Iron exchanged natural mordenite: UV-Vis diffuse reflectance and Mössbauer spectroscopy characterisation
| Autor: | Daria Tito-Ferro, A. Pentón-Madrigal, Inocente Rodríguez-Iznaga, Gloria Berlier, Fernando Chávez-Rivas, Vitalii Petranovskii, Beatriz Concepción-Rosabal, Felipe F. Castillón-Barraza |
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| Rok vydání: | 2016 |
| Předmět: |
Analytical chemistry
Bioengineering 010402 general chemistry 01 natural sciences Mordenite Ultraviolet visible spectroscopy Mössbauer spectroscopy Materials Chemistry UV–Vis diffuse reflectance zeolite Electrical and Electronic Engineering Zeolite natural mordenite Valence (chemistry) 010405 organic chemistry Chemistry iron exchange Cationic polymerization Condensed Matter Physics 0104 chemical sciences Crystallography FTIR Octahedron Mössbauer Diffuse reflection |
| Zdroj: | International Journal of Nanotechnology. 13:112 |
| ISSN: | 1741-8151 1475-7435 |
| DOI: | 10.1504/ijnt.2016.074528 |
| Popis: | Purified natural mordenite (ZP) from Palmarito de Cauto deposit, Cuba, was modified with Fe2+ and Fe3+cations through ion-exchange in acid medium and characterised by UV-Vis diffuse reflectance, FTIR and Mossbauer spectroscopies. Fe2+ exchange is less favoured than Fe3+ exchange, which may be due to higher Fe3+ valence. In the Fe2+ exchanged samples, Fe2+ZP, all incorporated Fe2+ is found in octahedral coordination and it should be mainly in cationic extra-framework positions inside mordenite channels as a charge compensating cation. In the case of the Fe3+ exchanged samples, Fe3+ZP, the incorporated Fe3+ is present in both octahedral and tetrahedral coordination and it can be in both cationic extra-frameworks positions as a charge compensating cation and in form of oxy-hydroxides originated by Fe3+ hydrolysis. |
| Databáze: | OpenAIRE |
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