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  Synthesis and Magnetic Investigation of Ordered Mesoporous Two-Line Ferrihydrite

Tüysüz, H., Salabaş, E. L., Weidenthaler, C., & Schüth, F. (2008). Synthesis and Magnetic Investigation of Ordered Mesoporous Two-Line Ferrihydrite. Journal of the American Chemical Society, 130(1), 280-287. doi:10.1021/ja075528j.

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 Creators:
Tüysüz, Harun1, Author              
Salabaş, Elena Lorena1, Author              
Weidenthaler, Claudia1, Author              
Schüth, Ferdi1, Author              
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1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              

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 Abstract: We report here for the first time on the synthesis and characterization of ordered mesoporous two-line ferrihydrite. Ordered mesoporous ferrihydrite has been prepared via the nanocasting route. Two types of ordered mesoporous silica, two-dimensional hexagonal SBA-15 and three-dimensional cubic KIT-6, were employed as hard templates. The magnetic behavior of ferrihydrite replicas with an average diameter of about 7 nm was investigated by direct current magnetometry. The temperature dependence of magnetization shows a superparamagnetic transition around 70 K. Field-induced changes in the low-field behavior of the magnetization were observed below 30 K. The results are explained assuming a spin-glass-like state of the surface spins. The 2D hexagonal two-line ferrihydrite showed very large coercivity up to 1.6 kOe at 5 K.

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Language(s): eng - English
 Dates: 2007-08-092007-12-122008-01-01
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/ja075528j
 Degree: -

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Title: Journal of the American Chemical Society
  Other : JACS
  Abbreviation : J. Am. Chem. Soc.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 130 (1) Sequence Number: - Start / End Page: 280 - 287 Identifier: ISSN: 0002-7863
CoNE: https://pure.mpg.de/cone/journals/resource/954925376870