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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Biomedical and Molecular Magnets

J. Appl. Phys. 111, 07B301 (2012); http://dx.doi.org/10.1063/1.3670049 (3 pages)

Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation

Weichang Hao1,2, Yang Xi1, Jingwei Hu1, Tianmin Wang1, Y. Du2, and X. L. Wang2

1Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, People’s Republic of China
2Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, NSW 2522, Australia

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(Received 21 September 2011; accepted 3 October 2011; published online 6 February 2012)

In this report, hollow mesoporous silica (HMS) and iron oxide-hollow mesoporous silica (FexOy@HMS) core-shell composite were prepared by a one-step facile fabrication method. Transmission electron microscopy, X-ray diffraction, N2 adsorption–desorption isotherms, and vibrating sample magnetometer were used to characterize the morphology, microstructure, and magnetic properties of the HMS and core-shell composite. The magnetic separability of FexOy@HMS core-shell composite was tested in Rhodamine B (Rh.B) dye solution. The results indicate that the core-shell composite can absorb Rh.B dyes molecules effectively up to 90.1%.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

KEYWORDS, PACS, and IPC

Keywords

adsorption, desorption, iron compounds, magnetic separation, magnetisation, mesoporous materials, nanocomposites, nanofabrication, nanomagnetics, silicon compounds, transmission electron microscopy, X-ray diffraction

PACS

  • 75.75.Cd

    Fabrication of magnetic nanostructures

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 61.46.Df

    Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

  • 61.43.Gt

    Powders, porous materials

  • 68.43.Mn

    Adsorption kinetics

  • 68.43.Nr

    Desorption kinetics

International Patent Classification (IPC)

  • B03C1/00

    Magnetic separation

  • B82B1/00

    Nano-structures

  • B82B3/00

    Manufacture or treatment of nano-structures

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

  • H01F13/00

    Apparatus or processes for magnetising or demagnetising

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670049

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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