期刊
APPLIED SURFACE SCIENCE
卷 257, 期 16, 页码 7107-7112出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2011.03.063
关键词
CoFe2O4/SiO2 nanoparticles; Monodispersity; Carrier
类别
资金
- National Natural Science Foundation of China [60877048]
Aminated-CoFe2O4/SiO2 magnetic nanoparticles (NPs) were prepared from primary silica particles using modified StOber method. By optimizing the preparation conditions, monodisperse CoFe2O4/SiO2 NPs with high amino groups' density were obtained, which is necessary for enzyme immobilization. TEM confirm that the sample is a core/shell structure. These aminated-CoFe2O4/SiO2 NPs have narrow size distributions with a mean size of about 60 nm. Moreover, the aminated-CoFe2O4/SiO2 NPs can be easily dispersed in aqueous medium. The experimental results also show that the NPs have superparamagnetism, indicating that the aminated-CoFe2O4/SiO2 NPs can be used as an effective carrier for the enzyme immobilization. (C) 2011 Elsevier B.V. All rights reserved.
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