Raw montmorillonite modified with iron for photo-Fenton processes: Influence of iron content on textural, structural and catalytic properties
- De León, María Andrea
- Ortiz Rodríguez, Mayra Samanta
- Marchetti, Sergio Gustavo
- Sapag, Manuel Karim
- Faccio Sgiorovello, Ricardo Juan
- Sergio, Marta
- Bussi, Juan
DOIAbstract
A raw montmorillonite was exchanged with the trinuclear Fe(III) acetate complex and calcined at 400 °C. Ratios of 0.5, 1.0 and 3.5 mmol of complex per gram of clay were employed. The pillared solids (Fe-PILCs) were analyzed by X-ray fluorescence spectroscopy, thermogravimetry analysis, scanning electron microscopy, Mössbauer spectroscopy, X-ray diffraction and nitrogen adsorption isotherms. Total iron amount incorporated by the clay increases with the complex/clay ratio used from 6.1% to 17.6%. Iron is incorporated mainly in the interlayer space when the clay is pillared with the smallest complex/clay ratio and a microporous network is generated. Adsorption of iron on the outer surface is favored for higher iron loads and results in the cre...
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