Synthesis, Characterization, and Magnetic Studies of alpha-Fe2O3 Nanoparticles

被引：11

作者：

Arora, Avnish Kumar ^{[1
]}

Sharma, Mohan ^{[1
]}

Kumari, Ritu ^{[1
]}

Jaswal, Vivek Sheel ^{[1
]}

Kumar, Pankaj ^{[2
]}

机构：

[1] Maharishi Markandeshwar Univ, Dept Chem, Mullana 133207, Haryana, India

[2] Univ Petr & Energy Studies, Dept Chem, Coll Engn Studies, Bidholi 248001, Dehradun, India

来源：

JOURNAL OF NANOTECHNOLOGY | 2014年 / 2014卷

关键词：

D O I：

10.1155/2014/474909

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Very fine nanosized metal oxide, namely, iron oxide (alpha-Fe 2 O 3) has been synthesized by precipitation method using ammonia as precipitating agent and characterized by using XRD (X-ray diffraction), TGA/DTA, surface area measurement, transmission electron microscopy (TEM), and magnetic measurements techniques. XRD studies show that iron oxide was formed as alpha-Fe2O3 instead of the commonly formed magnetite nanoparticles (Fe2O3) or a mixture of magnetite (Fe2O3) and maghemite (gamma-Fe2O3, cubic), and it has rhombohedral structure. Magnetic measurements showed that iron oxide has five unpaired electrons and is ferromagnetic in nature, Ms value being 1.7 emu/g. The particle size of the synthesized iron oxide was determined by TEM. TEM images show that the size of particles of Fe2O3 varied from 15nm to 49nm with average crystallite size 35 nm.

引用

页数：7

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