کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1695735 | 1011873 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Bentonites impregnated with TiO2 for photodegradation of methylene blue Bentonites impregnated with TiO2 for photodegradation of methylene blue](/preview/png/1695735.png)
Four bentonites and one diatomite from Rio Negro (Argentina) were used as supports for titanium oxide (TiO2). The materials were characterized by X-ray diffraction, scanning electron microscopy, infrared spectroscopy, textural analysis by nitrogen adsorption, elemental analysis and diffuse reflectance spectroscopy. The specific surface areas calculated by the BET method were 76, 46, 80, and 31 for the bentonites and 153 m2/g for diatomite and were not changed by impregnation with TiO2. SEM analysis revealed agglomerates, probably due to titania domains on the surface. The properties of the lamellar materials were maintained after TiO2 impregnation, and all materials showed methylene blue photodegradation activity. The bentonites showed a higher activity than the commercial catalyst P25, likely due to the TiO2 distribution and better accessibility.
Journal: Applied Clay Science - Volume 48, Issue 4, May 2010, Pages 602–606