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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1029| Infrared Spectroscopy Analysis of Oxyhydroxides as Intermediate Species in the Formation of Iron Oxides-Silica Xerogels | |
| SELINA REBECA DEL CARMEN PONCE CASTAÑEDA SALVADOR ANTONIO PALOMARES SANCHEZ FACUNDO RUIZ OSCAR EDUARDO AYALA VALENZUELA JOSE ANDRES MATUTES AQUINO | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| sol-gel vibrating sample magnetometry oxyhydroxides | |
| A detailed infrared spectroscopy analysis in the 2500 to 3800 cm−1 region has been used to study the formation of species in samples of iron oxides embedded in silica xerogel matrix.We report the presence of α, β, and γ forms of iron oxyhydroxides as intermediate species in the formation of α-Fe2O3, γ -Fe2O3 and ε-Fe2O3 starting from three different iron precursors: iron nitrate, iron chloride and nanometric Fe particles prepared by chemical reduction. Our results show that under thermal dehydration α and γ forms of iron oxyhydroxides transform into hematite and maghemite, respectively, whereas the β form transform to the ε-Fe2O3 without going through an intermediate iron oxide phase. | |
| 2003 | |
| Artículo | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos |
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| Infrared Spectroscopy Analysis of Oxyhydroxides as Intermediate Species in the Formation of Iron Oxides PDF 2003.pdf | 521.43 kB | Adobe PDF | Visualizar/Abrir |