Preparation of α-Fe₂O₃ Nanodisks by Blocking the Growth of （001） Plane

Baoliang Lv1,2), Yao Xu1)?, Dong Wu1) and Yuhan Sun1) 1) State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China 2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

摘 要：Based on the difference of hydroxy group configuration on different planes of α-Fe2O3 nanoparticles, using the special adsorption and coordination of phosphate on the （001） plane of α-Fe2O3, well-crystallized and well dispersed α-Fe2O3 nanodisks with diameter of 150–200 nm and thickness of 40–80 nm were synthesized via a hydrothermal method. The magnetic properties of synthesized nanodisks were investigated. It was found that the nanodisks possessed a saturation magnetization （Ms） of 0.38 emu/g, a remanent magnetization （Mr） of 0.031 emu/g and a coercivity of 452.91 Oe at room temperature. The Mr and coercivity of synthesized α-Fe2O3 nanodisks are higher and the Ms is lower than those of other previously reported α- Fe2O3 nanostructures.

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