film under the irradiation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 315, 15 April 2017, Pages 196-204
Journal: Surface and Coatings Technology - Volume 315, 15 April 2017, Pages 196-204
نویسندگان
Y. Zhang, W. Fan, H.Q. Du, Y.W. Zhao, R.G. Song, N. Xiang,