Department of Physics, Center of Functional Nanomaterials and Devices, East China Normal University, North Zhongshan Rd, 3663, 200062, Shanghai, People's Republic of China.
Nanoscale Res Lett. 2009 Sep 2;4(12):1439-46. doi: 10.1007/s11671-009-9417-4.
Much interest has been attracted to the magnetic materials with porous structure because of their unique properties and potential applications. In this report, Fe3O4nanoporous particles assembled from small Fe3O4nanoparticles have been prepared by thermal decomposition of iron acetylacetonate in the presence of polyethylene glycol 4000. The size of the spherical nanoporous particles is 100-200 nm. Surface area measurement shows that these Fe3O4nanoporous particles have a high surface area of 87.5 m2/g. Magnetization measurement and Mössbauer spectrum indicate that these particles are nearly superparamagnetic at room temperature. It is found that the morphology of the products is greatly influenced by polyethylene glycol concentration and the polymerization degree of polyethylene glycol. Polyethylene glycol molecules are believed to facilitate the formation of the spherical assembly.
由于具有独特的性质和潜在的应用，多孔结构的磁性材料引起了广泛的关注。在本报告中，通过在聚乙二醇 4000 的存在下热分解乙酰丙酮铁，制备了由小的 Fe3O4 纳米颗粒组装而成的 Fe3O4 纳米多孔颗粒。球形纳米多孔颗粒的尺寸为 100-200nm。表面积测量表明，这些 Fe3O4 纳米多孔颗粒具有 87.5m2/g 的高表面积。磁化测量和穆斯堡尔谱表明，这些颗粒在室温下几乎是超顺磁性的。研究发现，产品的形态受聚乙二醇浓度和聚乙二醇聚合度的影响很大。聚乙二醇分子被认为有利于球形组装的形成。
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