期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 130, 期 2, 页码 681-688出版社
SPRINGER
DOI: 10.1007/s10973-017-6431-0
关键词
Fe3O4; gamma-Fe2O3; Water-dispersible; Hydrothermal oxidation; Thermal analysis
资金
- National Natural Science Foundation of China [21267016]
Thermal transformation of water-dispersible magnetite (Fe3O4) nanoparticles formed by the thermal decomposition of [Fe(NH2CONH2)(6)](NO3)(3) in triethylene glycol (TEG) was studied to explore the possibilities of the synthesis of water-dispersible maghemite (gamma-Fe2O3) using X-ray diffraction, differential thermal analysis, thermogravimetric analysis, and Fourier transformed infrared spectroscopy. The structural and magnetic properties of resulting gamma-Fe2O3 nanoparticles were characterized using N-2 adsorption-desorption, transmission electron microscopy, UV-Vis absorption spectroscopy, and vibrating sample magnetic measurements. The results show that the oxidation of Fe3O4 nanoparticles at 150 A degrees C for 6 h can produce superparamagnetic gamma-Fe2O3 nanoparticles less than 10 nm in size coated with a TEG layer. The obtained gamma-Fe2O3 nanoparticles are highly dispersible in water owing to the hydrophilic properties of the TEG coating.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据