skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetically separable mesoporous Fe{sub 3}O{sub 4}/silica catalysts with very low Fe{sub 3}O{sub 4} content

Abstract

Two magnetically separable Fe{sub 3}O{sub 4}/SiO{sub 2} (aerogel and MSU-X) composites with very low Fe{sub 3}O{sub 4} content (<1 wt%) have been successfully prepared at room temperature by co-condensation of MPTES-functionalized Fe{sub 3}O{sub 4} nanoparticles (NPs) with a silicon alkoxide. This procedure yields a homogeneous incorporation of the Fe{sub 3}O{sub 4} NPs on silica supports, leading to magnetic composites that can be easily recovered using an external magnetic field, despite their very low Fe{sub 3}O{sub 4} NPs content (ca. 1 wt%). These novel hybrid Fe{sub 3}O{sub 4}/SiO{sub 2} materials have been tested for the oxidation reaction of 3,3′,5,5′-tetramethylbenzidine (TMB) with hydrogen peroxide showing an enhancement of the stability of the NPs in the Fe{sub 3}O{sub 4}/silica aerogel as compared to the Fe{sub 3}O{sub 4} NPs alone, even after five catalytic cycles, no leaching or agglomeration of the Fe{sub 3}O{sub 4}/SiO{sub 2} systems. - Graphical abstract: Novel magnetically separable mesoporous silica-based composites with very low magnetite content. - Highlights: • An innovative way to prepare magnetically separable composites with <1 wt% NPs. • The Fe{sub 3}O{sub 4}/silica composites are readily magnetized/demagnetized. • The Fe{sub 3}O{sub 4}/silica composites can be easily recovered using an external magnetic field. • Excellent catalytic performance andmore » recyclability despite the low Fe{sub 3}O{sub 4} NPs content.« less

Authors:
; ;  [1];  [2]
  1. Molecular Nanotechnology Laboratory, Department of Inorganic Chemistry, University of Alicante, Carretera San Vicente s/n, E-03690 Alicante (Spain)
  2. Department of Engineering Sciences, Uppsala University, Box 534, SE-75121 Uppsala (Sweden)
Publication Date:
OSTI Identifier:
22584065
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 237; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALKOXIDES; CATALYSTS; COMPARATIVE EVALUATIONS; FERRITES; GELS; HYBRIDIZATION; HYDROGEN; HYDROGEN PEROXIDE; IRON OXIDES; MAGNETIC FIELDS; MAGNETITE; NANOPARTICLES; NANOSTRUCTURES; OXIDATION; PEROXIDASES; POROUS MATERIALS; SILICA; SILICON; SILICON OXIDES; TEMPERATURE RANGE 0273-0400 K

Citation Formats

Grau-Atienza, A., Serrano, E., Linares, N., Svedlindh, P., Seisenbaeva, G., E-mail: Gulaim.Seisenbaeva@slu.se, and García-Martínez, J., E-mail: j.garcia@ua.es. Magnetically separable mesoporous Fe{sub 3}O{sub 4}/silica catalysts with very low Fe{sub 3}O{sub 4} content. United States: N. p., 2016. Web. doi:10.1016/J.JSSC.2015.12.026.
Grau-Atienza, A., Serrano, E., Linares, N., Svedlindh, P., Seisenbaeva, G., E-mail: Gulaim.Seisenbaeva@slu.se, & García-Martínez, J., E-mail: j.garcia@ua.es. Magnetically separable mesoporous Fe{sub 3}O{sub 4}/silica catalysts with very low Fe{sub 3}O{sub 4} content. United States. https://doi.org/10.1016/J.JSSC.2015.12.026
Grau-Atienza, A., Serrano, E., Linares, N., Svedlindh, P., Seisenbaeva, G., E-mail: Gulaim.Seisenbaeva@slu.se, and García-Martínez, J., E-mail: j.garcia@ua.es. 2016. "Magnetically separable mesoporous Fe{sub 3}O{sub 4}/silica catalysts with very low Fe{sub 3}O{sub 4} content". United States. https://doi.org/10.1016/J.JSSC.2015.12.026.
@article{osti_22584065,
title = {Magnetically separable mesoporous Fe{sub 3}O{sub 4}/silica catalysts with very low Fe{sub 3}O{sub 4} content},
author = {Grau-Atienza, A. and Serrano, E. and Linares, N. and Svedlindh, P. and Seisenbaeva, G., E-mail: Gulaim.Seisenbaeva@slu.se and García-Martínez, J., E-mail: j.garcia@ua.es},
abstractNote = {Two magnetically separable Fe{sub 3}O{sub 4}/SiO{sub 2} (aerogel and MSU-X) composites with very low Fe{sub 3}O{sub 4} content (<1 wt%) have been successfully prepared at room temperature by co-condensation of MPTES-functionalized Fe{sub 3}O{sub 4} nanoparticles (NPs) with a silicon alkoxide. This procedure yields a homogeneous incorporation of the Fe{sub 3}O{sub 4} NPs on silica supports, leading to magnetic composites that can be easily recovered using an external magnetic field, despite their very low Fe{sub 3}O{sub 4} NPs content (ca. 1 wt%). These novel hybrid Fe{sub 3}O{sub 4}/SiO{sub 2} materials have been tested for the oxidation reaction of 3,3′,5,5′-tetramethylbenzidine (TMB) with hydrogen peroxide showing an enhancement of the stability of the NPs in the Fe{sub 3}O{sub 4}/silica aerogel as compared to the Fe{sub 3}O{sub 4} NPs alone, even after five catalytic cycles, no leaching or agglomeration of the Fe{sub 3}O{sub 4}/SiO{sub 2} systems. - Graphical abstract: Novel magnetically separable mesoporous silica-based composites with very low magnetite content. - Highlights: • An innovative way to prepare magnetically separable composites with <1 wt% NPs. • The Fe{sub 3}O{sub 4}/silica composites are readily magnetized/demagnetized. • The Fe{sub 3}O{sub 4}/silica composites can be easily recovered using an external magnetic field. • Excellent catalytic performance and recyclability despite the low Fe{sub 3}O{sub 4} NPs content.},
doi = {10.1016/J.JSSC.2015.12.026},
url = {https://www.osti.gov/biblio/22584065}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 237,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2016},
month = {Sun May 15 00:00:00 EDT 2016}
}