Controlled template-free hydrothermal synthesis of hematite nanoplatelets

被引：20
|
作者：
Sun, Qian-jin [1 ]
Lu, Xue-gang [1 ]
Liang, Gong-ying [1 ]
机构：
[1] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Sch Sci, Xian 710049, Peoples R China
来源：
MATERIALS LETTERS | 2010年 / 64卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Hematite; Nanoplatelets; Synthesis; Magnetic properties; LARGE-SCALE SYNTHESIS; NANORINGS;
D O I：
10.1016/j.matlet.2010.06.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ferromagnetic alpha-Fe2O3 nanoplatelets with diameters of 100-140 nm and heights of 40-70 nm have been successfully prepared on a large-scale through double anion mediation hydrothermal method. The formation of the nanoplatelets depends on the molar ratio of hydrosulfite ions to sulfate ions. Nanoplatelets, short nanocolumns, polyhedra and a mixture of nanospheres and nanoellipsoids of alpha-Fe2O3 can be obtained by adjusting the molar ratio of HSO3- to SO42-. Compared to short nanocolumns, nanoplatelets display a smaller saturation magnetization of 7.36 emu/g and a smaller coercivity value of 485 Oe. (C) 2010 Elsevier B.V. All rights reserved,
引用
收藏
页码：2006 / 2008
页数：3
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