Synthesis, structure and magnetic properties of porous magnetic composite, based on MCM-41 molecular sieve with Fe{sub 3}O{sub 4} nanoparticles

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.04.039· OSTI ID:20905391

Kolotilov, Sergey V ^[1]; Shvets, Oleksiy ^[1]; Cador, Olivier ^[2]; Kasian, Natalia ^[1]; Pavlov, Vyacheslav G ^[3]; Ouahab, Lahcene ^[2]; Ilyin, Vladimir G ^[1]; Pavlishchuk, Vitaly V ^[1]

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1. L.V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of the Ukraine, Prospekt Nauki 31, Kiev 03028 (Ukraine)
2. Equipe Organometallique et Materiaux Moleculaires, UMR 6226 CNRS-Universite de Rennes 1, Campus de Beaulieu, 35042 Rennes cedex (France)
3. A.A. Blagonravov Institute of Mechanical Engineering, Malyy Kharitonovskiy lane 4, Moscow, 101830 (Russian Federation)

Porous magnetic composites were prepared by the synthesis of molecular sieve MCM-41 in the presence of Fe{sub 3}O{sub 4} nanoparticles with average diameter of 15 nm. Nanoparticles were captured by porous silica matrix MCM-41, which resulted in their incorporation, as it was confirmed by TEM, SEM and X-ray diffraction. The materials possessed high surface area (392-666 m{sup 2} g{sup -1}), high pore volume (0.39-0.73 cm{sup 3} g{sup -1}) along with high magnetic response (M {sub S} up to 28.4 emu g{sup -1} at 300 K). Calcination of samples resulted in partial oxidation of Fe{sub 3}O{sub 4} to {alpha}-Fe{sub 2}O{sub 3}. The influence of nanoparticles content on sorption and magnetic properties of the composites was shown. No hysteresis was found for the samples at 300 K; at 5 K, H {sub C} was in the range 370-385 G for non-calcinated samples and 350-356 G for calcinated ones. - Graphical abstract: Schematic presentation of MCM-41/Fe{sub 3}O{sub 4} composite.

• OSTI ID: 20905391
• Journal Information: Journal of Solid State Chemistry, Vol. 179, Issue 8; Other Information: DOI: 10.1016/j.jssc.2006.04.039; PII: S0022-4596(06)00255-6; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCINATION
HYSTERESIS
IRON OXIDES
MAGNETIC PROPERTIES
MOLECULAR SIEVES
NANOSTRUCTURES
OXIDATION
PARTICLES
POROUS MATERIALS
SCANNING ELECTRON MICROSCOPY
SILICA
SORPTION
SURFACE AREA
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION