Uniform Fe 3 O 4  Octahedra with Tunable Edge Length – Synthesis by a Facile Polyol Route and Magnetic Properties | Zendy

Zhao Lijun | Zendy; Duan LianFeng | Zendy

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Uniform Fe 3 O 4 Octahedra with Tunable Edge Length – Synthesis by a Facile Polyol Route and Magnetic Properties

Author(s) -

Zhao Lijun,

Duan LianFeng

Publication year - 2010

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.201000580

Subject(s) - octahedron , ethylene glycol , nucleation , chemistry , crystallography , magnetite , ion , yield (engineering) , adsorption , enhanced data rates for gsm evolution , nanotechnology , materials science , crystal structure , metallurgy , organic chemistry , telecommunications , computer science

A straightforward and effective polyol route for the controllable synthesis of high‐quality magnetite (Fe 3 O 4 ) octahedra with uniform edge length in ethylene glycol (EG) solution is presented. Fe 3 O 4 octahedra with edge length in the range 70–1000 nm were selectively synthesized in high yield. The surfaces of octahedral Fe 3 O 4 crystals correspond to (111) planes. Formation of Fe 3 O 4 octahedra was attributed to the preferential adsorption of OH – ions onto the (111) planes of Fe 3 O 4 nuclei, which inhibits the growth rate along the <111> direction. The release rate of Fe 2+ ions in the synthesis can be rationally manipulated by varying the dose of N 2 H 4 · H 2 O. Control of the nucleation and growth rate by N 2 H 4 · H 2 O provides a facile and effective route to harvest Fe 3 O 4 octahedra with different dimensions. The magnetic analysis shows that Fe 3 O 4 octahedra with sharp tips possess attractive magnetic properties.

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