链式钴微米六方片的溶剂热合成及磁性  

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

作　　者：刘美英[1] 林春明[1] 许志玲[1] 白丹[1] 单楠楠[1] 李柏娜[1] 

机构地区：[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

出　　处：《高等学校化学学报》2011年第2期201-203,共3页Chemical Journal of Chinese Universities

基　　金：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);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：钴纳米及微米材料具有优良的光、电、磁、催化性能以及多晶结构,在高密度信息储存、生物抗癌药物和单电子器件等方面有着广阔的应用前景.目前制备该材料的方法有羰基钴热解法[1]、气相沉积法[2]、液相还原法[3]、水热法[4]、模板法[5]和溶剂热法[6]等.羰基钴热解法价格昂贵,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 A5m2/kg,a remnant magnetization of 13.7 A5m2/kg,and a coercivity of 1.301×104 A/m.

关 键 词：溶剂热 六方片 聚乙烯吡咯烷酮 十二硫醇 铁磁性 

分 类 号：O614[理学—无机化学]