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

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (2): 201.

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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

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.

Abstract

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

CLC Number:

0614

TrendMD:

LIU Mei-Ying*, LIN Chun-Ming, XU Zhi-Ling, BAI Dan, SHAN Nan-Nan, LI Bo-Na. Solvothermal Synthesis and Magnetic Properties of Hexagonal-like Cobalt Microflakes with Chain-structure[J]. Chem. J. Chinese Universities, 2011, 32(2): 201.

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

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