Facile route to gamma-Fe2O3/SiO2 nanocomposite used as a precursor of magnetic fluid
文献类型：期刊论文
| 作者 | Hong, R. Y. ; Fu, H. P. ; Di, G. Q. ; Zheng, Y. ; Wei, D. G. |
| 刊名 | Materials Chemistry and Physics
 |
| 出版日期 | 2008 |
| 期号 | 1页码:132-141 |
| 关键词 | composite materials iron oxide magnetic properties nanocrystallites iron-oxide nanocrystalline gamma-fe2o3 nanometer-size gel matrix silica nanoparticles particles pyrolysis ferrofluids moments |
| 其他题名 | Mater. Chem. Phys. |
| 中文摘要 | Maghemite (gamma-Fe2O3) nanoparticles (NPs) homogeneously dispersed in silica matrix were obtained via a three-step chemical procedure at mild conditions. The acid-treated solids were obtained using silica NPs, Fe(NO3)(3)center dot 9H(2)O and acetic acid. The nanocomposites with various contents of maghemite were prepared by heating the acid-treated solids at 80 degrees C for 2 h and then at 400 degrees C for 1 h. The acid-treated solids were studied by means of Fourier Transform infrared spectroscopy (FTIR) and thermogravimetry (TG). The morphology and particle size of the magnetic nanocrystallites were evaluated by the transmission electron microscopy (TEM) technique, while the nature of the obtained nanocomposites was studied using X-ray powder diffraction (XRD) and vibrating sample magnetometer (VSM), showing that the acid treatment played a critical role for the magnetic-phase formation and the maximum saturation magnetization (Ms) of the obtained nanocomposite was 37.78 emu g(-1). However, when FeCl3 center dot 6H(2)O was used as precursor instead of Fe(NO3)(3)center dot 9H(2)O, pure hematite (alpha-Fe2O3) particles dispersed in silica matrix were obtained. Magnetic fluid (MF) was prepared using the maghemite/silica nanocomposites by high-energy ball milling and was characterized by UV-vis, Gouy magnetic balance and rotating rheometer. (C) 2007 Published by Elsevier B.V. |
| 原文出处 | |
| 语种 | 英语 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2765]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | Hong, R. Y.,Fu, H. P.,Di, G. Q.,et al. Facile route to gamma-Fe2O3/SiO2 nanocomposite used as a precursor of magnetic fluid[J]. Materials Chemistry and Physics,2008(1):132-141. |
| APA | Hong, R. Y.,Fu, H. P.,Di, G. Q.,Zheng, Y.,&Wei, D. G..(2008).Facile route to gamma-Fe2O3/SiO2 nanocomposite used as a precursor of magnetic fluid.Materials Chemistry and Physics(1),132-141. |
| MLA | Hong, R. Y.,et al."Facile route to gamma-Fe2O3/SiO2 nanocomposite used as a precursor of magnetic fluid".Materials Chemistry and Physics .1(2008):132-141. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。