Carbon-Coated Magnetic Iron Oxide Nanoparticles as Green Catalysts for Aromatic Nitration
| Autor: | Dhinakaran Sorakka Ulaganadhan, Srikanth Adigopula, Gnanaprasanna Mudhivedu, Anitha Vasudevan, Harichandana Gownivari, Meera Parthasarathy |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science 010405 organic chemistry Mineral acid Bioengineering Environmental pollution 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences Computer Science Applications Catalysis chemistry.chemical_compound chemistry Chemical engineering Nitration General Materials Science Carbon coating Electrical and Electronic Engineering Iron oxide nanoparticles Biotechnology |
| Zdroj: | International Journal of Nanoscience. 20:2150008 |
| ISSN: | 1793-5350 0219-581X |
| Popis: | Nitration of aromatic compounds is an important industrial process, which creates significant environmental pollution because of the harsh mineral acid catalysts. In this work, we report the synthesis and application of magnetic iron oxide nanoparticles as green catalysts for aromatic nitration. Magnetic iron oxide nanoparticles were synthesized by co-precipitation method and tested for nitration reactions on selected aromatic substrates, phenol, benzaldehyde, methylbenzoate, [Formula: see text]-cresol and [Formula: see text]-cresol. For the nitration reactions, sodium nitrite was used as the nitro-source and hydrogen peroxide as the oxidant. Effect of reaction conditions like, solvent, temperature and microwave treatment were studied. The magnetic nanoparticles were found to be more stable after coating with a carbon shell by a one-pot carbonization method. The reactions were fast with good product yield under solvent-free microwave conditions. The nano-catalyst was recovered magnetically after the reaction and reused for three batches of nitration, without significant loss in catalytic activity. The nanoparticles were characterized using scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffractometry (XRD) and FTIR spectroscopy. |
| Databáze: | OpenAIRE |
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