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| 论文编号: |
122214O120130165 |
| 第一作者所在部门: |
611组 |
| 中文论文题目: |
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| 英文论文题目: |
Controlled Fabrication of Iron Oxide/Mesoporous Silica Core-Shell Nanostructures
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| 论文题目英文: |
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| 作者: |
张明伟
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| 论文出处: |
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| 刊物名称: |
The Journal of Physical Chemistry
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| 年: |
2013
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| 卷: |
117 |
| 期: |
1 |
| 页: |
21529-21538 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
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| 摘要: |
A simple and reproducible method for the preparation of
well-defined iron oxide/mesoporous silica core-shell nanostructure is
provided. Iron oxide nanocubes with a narrow size distribution were
synthesized through a novel ethanol/acetic acid system using Fe(NO3)·
9H2O as an iron source and polyvinylpyrrolidone as a capping agent under
mild solvothermal conditions (200 °C). These monodisperse nanoparticles
were used directly as the core for the deposition of a mesoporous silica shell
via a sol？gel process, resulting in uniform core？shell Fe2O3@SiO2
composites with tailored silica shell thickness and controllable core
morphology. In addition, composition as well as magnetization of the
reduced core？shell composites could easily be controlled by a reduction
process. Furthermore, the iron oxide core in Fe2O3@SiO2 could be
completely etched to produce hollow SiO2 nanospheres. The mechanism of
formation of the core？shell structure was also proposed by the aid of IR spectrum analysis. |
| 英文摘要: |
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