کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1507091 993826 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of core diameter and silica content in photocatalytic activity of TiO2/SiO2/Fe3O4 composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Role of core diameter and silica content in photocatalytic activity of TiO2/SiO2/Fe3O4 composite
چکیده انگلیسی

Magnetically separable TiO2/SiO2/Fe3O4 composites of different core (Fe3O4) diameters and silica contents have been prepared by sol–gel technique for both silica and titania coatings. Energy dispersive X-ray fluorescence (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), BET surface area analysis and scanning electron microscope (SEM) have been used for characterization of prepared samples. Photocatalytic activity of the prepared samples has been investigated by photodegradation of methyl orange. Obtained results have shown that 25–45 μm core diameter exhibits the maximum activity since it possesses a convenient surface area and light transmittance. Silica content has a significant effect on the activity of composite. Silica content of more than 10 wt% has reduced the catalyst activity because of the increase in particle diameter and reduction of surface area.

Magnetically separable TiO2/SiO2/Fe3O4 composites of different core (Fe3O4) diameters and silica contents have been prepared and characterized according to the diagram. Obtained results have shown that 25–45 μm core diameter exhibits the maximum activity since it possesses a convenient surface area and light transmittance. Silica content has a significant effect on the activity of composite. Silica content of more than 10 wt% has reduced the catalyst activity because of the increase in particle diameter and reduction of surface area.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 9, Issue 8, August 2007, Pages 737–743
نویسندگان
, , , ,