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学科主题物理化学
A facile and novel approach to magnetic Fe@SiO2 and FeSi2@SiO2 nanoparticles
Li, Miao1; Chen, Xiao1; Guan, Jingchao1; Wang, Xinkui1; Wang, Junhu2; Williams, Christopher T.3; Liang, Changhai1; CLiang
刊名JOURNAL OF MATERIALS CHEMISTRY
2012-01-14
ISSN待补充
DOI10.1039/c1jm13720d
22期:2页:609-616
收录类别SCI
文章类型Article
部门归属15
项目归属1501
产权排名2,5
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Materials Science
关键词[WOS]BETA-FESI2 SINGLE-CRYSTALS ; SEMICONDUCTING SILICIDES ; NICKEL-CATALYSTS ; SURFACE-AREA ; THIN-FILMS ; FESI2 ; IRON ; XPS ; NANOCAPSULES ; NANOWIRES
英文摘要A Facile and Novel Approach to Magnetic Fe@SiO2 and FeSi2@SiO2 Nanoparticles; Fe@SiO2 and FeSi2@SiO2 nanoparticles with core@shell structure have successfully been synthesized by direct silane silicification of Fe2O3 nanoparticles. The as-prepared samples were characterized by N-2 physisorption, X-ray diffraction, transmission electron microscopy, temperature programmed reduction of H-2 X-ray photoelectron spectroscopy, Mossbauer spectroscopy, and superconducting quantum interference magnetometry. It was found that the amorphous SiO2 shell was formed to protect the core against oxidation when the reduced Fe2O3 nanoparticles were silicified by silane. When the reduced Fe2O3 nanoparticles were exposed to air, a Fe2O3 layer was formed. The structure of the core changed from cubic Fe to orthorhombic FeSi2 with increasing silicification temperatures from 350 to 550 degrees C, due to the dissolution of Si atoms into the iron lattice. The magnetic characterization showed that all samples have ferromagnetic nature and the saturation magnetization values drastically decreased with increasing silicification temperature. This novel methodology can be applied to synthesis of Co@SiO2 and Ni@SiO2 with core@shell structure. The as-prepared Fe@SiO2 and FeSi2@SiO2 nanoparticles with core@shell structure can find applications in magnetically separable catalysts, biomedicines, and magnetically recording materials.
语种英语
WOS记录号WOS:000299020000046
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115828
专题中国科学院大连化学物理研究所
通讯作者CLiang
作者单位1.Dalian Univ Technol, Sch Chem Engn, Lab Adv Mat & Catalyt Engn, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China
3.Univ S Carolina, Swearingen Engn Ctr, Dept Chem Engn, Columbia, SC 29208 USA
推荐引用方式
GB/T 7714
Li, Miao,Chen, Xiao,Guan, Jingchao,et al. A facile and novel approach to magnetic Fe@SiO2 and FeSi2@SiO2 nanoparticles[J]. JOURNAL OF MATERIALS CHEMISTRY,2012,22(2):609-616.
APA Li, Miao.,Chen, Xiao.,Guan, Jingchao.,Wang, Xinkui.,Wang, Junhu.,...&CLiang.(2012).A facile and novel approach to magnetic Fe@SiO2 and FeSi2@SiO2 nanoparticles.JOURNAL OF MATERIALS CHEMISTRY,22(2),609-616.
MLA Li, Miao,et al."A facile and novel approach to magnetic Fe@SiO2 and FeSi2@SiO2 nanoparticles".JOURNAL OF MATERIALS CHEMISTRY 22.2(2012):609-616.
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