Solvothermal synthesis of magnetic Fe_3O_4 microparticles via self-assembly of Fe_3O_4 nanoparticles

查看全文 作　　者：Wei Zhang Fenglei Shen Ruoyu [1]Hong

机构地区：[1]College of Chemistry, Chemical Engineering &Materials Science, and Key Laboratory of Organic Synthesis of Jiangsu Province, Soochow University, SIP, Suzhou 215123, China

出　　处：《Particuology》索引2011年第9卷第2期,共8页

基　　金：supported by the National Natural Science Foundation of China (NSFC,nos.20876100 and 20736004);the National Basic Research Program of China (973 Program,no.2009CB219904);the State Key Lab of Multiphase Complex Systems of the Chinese Academy of Sciences (no.2006-5);the Key Lab of Organic Synthesis of Jiangsu Prov.;R&D Foundation of Nanjing Medical Univ.(NY0586);Post-doctoral Science Foundation of Jiangsu Prov.;National Post-doctoral Science Foundation (20090451176);the Commission of Science and Technology of Suzhou Municipality (YJS0917,SG0978);Technology Innovation Foundation of Suzhou New District and MOST;Minjiang Scholarship of Fujian Prov. 摘　　要：Ferromagnetic Fe 3 O 4 nanoparticles were synthesized and then self-assembled into microparticles via a solvothermal method,using FeCl 3 ·6H 2 O as the iron source,sodium oleate as the surfactant,and ethylene glycol as the reducing agent and solvent.The obtained Fe 3 O 4 microparticles were characterized by X-ray powder diffraction (XRD),X-ray photoelectron spectroscopy (XPS),Raman spectroscopy and vibrating sample magnetometer (VSM).The size and morphology of the particles were examined using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).The Fe 3 O 4 microparticles of nearly monodisperse diameters,controllable in the range of 120-400 nm,consist of assemblies of Fe 3 O 4 nanoparticles with a diameter of 22 nm.The effects of reaction time,amount of surfactant and NaAc on the products were discussed.Interestingly,by using the pre-synthesized Fe 3 O 4 microparticles as the growth substrates,spherical and smooth-looking Fe 3 O 4 microparticles with average diameter of 1 m were obtained.A plausible formation process was discussed. 关键词：FE3O4纳米粒子溶剂热合成纳米颗粒自组装铁磁性微粒 X射线光电子能谱扫描电子显微镜

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Solvothermal synthesis of magnetic Fe_3O_4 microparticles via self-assembly of Fe_3O_4 nanoparticles

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