Iron oxide nanoparticles inside the MCM-41 channels: Study of the structural stability of the support
- Bengoa, Jose Fernando
- Cagnoli, Maria Virginia
- Gallegos, Norma Graciela
- Alvarez, Ana María
- Mogni, Liliana Verónica
- Moreno, Mario Sergio Jesus
- Marchetti, Sergio Gustavo
DOIAbstract
We report the synthesis of the MCM-41 mesoporous solid chosen as support of Fe nanoparticles, which yields a narrow distribution of oxide crystal sizes. MCM-41 was synthesized in two different ways, with and without pH adjustment during the synthesis process, and impregnated by different methods with iron salts. They were characterized by atomic absorption spectroscopy, N2 adsorption, X-ray diffraction, Mössbauer spectroscopy, high-resolution scanning transmission electron microscopy equipped with a high-angle annular dark-field detector, high-resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. When the support was synthesized without pH adjustment the preparation steps of the supported system, the water de...
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