Preparation of super paramagnetic crystalline mesoporous γ-Fe2O3 with high surface
2007; Elsevier BV; Volume: 62; Issue: 6-7 Linguagem: Inglês
10.1016/j.matlet.2007.07.015
ISSN1873-4979
AutoresAiguo Kong, Haiwen Wang, Jiang Li, Yongkui Shan,
Tópico(s)Layered Double Hydroxides Synthesis and Applications
ResumoCrystalline mesoporous γ-Fe2O3 with high surface area has already been synthesized using mesoporous CMK-3 carbon as hard template. The TEM images of as-prepared samples show the worm-like mesostructure and the corresponding high-angle XRD patterns confirm the nanocrystalline walls of samples. Brunauer–Emmett–Teller analysis shows that it has a high surface area (187 m2 g− 1) probably because of the structure supporting of CMK-3 template in the reduction processes at high temperature, and the pore size distribution exhibits that it has a large mesopore size centered at 5.0 nm. The super paramagnetic properties of mesoporous γ-Fe2O3 synthesized can also be confirmed by the Mössbauer spectrum and the magnetization curve measurements.
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