Natural α-Fe2 O3 as an efficient catalyst for the p-nitrophenol reduction
| Autor: | Laaldja Meddour-Boukhobza, Saleh Chegrouche, Daria C. Boffito, Federico Galli, Mohamed Sennour, Amar Djadoun, Amal Elfiad |
|---|---|
| Přispěvatelé: | Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Natural hematite Materials science Reducing agent Synthetic hematite 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Catalysis law.invention 4 nitrophenol reduction Nitrophenol chemistry.chemical_compound law Desorption General Materials Science Calcination Water treatment Mechanical Engineering Hematite 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Mechanics of Materials visual_art engineering visual_art.visual_art_medium [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Noble metal 0210 nano-technology Nuclear chemistry |
| Zdroj: | Materials Science and Engineering: B Materials Science and Engineering: B, Elsevier, 2018, 229, pp.126-134. ⟨10.1016/j.mseb.2017.12.009⟩ |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2017.12.009⟩ |
| Popis: | International audience; 4 nitrophenol (4-NP) is a recalcitrant water pollutant. It reduces to 4 aminophenol (4-AP), which is a less harmful compound. Typically, a noble metal catalyzes this reaction. However, its preparation is complex and expensive. Here, for the first time, we test hematite either from natural goethite calcination and compared with a synthetic hematite prepared by citrate or traditional precipitation method. We characterize the catalysts by thermo gravimetric analysis (TGA), X-ray fluorescence (XRF), X-ray diffraction (XRD) transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), particle size distribution (PSD), and nitrogen adsorption desorption at 77 K. 4-NP reacted in presence of NaBH4 as the reducing agent to 4-AP. Kinetic study and catalyst stability were performed. Particle morphology played an important role in the reaction. All samples exhibited high catalytic activity with first order kinetic constants of 0.024, 0.027, 0.037 s−1 for natural α-Fe2O3, hematite prepared by precipitation, and citrate method, respectively. |
| Databáze: | OpenAIRE |
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