Magnetic iron oxide nanoparticles coated by hierarchically structured silica: a highly stable nanocomposite system and ideal catalyst support
文献类型：期刊论文
| 作者 | Jin, Changzi1,2; Wang, Yanjie1; Wei, Haisheng1; Tang, Hailian1; Liu, Xin1,2; Lua, Ting1; Wang, Junhu1,2 |
| 刊名 | journal of materials chemistry a
 |
| 出版日期 | 2014 |
| 卷号 | 2期号:29页码:11202-11208 |
| 通讯作者 | 王军虎 |
| 英文摘要 | a well-defined core-shell nanocomposite with magnetic iron oxide nanoparticles coated by a hierarchically structured silica shell has been synthesized through a sol-gel process and pseudomorphic transformation. the prepared materials were characterized by means of transmission electron microscopy, small and wide angle x-ray diffraction, mossbauer spectroscopy and n-2 physical adsorption-desorption. it has been shown that the core-shell nanocomposite possesses a magnetic core in the form of fe3o4 or gamma-fe2o3 and a unique hierarchically structured silica shell consisting of an inner nonporous shell and outer shell with hierarchical pores. as a result, this nanocomposite exhibits high stability (acid resistance) and a large surface area (447 m(2) g(-1)), which will be especially suitable for use as catalyst supports. to demonstrate this point, a functional catalyst consisting of small pt nanoparticles well-dispersed on the porous surface of the magnetic core-shell nanocomposite was fabricated. in the hydrogenation of nitrobenzene and 2-nitrochlorobenzene to the corresponding aniline compounds, the hierarchically porous catalyst showed superior performances to its counterpart with a monomodal porous structure. in addition, the used catalyst could be separated conveniently from the reaction system with an external magnetic field. subsequent recycling tests further confirmed the outstanding reusability and regeneration ability of the composite catalyst. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 学科主题 | 物理化学 |
| 类目[WOS] | chemistry, physical ; energy & fuels ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; energy & fuels ; materials science |
| 关键词[WOS] | pseudomorphic transformation ; composite microspheres ; shell nanoparticles ; mesoporous spheres ; nanospheres ; fabrication ; carbon ; nanoreactors ; carriers ; particles |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339004100026 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/144323]  |
| 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.Chinese Acad Sci, Lab Catalysts & New Mat Aerosp, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Changzi,Wang, Yanjie,Wei, Haisheng,et al. Magnetic iron oxide nanoparticles coated by hierarchically structured silica: a highly stable nanocomposite system and ideal catalyst support[J]. journal of materials chemistry a,2014,2(29):11202-11208. |
| APA | Jin, Changzi.,Wang, Yanjie.,Wei, Haisheng.,Tang, Hailian.,Liu, Xin.,...&Wang, Junhu.(2014).Magnetic iron oxide nanoparticles coated by hierarchically structured silica: a highly stable nanocomposite system and ideal catalyst support.journal of materials chemistry a,2(29),11202-11208. |
| MLA | Jin, Changzi,et al."Magnetic iron oxide nanoparticles coated by hierarchically structured silica: a highly stable nanocomposite system and ideal catalyst support".journal of materials chemistry a 2.29(2014):11202-11208. |
入库方式： OAI收割
来源：大连化学物理研究所
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