Facile Method for Synthesis of Fe3O4@Polymer Microspheres and Their Application As Magnetic Support for Loading Metal Nanoparticles

详细信息    查看全文

• 作者：Bin Liu ; Wei Zhang ; Fengkai Yang ; Hailiang Feng ; Xinlin Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：August 18, 2011
• 年：2011
• 卷：115
• 期：32
• 页码：15875-15884
• 全文大小：1119K
• 年卷期：v.115,no.32(August 18, 2011)
• ISSN：1932-7455

文摘

A general method was developed for the synthesis of Fe₃O₄@polymer microspheres with well-defined core鈥搒hell structure and various functional groups and strong magnetization through a facile in situ distillation鈥損recipitation polymerization. In this approach, the as-prepared Fe₃O₄ microspheres were directly coated by a polymer shell through the hydrogen bond interaction between the Fe₃O₄ micropsheres and oligomer without any surface modification. Moreover, hydrophilic or hydrophobic monomer or even their comonomers with different functional groups such as carboxyl, hydroxyl, amide, and ester were facilely encapsulated onto the surface of the magnetite microspheres. The thickness of the polymer shell layer was tuned by the feed of monomer amount. As for application, Fe₃O₄@P(MBAAm-co-MAA) microspheres that contained carboxyl groups were used as a magnetic catalyst support to load a series of metallic nanoparticles such as Ag, Pt, and Au. These strong magnetic microspheres were characterized by transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectra, thermogravimetric analysis, and vibrating sample magnetometry.