DICP OpenIR
Subject Area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
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
2012-01-14
ISSN待补充
DOI10.1039/c1jm13720d
Volume22Issue:2Pages:609-616
Indexed BySCI
SubtypeArticle
Department15
Funding Project1501
Contribution Rank2,5
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Materials Science
WOS KeywordBETA-FESI2 SINGLE-CRYSTALS ; SEMICONDUCTING SILICIDES ; NICKEL-CATALYSTS ; SURFACE-AREA ; THIN-FILMS ; FESI2 ; IRON ; XPS ; NANOCAPSULES ; NANOWIRES
AbstractA 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.
Language英语
WOS IDWOS:000299020000046
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115828
Collection中国科学院大连化学物理研究所
Corresponding AuthorCLiang
Affiliation1.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
Recommended Citation
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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