高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (2): 201.

• 研究快报 • 上一篇    下一篇

链式钴微米六方片的溶剂热合成及磁性

刘美英, 林春明, 许志玲, 白丹, 单楠楠, 李柏娜   

  1. 辽宁师范大学化学化工学院, 功能材料化学研究所,  大连 116029
  • 收稿日期:2010-10-14 修回日期:2010-12-15 出版日期:2010-02-10 发布日期:2011-02-23
  • 通讯作者: 刘美英 E-mail:myliu312@yahoo.com
  • 基金资助:

    国家自然科学基金(批准号:  20803033)、   国家“九七三”计划项目(批准号:  2009CB220010)、 教育部留学回国人员科研启动基金、   辽宁省教育厅科学技术项目(批准号: L2010225)和大连化学物理研究所催化基础国家重点实验室开放基金(批准号: N\|06\|09)资助.

Solvothermal Synthesis and Magnetic Properties of Hexagonal-like Cobalt Microflakes with Chain-structure

LIU Mei-Ying*, LIN Chun-Ming, XU Zhi-Ling, BAI Dan, SHAN Nan-Nan, LI Bo-Na   

  1. Institute of Chemistry for Functionalized Materials, School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian  116029, China
  • Received:2010-10-14 Revised:2010-12-15 Online:2010-02-10 Published:2011-02-23
  • Contact: LIU Mei-Ying E-mail:myliu312@yahoo.com
  • Supported by:

    国家自然科学基金(批准号:  20803033)、   国家“九七三”计划项目(批准号:  2009CB220010)、 教育部留学回国人员科研启动基金、   辽宁省教育厅科学技术项目(批准号: L2010225)和大连化学物理研究所催化基础国家重点实验室开放基金(批准号: N\|06\|09)资助.

摘要: 以十二硫醇和聚乙烯吡咯烷酮(PVP)为结构导向剂、乙二醇和乙二胺为混合溶剂,利用溶剂热技术成功地制备了Co粒子,并用XRD、SEM、TEM、HRTEM及SQUID对材料的晶体结构、形貌及磁性进行研究. 结果表明:Co粒子属hcp相,呈六方片状,直径约为2 μm,厚度约为80 nm,大量的六方片相互交叉连接成链式结构,并且六方薄片由更为细小的丝带状的纳米片(厚度约为10 nm)构成;室温下样品表现出良好的铁磁性特征,其饱和磁化强度Ms、剩余磁化强度Mr及矫顽力分别为126.6 emu/g、13.7 emu/g和163.4 Oe.  

关键词: 溶剂热, 六方片, 链式, 铁磁性

Abstract: Hexagonal-like Co microflakes with an average diameter of 2  μm and a thickness of 80 nm were successfully synthesized by reduction of cobalt nitrate in a polyol/ethylenediamine mixed medium via a solvothermal process in the presence of PVP and dodecanethiol as the structure-directing agents. The products were characterized by XRD, EDX, SEM, TEM, HRTEM and SQUID. The results show that Co microflake exhibits well-crystalline hexagonal close-packed(hcp) phase and is self-assembled to chain-like structure and is composed of ultrathin ribbon-like nanostructure with a thickness of 10 nm. This material exhibits a ferromagnetic behavior with a saturation magnetization of 126.6 emu/g, a remnant magnetization of 13.7  emu/g, and a coercivity of 1.301×10.4 A/m.

Key words: Solvothermal, Hexagonal microflake, chain-like structure, ferromagnetic

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