Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles

Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles

The interest for core-shells has been increased in the recent years due to their improved and modifiable properties. In this work, Fe3O4-TiO2 and Fe3O4-SiO2 core-shells were successfully synthesized from an industrially produced magnetite-rich powder with micro- and nanometric particle sizes, superparamagnetic behavior and saturation magnetization of 49 emu/g. The reverse microemulsion method was used to the synthesis of these core-shells. X-ray diffraction, energy dispersive X-ray analysis, electron microscopy (SEM-TEM), and magnetization curves were used to characterize the solids. Core-shells with different morphology and size, coating of crystalline TiO2 (anatase) or amorphous silica, and superparamagnetic performance at room temperature (300 K) were obtained.

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Main Authors: Noval,Virginia E., Carriazo,Jose G.
Format: Digital revista
Language:English
Published: ABM, ABC, ABPol 2019
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300229
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spelling oai:scielo:S1516-143920190003002292019-05-06Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) MicroparticlesNoval,Virginia E.Carriazo,Jose G. Core-shell magnetite magnetic powder heterogeneous catalysis catalytic support The interest for core-shells has been increased in the recent years due to their improved and modifiable properties. In this work, Fe3O4-TiO2 and Fe3O4-SiO2 core-shells were successfully synthesized from an industrially produced magnetite-rich powder with micro- and nanometric particle sizes, superparamagnetic behavior and saturation magnetization of 49 emu/g. The reverse microemulsion method was used to the synthesis of these core-shells. X-ray diffraction, energy dispersive X-ray analysis, electron microscopy (SEM-TEM), and magnetization curves were used to characterize the solids. Core-shells with different morphology and size, coating of crystalline TiO2 (anatase) or amorphous silica, and superparamagnetic performance at room temperature (300 K) were obtained.info:eu-repo/semantics/openAccessABM, ABC, ABPolMaterials Research v.22 n.3 20192019-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300229en10.1590/1980-5373-mr-2018-0660
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Noval,Virginia E.
Carriazo,Jose G.
spellingShingle Noval,Virginia E.
Carriazo,Jose G.
Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
author_facet Noval,Virginia E.
Carriazo,Jose G.
author_sort Noval,Virginia E.
title Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
title_short Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
title_full Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
title_fullStr Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
title_full_unstemmed Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized from Industrially Processed Magnetite (Fe3O4) Microparticles
title_sort fe3o4-tio2 and fe3o4-sio2 core-shell powders synthesized from industrially processed magnetite (fe3o4) microparticles
description The interest for core-shells has been increased in the recent years due to their improved and modifiable properties. In this work, Fe3O4-TiO2 and Fe3O4-SiO2 core-shells were successfully synthesized from an industrially produced magnetite-rich powder with micro- and nanometric particle sizes, superparamagnetic behavior and saturation magnetization of 49 emu/g. The reverse microemulsion method was used to the synthesis of these core-shells. X-ray diffraction, energy dispersive X-ray analysis, electron microscopy (SEM-TEM), and magnetization curves were used to characterize the solids. Core-shells with different morphology and size, coating of crystalline TiO2 (anatase) or amorphous silica, and superparamagnetic performance at room temperature (300 K) were obtained.
publisher ABM, ABC, ABPol
publishDate 2019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300229
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AT carriazojoseg fe3o4tio2andfe3o4sio2coreshellpowderssynthesizedfromindustriallyprocessedmagnetitefe3o4microparticles
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