Abstract
Magnetic Fe3O4@SiO2 composite microspheres were prepared using hydrolyzation of tetraethoxysilane and Fe3O4 nanoparticles as seeds, and then the resultant composite particles were modified with silane coupling agent 3-methacryloxypropyltrimethoxy silane. The products were characterized by scanning electron microscope, X-ray powder diffraction, fourier transform infrared spectroscopy, and vibrating-sanple magnetometry, respectively. The results clearly show that the magnetic particles have favorable superparamagnetism and remain strong magnetic response. Moreover, the duplex bonds of carbon functional groups from 3-methacryloxypropyltrimethoxy silane was introduced onto the suface of Fe3O4@SiO2 composite particles.
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