Bentonites impregnated with TiO2 for photodegradation of methylene blue
| Autor: | João Henrique Zimnoch dos Santos, Diego Ivan Petkowicz, Sibele B. C. Pergher, Fábio Garcia Penha, Enéderson Rossetto |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Bentonites Diffuse reflectance infrared fourier transform Titanium oxide Scanning electron microscope Inorganic chemistry Infrared spectroscopy Geology chemistry.chemical_compound chemistry Geochemistry and Petrology Elemental analysis Titanium dioxide Photodegradation Diatomites Methylene blue Nuclear chemistry |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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