Artículo
Synthesis of Fe2SiO4-Fe7Co3 nanocomposite dispersed in the mesoporous SBA-15: Application as magnetically separable adsorbent
Da Silva, Monickarla Teixeira Pegado; Barbosa, Felipe Fernandes; Morales Torre, Marco Antonio; Villarroel Rocha, Jhonny
; Sapag, Manuel Karim
; Pergher, Sibele; Braga, Tiago Pinheiro
Fecha de publicación:
02/2020
Editorial:
Molecular Diversity Preservation International
Revista:
Molecules
ISSN:
1420-3049
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The mixture containing alloy and oxide with iron-based phases has shown interesting properties compared to the isolated species and the synergy between the phases has shown positive effect on dye adsorption. This paper describes the synthesis of Fe2SiO4-Fe7Co3-based nanocomposite dispersed in Santa Barbara Amorphous (SBA)-15 and its application in dye adsorption followed by magnetic separation. Thus, it was studied the variation of reduction temperature and amount of hydrogen used in synthesis and the effect of these parameters on the physicochemical properties of the iron and cobalt based oxide/alloy mixture, as well as the methylene blue adsorption capacity. The XRD and Mössbauer results, along with the temperature-programmed reduction (TPR) profiles, confirmed the formation of Fe2SiO4-Fe7Co3-based nanocomposites. Low-angle XRD, N2 isotherms, and TEM images show the formation of the SBA-15 based mesoporous support with a high surface area (640 m2/g). Adsorption tests confirmed that the material reduced at 700 ◦C using 2% of H2 presented the highest adsorption capacity (49 mg/g). The nanocomposites can be easily separated from the dispersion by applying an external magnetic field. The interaction between the dye and the nanocomposite occurs mainly by π-π interactions and the mixture of the Fe2SiO4 and Fe7Co3 leads to a synergistic effect, which favor the adsorption.
Palabras clave:
ADSORPTION
,
DYES
,
FE2SIO4 OXIDE
,
FE7CO3 ALLOY
,
MAGNETIC NANOCOMPOSITE
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INFAP)
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Citación
Da Silva, Monickarla Teixeira Pegado; Barbosa, Felipe Fernandes; Morales Torre, Marco Antonio; Villarroel Rocha, Jhonny; Sapag, Manuel Karim; et al.; Synthesis of Fe2SiO4-Fe7Co3 nanocomposite dispersed in the mesoporous SBA-15: Application as magnetically separable adsorbent; Molecular Diversity Preservation International; Molecules; 25; 4; 2-2020; 1-24; 1016
Compartir
Altmétricas