材料科学
介孔材料
纳米颗粒
介孔二氧化硅
化学工程
电化学
高分辨率透射电子显微镜
涂层
水溶液
多孔性
阳极
纳米技术
复合材料
电极
透射电子显微镜
化学
催化作用
有机化学
物理化学
工程类
作者
Ping Wang,Yihua Zhu,Xin Yang,Chunzhong Li
标识
DOI:10.1016/j.colsurfa.2006.08.015
摘要
Magnetic nanoparticles within the pores of mesoporous silica (MS) microspheres have been synthesized by electrochemical method using a metal iron plate as sacrificing anode and a sheet of stainless steel as cathode in an alkaline aqueous medium containing complexing compounds. Finally, the so obtained iron-functionalized silica microspheres were thermally reduced under the hydrogen atmosphere to produce iron/silica magnetic composites. The TEM, SEM, XRD, HRTEM and EDS were used to determine the effect of insertion on the structure and porosity of the host matrices. The mechanism of iron nanoparticles formation within the mesopores appears to occur through the initial binding and coating of the pore walls to form wormlike structures within the mesoporous template. The iron/silica nanoparticles exhibit essential characteristics of ferromagnetic behavior, as investigated by magnetometry.
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