کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1507091 | 993826 | 2007 | 7 صفحه PDF | دانلود رایگان |

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
Journal: Solid State Sciences - Volume 9, Issue 8, August 2007, Pages 737–743