Synthesis of Fe_3O_4-coated silica aerogel nanocomposites
Synthesis of Fe_3O_4-coated silica aerogel nanocomposites作者机构:Devision of Materials Science and EngineeringInha University
出 版 物:《中国有色金属学会会刊:英文版》 (Transactions of Nonferrous Metals Society of China)
年 卷 期:2012年第22卷第S3期
页 面:702-706页
核心收录:
学科分类:07[理学] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0702[理学-物理学]
主 题:nanocomposite Fe3O4 SiO2 sol gel synthesis
摘 要:Fe3O4:SiO2 nanocomposite powders were synthesized by a two-step process,which included the precipitation of FeCl2 and FeCl3 and the gelation of silicic acid solution derived from water *** first,Fe3O4 nanoparticles having a crystallite size of 20 nm were obtained by controlling the ratio of Fe(II) and Fe(III) *** the second step,Fe3O4 particles were embedded in SiO2 matrix by the hydrolysis and subsequent condensation of the silicic acid solution containing Fe3O4 *** was found that the Fe3O4 nanoparticles homogenously disperse in the SiO2 *** Fe3O4:SiO2 nanocomposite exhibited an enhanced thermal stability against oxidation compared with pure ***-IR analysis indicates the presence of the Si-O-Fe bond in the Fe3O4:SiO2 (1:10,mole fraction) nanocomposite.