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
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。