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Preparation and characterization of silica-coated Fe3O4 nanoparticles used as precursor of ferrofluids
Alternative TitleAppl. Surf. Sci.
Hong, R. Y.; Li, J. H.; Zhang, S. Z.; Li, H. Z.; Zheng, Y.; Ding, J. M.; Wei, D. G.
2009
Source PublicationApplied Surface Science
Issue6Pages:3485-3492
AbstractFe3O4 magnetic nanoparticles (MNPs) were synthesized by the co-precipitation of Fe3+ and Fe2+ with ammonium hydroxide. The sodium citrate-modified Fe3O4 MNPs were prepared under Ar protection and were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and vibrating sample magnetometer (VSM). To improve the oxidation resistance of Fe3O4 MNPs, a silica layer was coated onto the modified and unmodified MNPs by the hydrolysis of tetraethoxysilane (TEOS) at 50 degrees C and pH 9. Afterwards, the silica-coated Fe3O4 core/shell MNPs were modified by oleic acid (OA) and were tested by IR and VSM. IR results revealed that the OA was successfully grafted onto the silica shell. The Fe3O4/SiO2 core/shell MNPs modified by OA were used to prepare water-based ferrofluids (FFs) using PEG as the second layer of surfactants. The properties of FFs were characterized using a UV-vis spectrophotometer, a Gouy magnetic balance, a laser particle size analyzer and a Brookfield LVDV-III+ rheometer. (C) 2008 Elsevier B. V. All rights reserved.
KeywordMagnetic Nanoparticles Fe3o4/sio2 Surface Modification Ferrofluids Rheology Chemical-vapor-deposition Magnetite Nanoparticles Rheological Properties Surface-modification Sol-gel Fluids Reactor Nanocomposites Hyperthermia Nanocrystal
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Indexed BySCI
Language英语
WOS IDWOS:000261972100003
Citation statistics
Cited Times:91[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11404
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Hong, R. Y.,Li, J. H.,Zhang, S. Z.,et al. Preparation and characterization of silica-coated Fe3O4 nanoparticles used as precursor of ferrofluids[J]. Applied Surface Science,2009(6):3485-3492.
APA Hong, R. Y..,Li, J. H..,Zhang, S. Z..,Li, H. Z..,Zheng, Y..,...&Wei, D. G..(2009).Preparation and characterization of silica-coated Fe3O4 nanoparticles used as precursor of ferrofluids.Applied Surface Science(6),3485-3492.
MLA Hong, R. Y.,et al."Preparation and characterization of silica-coated Fe3O4 nanoparticles used as precursor of ferrofluids".Applied Surface Science .6(2009):3485-3492.
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