Catalytic wet hydrogen peroxide oxidation of p-hydroxybenzoic acid over Fe/TiO2 and 0.5Ru–3Fe/TiO2
| Autor: | Zouhaier Ksibi, Tijani Hammedi, Mohamed Triki, Francisco Medina, Abdelhamid Ghorbel |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Radical Inorganic chemistry Iron oxide chemistry.chemical_element General Chemistry Thermal treatment Condensed Matter Physics Oxygen Electronic Optical and Magnetic Materials law.invention Catalysis Biomaterials chemistry.chemical_compound chemistry Physisorption law Materials Chemistry Ceramics and Composites Calcination Hydrogen peroxide |
| Zdroj: | Journal of Sol-Gel Science and Technology. 76:679-685 |
| ISSN: | 1573-4846 0928-0707 |
| Popis: | p-Hydroxybenzoic acid (p-HBZ) degradation was achieved using catalytic wet hydrogen peroxide oxidation over Fe/TiO2 and Ru–Fe/TiO2 under mild conditions. The results showed that 71 % of p-HBZ conversion was obtained after 10 min of reaction over the 0.5Ru–3Fe/TiO2 catalyst calcined under oxygen. The influence of the H2O2/p-HBZ molar ratio (5:1, 10:1 and 15:1), reaction temperature (25, 40 and 60 °C), Fe loading (1, 2 and 3 wt%) and thermal treatment was studied. Characterization studies were performed by X-ray diffraction, N2 physisorption at 77 K, H2-TPR and elemental analysis, showing that close interaction between Ru and iron oxide species is necessary to obtain active and stable catalysts. 0.5Ru–3Fe/TiO2 C catalyst shows a high activity for the degradation of p-HBZ at 60 °C by CWHPO in the presence of H2O2. The system could be considered as a Fenton-like reaction due to the generation of radicals from H2O2 as well as the presence of iron sites on the catalyst. |
| Databáze: | OpenAIRE |
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