中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A facile and novel approach to magnetic Fe@SiO2 and FeSi2@SiO2 nanoparticles

文献类型:期刊论文

作者Li, Miao1; Chen, Xiao1; Guan, Jingchao1; Wang, Xinkui1; Wang, Junhu2; Williams, Christopher T.3; Liang, Changhai1
刊名journal of materials chemistry
出版日期2012-01-14
卷号22期号:2页码:609-616
ISSN号待补充
产权排序2,5
通讯作者cliang
中文摘要a facile and novel approach to magnetic fe@sio2 and fesi2@sio2 nanoparticles
英文摘要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.
WOS标题词science & technology ; physical sciences ; technology
学科主题物理化学
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
收录类别SCI
语种英语
WOS记录号WOS:000299020000046
公开日期2012-07-09
源URL[http://159.226.238.44/handle/321008/115828]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
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.,...&Liang, Changhai.(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.

入库方式: OAI收割

来源:大连化学物理研究所

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