Magnetite / Polyvinylpyrrolidone Nanocomposite: Green Simple Fabrication and characterization
作者单位：Department of Material Science and Engineering Najafabad Branch Islamic Azad University Najafabad 85141-43131 Iran
会议名称：《International Conference on Chemistry and Chemical Engineering （ICCCE 2011）》
会议日期：2011年
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
关 键 词：Magnetic nanoparticles Fe3O4 / PVP nanocomposite Particle size Particle density.
摘 要：The paper presents results of research on green simple preparing the magnetic nanocomposite based on Fe3O4 nanoparticles. The synthesis and assembly of magnetite nanoparticles was performed by a one-step procedure. Fe3O4 nanoparticles can be synthesized by Y. Zheng method. Polyvinylpyrrolidone （PVP） homopolymer with molecular weight about 10,000;synthesized by hydrogen peroxide/ascorbic acid as a redox couple initiator in aqueous medium. A kind of nanocomposite with nano Fe3O4 as the core and an absorption layer of PVP molecules surrounding it have been prepared. The PVP modification did not change the crystalline structure of Fe3O4, and the PVP-coated Fe3O4 nanoparticles. The average size of the individual magnetite particles is about 8 nm, calculated by the Scherrer equation The ability to synthesize and assemble monodispersed core-shell nanoparticles is important for exploring the unique properties of nanoscales core- shell, or their combinations in magnetic, catalytic, and biological applications.