期刊
APPLIED SURFACE SCIENCE
卷 280, 期 -, 页码 679-685出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.05.041
关键词
Fe3O4 nanoparticles; Orthogonal experiment; Process parameters; In situ dispersion
类别
资金
- National Natural Science Foundation of China [10872087]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Graduate Science and Technology Innovation Foundation of Jiangsu [CXLX12_0429]
- Project of Guangxi on Promoting and Transforming of Scientific and Technological Achievements [1298009-15]
Fe3O4 nanoparticles ranging from 8.9 to 12.2 nm were prepared by chemical coprecipitation based on L-16(4(5)) orthogonal experiments. The effects of five process parameters (pH, Fe2+/Fe3+ ratio, reaction temperature, ferric salt concentration, and crystallization temperature) on particle size and specific saturation magnetization of Fe3O4 nanoparticles were investigated. The micro-morphology, crystal structure, specific saturation magnetization, and surface properties were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), vibration magnetometer (VSM), and Fourier infrared (FT-IR). The results indicate that Fe2+/Fe3+ ratio and pH are the main factors affecting particle size and specific saturation magnetization, respectively. The Fe3O4 nanoparticles are mostly spherical powders with a narrow size distribution and a high purity. The Fe3O4 nanoparticles can achieve high dispersion performance and suspension stability by in situ dispersion with double adsorption layers. (C) 2013 Elsevier B.V. All rights reserved.
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