CHAO Ting, ZHOU Xiaojun, YANG Hong*, LIU Chenglin, XING Da, MA Dong
(Basic Experimental Teaching Center, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The hollow Fe3O4/SiO2 magnetic microspheres were prepared using the template-based method.The large size PS microspheres firstly prepared by dispersion polymerization,and then Fe3O4/PS composite particles with interface deposition method were synthesied in presence of PS microspheres, and SiO2/Fe3O4/PS microsphere were prepared in succession with sol-gel method. Finally, the hollow Fe3O4/SiO2microspheres were prepared through calcination. The hollow Fe3O4/SiO2 magnetic microspheres were characterized by TEM、FI-IR、SEM、XRD、BET and VSM. The results showed that the hollow Fe3O4/SiO2 magnetic microspheres have an average size of 700 nm and the walls with numerous micropores in about 16 nm pore size.
KeyWords:
polymer microspheres; core-shell structure; template-based method; hollow structure; magnetic nanoparticle
