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Magnetically separable mesoporous Fe3O4/silica catalysts with very low Fe3O4 content
Univ Alicante, Dept Inorgan Chem, Mol Nanotechnol Lab, Carretera San Vicente S-N, E-03690 Alicante, Spain..
Univ Alicante, Dept Inorgan Chem, Mol Nanotechnol Lab, Carretera San Vicente S-N, E-03690 Alicante, Spain..
Univ Alicante, Dept Inorgan Chem, Mol Nanotechnol Lab, Carretera San Vicente S-N, E-03690 Alicante, Spain..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2016 (English)In: Journal of Solid State Chemistry, ISSN 0022-4596, E-ISSN 1095-726X, Vol. 237, 138-143 p.Article in journal (Refereed) Published
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Abstract [en]

Two magnetically separable Fe3O4/SiO2 (aerogel and MSU-X) composites with very low Fe3O4 content (< 1 wt%) have been successfully prepared at room temperature by co-condensation of MPTES-functionalized Fe3O4 nanoparticles (NPs) with a silicon alkoxide. This procedure yields a homogeneous incorporation of the Fe3O4 NPs on silica supports, leading to magnetic composites that can be easily recovered using an external magnetic field, despite their very low Fe3O4 NPs content (ca. 1 wt%). These novel hybrid Fe3O4/SiO2 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 Fe3O4/silica aerogel as compared to the Fe3O4 NPs alone, even after five catalytic cycles, no leaching or agglomeration of the Fe3O4/SiO2 systems. 

Place, publisher, year, edition, pages
2016. Vol. 237, 138-143 p.
Keyword [en]
Magnetic materials, Porous materials, Silica, Magnetite nanoparticles, Peroxidase-like activity
National Category
Chemical Sciences Physical Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-294650DOI: 10.1016/j.jssc.2015.12.026ISI: 000373661100020OAI: oai:DiVA.org:uu-294650DiVA: diva2:932658
Funder
Swedish Research Council
Available from: 2016-06-02 Created: 2016-05-26 Last updated: 2016-06-14Bibliographically approved

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