Journal
MATERIALS LETTERS
Volume 69, Issue -, Pages 48-51Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2011.11.052
Keywords
Magnetic material; Layered double hydroxide (LDH); Perpendicularly oriented growth; Core-shell; Composite material; Honeycomb-like morphology
Funding
- 973 Program [2011CBA00508]
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Novel magnetic core-shell hierarchical composite submicrospheres Fe3O4@CuNiAl-LDH were facilely synthesized by coprecipitation of CuNiAl-layered double hydroxide (LDH) over the surface of pre-prepared magnetite submicrospheres in both methanol-water and water media under ambient conditions and systematically characterized by SEM/TEM, XRD, ICP. TGA, BET and VSM techniques. The as-fabricated composites possess center-hollowed core-shell hierarchical structure and strong magnetic susceptivity. Particularly, the composite submicrospheres obtained in water present honeycomb-like morphology with thin CuNiAl-LDH nanoplatelets (ca. 100 nm x 21 nm) staggered perpendicularly oriented grown on the surface of Fe3O4 core, affording to a cellular structure resulting in high specific surface area of the Fe3O4@CuNiAl-LDH composite. The formation mechanism of the Fe3O4@CuNiAl-LDH submicrospheres is tentatively proposed. (C) 2011 Elsevier B.V. All rights reserved.
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