A facile synthesis of monodisperse CoFe2O4/SiO2 nanoparticles

作者：Wang, Hai^*; Huang, Jun; Ding, Liyun; Li, DaPeng; Han, Yun

来源：Applied Surface Science, 2011, 257(16): 7107-7112.

DOI：10.1016/j.apsusc.2011.03.063

• CoFe2O4/SiO2 nanoparticles
• Monodispersity
• Carrier

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.

• 出版日期2011-6-1
• 单位武汉理工大学