Título

Infrared Spectroscopy Analysis of Oxyhydroxides as Intermediate Species in the Formation of Iron Oxides-Silica Xerogels

Autor

SELINA REBECA DEL CARMEN PONCE CASTAÑEDA

SALVADOR ANTONIO PALOMARES SANCHEZ

FACUNDO RUIZ

OSCAR EDUARDO AYALA VALENZUELA

JOSE ANDRES MATUTES AQUINO

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/about/cc0/

Materias

sol-gel - (INFRARED (IR) SPECTROSCOPY) vibrating sample magnetometry - (COMPOSITES) oxyhydroxides - (SILICA XEROGEL) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) FÍSICA - (CTI) OTRAS ESPECIALIDADES FÍSICAS - (CTI) OTRAS - (CTI)

Resumen o descripción

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.

Fecha de publicación

2003

Tipo de publicación

Artículo

Versión de la publicación

Versión enviada

Recurso de información

http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1029

Formato

application/pdf

Idioma

Inglés

Repositorio Orígen

Fuente de Objetos Científicos Open Access

Descargas

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