Hydrotalcite-TiO2 magnetic iron oxide intercalated with the anionic surfactant dodecylsulfate in the photocatalytic degradation of methylene blue dye
| Autor: | Jaderson L. Milagres, Liany D.L. Miranda, Ann H. Mounteer, Marciano F. de Almeida, Carlos Roberto Bellato, Luciano G. Moura |
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| Rok vydání: | 2015 |
| Předmět: |
Anatase
Magnesium Hydroxide Environmental Engineering Materials science Photochemistry Layered double hydroxides Inorganic chemistry Iron oxide chemistry.chemical_element Aluminum Hydroxide Management Monitoring Policy and Law Ferric Compounds Catalysis Water Purification Surface-Active Agents chemistry.chemical_compound X-Ray Diffraction TiO2 Photocatalysis Waste Management and Disposal Titanium Aqueous solution Hydrotalcite Sodium Dodecyl Sulfate General Medicine Methylene Blue chemistry Titanium dioxide Microscopy Electron Scanning Adsorption |
| Zdroj: | LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV |
| ISSN: | 0301-4797 |
| Popis: | The new magnetic photocatalysts HT/TiO2/Fe and HT-DS/TiO2/Fe, modified with the anionic surfactant sodium dodecylsulfate (DS) were successfully synthesized in this work. Titanium dioxide (anatase) followed by iron oxide were deposited on the hydrotalcite support. Several catalyst samples were prepared with different amounts of titanium and iron. The photocatalysts were characterized by infrared and Raman spectroscopy, X-ray diffraction, scanning electron microscopy. Photocatalytic performance was analyzed by UV–visible radiation (filter cutoff, λ > 300 nm) of an aqueous solution (24 mg/L) of methylene blue (MB). The most efficient catalyst was obtained at an iron oxide:TiO2 molar ratio of 2:3. This catalyst showed high photocatalytic activity, removing 96% of the color and 61% of total organic carbon from the MB solution after 120 min. It was easily removed from solution after use because of its magnetic properties. The reuse of the HT-DS/TiO2/Fe23 catalyst was viable and the catalyst was structurally stable for at least four consecutive photocatalytic cycles. |
| Databáze: | OpenAIRE |
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